Halfen Castin Channel Fixings

CI/SfB Xt6

May 2005

HALFEN4.6

HALFEN4.6

CONCRETE

HALFEN CAST-IN CHANNELS

Halfen cast-in channels

Introduction

Halfen technical helpline: 08705 316300

IntroductionHalfen channels are a range of rolled steelprofiles designed to provide secure fixings intoconcrete. The channels are rectangular insection and bonded to the concrete byanchors. Each channel is complemented bymatching T-head bolts.

This guide contains technical information onthe full range of Halfen channels and T-headbolts, and shows how they can be used in awide variety of structural, civil, architecturaland services applications.

UseThe channels are fixed to the formwork priorto the casting of the concrete. When theformwork is struck, each channel provides aslot, into which Halfen T-head bolts can befixed in any position along the length.

Size range

This guide includes the full selection of Halfenchannel sizes, shown in load ranges onseparate page spreads. T-head bolts areavailable in a choice of diameters and lengthsfor each channel size.

Range of types/sizes

A wide choice of channel sizes is available inboth hot rolled and cold formed material tosuit a variety of load conditions, for example:single point loads from 3.5 kN (using M10bolts) to 32 kN (using M30 T-head bolts).

Channels are also manufactured with toothedlips for M16 and M12 T-head bolts andlongitudinal loads of up to 12 kN.

2

Channel anchorpositioned inreinforcement cage

Cold formed Halfenchannel filled withpolystyrene to excludeconcrete during casting

Structural fixing in edgeof concrete using verticaltoothed channel HZA andtoothed T-head bolts

HTA 41/22* cast-inchannel, back nut andthreaded rod hangers

*Compatible with standard strut system/channels (see separate data sheet)

Type HM or HL framingchannel on hangers tocarry services pipework

Halfen cast-in channels – typical installations and some possible applications

3Halfen technical helpline: 08705 316300

T-head boltface-enteredinto channel

T-head bolt turnedthrough 900

and blockedinto position

Single bolt fixing cleat andhot rolled cast-in channel

Cladding mullionfixed to Halfen cast-inchannel by cleatsand T-head bolts

Cleat maybe toothed forvertical adjustment

Advantages of Halfen cast-in channels● free of noise and vibration of power tools

● easy to use – simple nailing to formwork makes errors unlikely

● safe near edges of concrete and close together

● suitable for bolt pairs on a single channel

● adjustable to take up building tolerances

● T-head bolts installed quickly

● shank of bolt clearly visible through nut

● free of expansion forces when torquing, therefore no damage to concrete edge

● correct engagement of T-head bolt indicated by cross mark on end of shank

Channel lengths

Halfen channel is rolled in standard 6070 mmand 3050 mm lengths. Stock cut lengths areavailable in two options: standard stock andstandard specials, see page 7. However, anylength can be made to order, and suitableanchor spacing agreed with Halfen to suit theapplication.

Applications

Halfen channels are suitable for all types ofconstruction fixing applications, such as theflexible positioning of mechanical services, lift guides or structural fixings for majorcomponents such as pre-cast panels andcurtain walling.

Metal deck

Halfen channels are also ideal for use inconjunction with metal decks, where slabs arethin and perimeter fixings are required.

Hand Arm Vibration

Cast-in channels provide safe, secure fixingsinto concrete without the need for drilling,helping specifiers and contractors meet theirresponsibilities under the new Control ofVibration at Work Regulations (effective July2005). See page 39 for more information.

Loads, bolts and torque

Introduction


Teeth pitch3mm

T-headbolt

Allowablelongitudinalload

Typical section through

longitudinal application.

Pull-out load Transverse shear load Resultant load

Load direction

Halfen cast-in channel is suitable for loads inall directions, as shown in the diagrams above.Where the load is longitudinal it may beadvantageous to use Grade 8.8. bolts ortoothed channel to achieve the required load.Where the load is transverse shear, the paralleledge distance may increase (see allowableload tables).

Edge distances/load spacing

Halfen cast-in channel is particularly goodclose to edges and in pairs close together forfour bolt connections. (For details seeindividual channel pages.)

Concrete grade/reinforcement

The load data tables in this guide assumechannel cast in reinforced concrete Grade C35or better. Channel anchors must always bepositioned within the reinforcement cage, notin the concrete cover. (The cage could be twolayers of mesh. For details, please consultHalfen Limited.)

T-head bolts

Normally, fixings to Halfen channels are bydrop forged T-head bolts, face-entered intothe channel after the concrete has set. Theprojecting bolt has a cross mark on the end ofthe shank so that the correct engagement ofthe T-head in the channel lips can be clearlyseen. (For bolt details see product data pages.)

The allowable load capacity of a fixingdepends on the channel and the anchorspacing. The T-head bolt is rarely critical, as itscapacity normally exceeds that of the rolledprofile. Small diameter bolts in large channelsshould be checked using the following table.

Locking plates

Where the use of a standard set screw, orthreaded rod, is preferred, back nuts orlocking plates sized to suit every channel areavailable.

Locking plates are also face-entered into thechannel after the concrete has set.

The torque data for Grade 4.6 or stainless steelbolts, as shown alongside, should be used.

Washers

If nuts are clamped tight to the lips of thechannel, then plate washers are required tobridge the slot. Plate washers are alsorequired, if the component is slotted.

Standard stock washers are shown below. Fordimensions, please consult Halfen Limited.

T-head bolt Grade 4.6 or stainless steeldiameter Max. allowable load on bolt shank

Pull-out/transverse shear

M20 27.0 kN

M16 17.3 kN

M12 9.3 kN

M10 6.4 kN

M8 4.0 kN

M6 2.2 kN

Tightening torque

Torque is not normally critical when usingcast-in channel and T-head bolts; in mostcases the hook head ensures safeengagement. When the load is in thelongitudinal direction, the clamping forceshould be carefully checked. As a guide,tightening torque figures are given below:

Tightening torqueT-head bolt Grade 4.6 or Grade 8.8*diameter stainless steel

(N/m) (N/m)

M30 400 –

M27 300 500

M 24 200 500

M20 120 300

M16 60 150

M12 25 70

M10 15 30

M8 8 –

M6 3 –

M16 toothed 70 70

M12 toothed 25 70

* Grade 8.8 bolts should normally only be used in hot rolled channels.For Grade 8.8 bolts in circular holes use hardenedwashers.For Grade 8.8 bolts in slots use plate washers plushardened washers.

D

t

D

t

D

t

L

t

Ordinarywashers,plated, hdgor stainless(Form A)

Halfenwashers,plated orstainless(over-size)

Spring washers,plated, hdg orstainless

Square platewashers, plated,hdg or stainless

Fixing to formwork

Channels are manufactured with standardholes in the back and are normally fixed withnails (see details on page 29).


Halfen hot rolled channels for dynamic loads

HTA 72/48

Page 10

Halfen channels with toothed lips for longitudinal loads

HTA 52/34

Page 12

HTA 50/30

Page 12

HTA 40/22

Page 14

Halfen cold formed channels for static loads

HTA 54/33

Page 12

HTA 49/30

Page 12

HTA 40/25

and 40/23

Page 14

HTA 38/17

Page 16

HTA 28/15

Page 16

HZA 41/22

Page 18

HZA 38/23

Page 18

HZA 29/20

Page 18

22

41

23

38

20

29

Product selector

The full range of Halfen cast-in channels and matching T-head boltsRefer to the following pages for full technical information

Skis and Pourstop (HPS) Page 20

Channel profiles without anchors Page 30

Applications Page 32

72

48

34

30

22

52

50

40

33

30

25

54

49

40

17

15

38

28

Variations Page 28

Longitudinalapplication

of Halfenchannel withtoothed lips

Materials, anchors and channel fabrications

Introduction


Channel fabrications

1) Spaced assemblies

Where double or multiple fixings are requiredat known centres, channels can be welded tospacer straps, as shown below. The strapskeep the channels parallel and accuratelyspaced along their length.

The spacer straps can be extended, as shown,to butt with an adjacent formwork face, andact as a simple setting-out guide. The use ofspaced assemblies offers a significantreduction in setting-out time on site.

2) Corners

Channels can be easily fabricated to suitcorners, see below. (Smaller channels may befolded; larger channels are welded.)

3) Curves

Channels can be easily curved to an internal orexternal radius (lips inward or lips outward).

Curves on elevation, such as brick arch details,require special care. Please consult HalfenLimited.

6

Channel pair (4-bolt connection) fabricated by Halfen to order.

Hot rolled or cold formed

Halfen channels are manufactured by bothprocesses. Hot rolled channels are better fordynamic loads, because the material has nolocked-in stress. Cold formed channels areideal for static loads and for economy.

Channels

Channels are rolled from mild steel (i.e. carbonsteel) Grade S 235 or S 275 and are finishedhot dip galvanised (hdg) to BS EN ISO 1461.Some channels for mechanical services arenormally pre-galvanised to BS EN 10142Z275.

Channels are also rolled in austenitic stainlesssteel, and most are available in two grades, A2and A4.

Grade A2 (1.4301) approximates to UKStandard 304: it has good resistance tocorrosion in all but the most aggressiveatmospheres, and is the industry standard forbuilding fixings and assemblies.

For some applications the higher gradestainless steel may be required: Grade A4(1.4571/1.4401) approximates to UKStandard 316. It contains molybdenum whichgives the surface greater resistance to surfacepitting/staining and is therefore more suitablefor use where components are to be polishedor used in an aggressive atmosphere.However, a marine environment may requirespecial consideration.

For full details of steel grades, if required,please contact Halfen Limited.

T-head bolts

Halfen bolts are drop-forged so that the T-head and the shank are formed in one. Theyare made in either carbon steel or stainlesssteel. Carbon steel bolts are normally finishedbright zinc plated (bzp) to provide a 12 micronzinc coating to BS 3382: Part 2: 1961. Somebolts are available in a higher grade specialcoating, please consult Halfen Limited. Boltsavailable hot dip spun galvanised (hdg) to BS EN ISO 1461 are shown in the tables, butthe whole range can be hot dip spungalvanised to order, subject to shank diameter.Carbon steel grades are either 4.6 or 8.8.

Corner fabricated unit

Curved channels (internal and external radius)

Stainless steel bolts are available in Grade A2(304), which is suitable for most applications.They are also available in High Grade A4(316), if required for onerous conditions.Halfen manufacture two strength propertyclasses, 50 and 70. If details are required,please contact Halfen Limited.

Specifying stainless steel – general note

If the grade of stainless steel is not specifiedon the order, then Grade A2 (304) willnormally be supplied, where available.

Anchors

Halfen channels are rectangular profiles withanchors to provide bond to the concrete.Halfen design and supply the anchors fixed tothe backs of the channels. Channel profiles arekept in stock with anchors ready fitted andfinished.

Anchor spacing

Anchors on standard stock long lengths areattached at 250 mm maximum centres. Onstandard stock short lengths the anchors arefixed at the centres shown on page 7. Onspecial stock short lengths the anchors can beset out by Halfen to dimensions agreed withthe customer. Note: the normal maximumspacing between anchors is 250 mm.

Anchor design/variations

In most cases the anchors supplied are the‘bolt’ type, which is fixed to the channelduring manufacture by an automated process.

For some purpose-made lengths orfabrications, where ‘bolt’ anchors cannot beused, ‘I’ anchors or ‘wave’ anchors can besupplied, see illustrations below.

(Where V-shaped or low profile anchors arerequired, see examples on page 28.)

‘I’ anchor and ‘wave’ anchor

7

Positioning of anchors to standard short lengths

Anchor centres (mm)

Standard channel lengths (mm)

Anchor centres (mm)

Standard channel lengths (mm)

Anchor centres (mm)

Standard channel length (mm)

*Channels 72/48, 52/34 and 54/33 are not normally available in 100 mm lengths. If required,please consult Halfen Limited

3) Purpose-made lengths

Other short lengths are available to order (with anchor positioning to suit the job requirements).Please consult Halfen Limited.

25020015010060

300250200150100*

150 150 175 175 250 250

350 400 550

multiples of 25025 mm (preferred)

2) Short lengths

Short cut lengths are particularly useful forbolt pairs, near edges and for fixings such aspre-cast panels and curtain walling.

Short lengths are available up to 800 mm asstandard stock (with anchor numbers andcentres as shown below).


250 250

800

250

Standard stock Anchor No of Standard special Anchor No of lengths (mm) centres (mm) anchors lengths (mm) centres (mm) anchors

100 (not all channel sizes*) 60 2 – – –

150 100 2 – – –

200 150 2 – – –

250 200 2 250 100 3

300 250 2 300 125 3

350 150 3 350 100 4

400 175 3 400 116 4

– – – 450 100 5

550 250 3 550 125 5

800 250 4 – – –

1) Long lengths

In addition to two standard rolled stocklengths, Halfen supply standard cut longlengths from 1050 mm, in (multiples of 250 mm) plus 50 mm (for both mild steel andstainless steel).

Channel lengths

Standard rolled stock Anchor No oflengths (mm) centres* (mm) anchors

3050 250 13

6070 250 25

* Certain channels are available with anchors at:200 mm centres Code K150 mm centres Code M

Standard cut long Anchor No oflengths (mm) centres (mm) anchors

1050 250 5

1300 250 6

1550 250 7

1800 250 8

2050 250 9

2300 250 10

2550 250 11

2800 250 12

3300 250 14

3550 250 15

3800 250 16

4050 250 17

4300 250 18

4550 250 19

4800 250 20

5050 250 21

5300 250 22

5550 250 23

5800 250 24

Where required, short lengths are alsoavailable up to 550 mm as standard specials,with additional anchors as shown below. Forfurther information, please contact HalfenLimited.

Note: any mention of standard lengths is for guidanceonly, channels can be manufactured to fit any detail,please ask.

Positioning of anchors to typical standard cut longlength of channel

Allowable loads summary chartfor fixings with M12 to M24 bolts

Introduction


Introduction

This summary chart shows the allowable loadsfor the main channel types in a basic, at-a-glance format. Details are given for themost common bolt sizes, M12 to M24. For afull material description of both channels andbolts, see page 6. Full data for all channel andbolt sizes are given on pages 10 to 19.

Edge distance

This chart gives the most advantageoussituation for designers, i.e. channel cast in at aminimal edge distance, in reinforced concrete.

Optimum selections

In this and the following charts the optimumcombinations of channel and bolt arehighlighted in red for quick selection ofpreferred specifications.

Long lengths of channel

For the purposes of this guide a long length ofchannel is taken to be any length over 550 mm. Channels are assumed to have singleT-head bolts at nominal 250 mm centres.

Short lengths of channel/channel with two anchors

A typical channel 150 mm long is assumed tohave two anchors and a single T-head boltworking at the allowable load. If required, thisload can also be spread over two bolts.

Channels with 3 or 4 anchors

A typical channel 350 to 450 mm long isassumed to have 3 or 4 anchors and twobolts, in which case each bolt can be workedup to the allowable loads shown.

T-head bolt Channel Details Dynamic range Chdiameter size anchor process page no. ∆∆F (kN)

Carbon steel onlyN = 2 ×× 106

M24 72/48 HTA hot rolled 10 7.0 hd


52/34 HTA hot rolled 12 7.0 hd





Notes:Optimum channel/bolt combinations are highlighted in red.hdg = hot dip galvanisedFor longitudinal loads, see Halfen toothed channel, page 18. For metal deck details, see page 20.

Channel pairs

A pair of channels can be designed closetogether, see illustration opposite. Halfen willfabricate the assembly as a pair, if required.

Four-bolt connection

Because channels can be fixed close together,they are ideal for four-bolt fixing, i.e. twopairs of bolts. These can be safely fixed closetogether, see illustration opposite.

Dynamic loads

Fmax

Fmin

∆F

Halfen hot-rolled cast-in channels are suitable for supporting high dynamic loads. The chartbelow gives examples of the stress cycles (N)and loads that can be achieved. For further details, please consult Halfen Limited.

annel material T-head bolt materialcarbon carbon stainless steel steel steel4.6 8.8

g or stainless ✓ ✓ ✓

g or stainless ✓ ✓ –






aa

100 mm

CL

CL

Min. slabthickness

ae

ar

aa

150 mm

100 mm

CL

CL250 mm


Bolt pair – three anchors –with typical bolt spacing

Long length – withtypical bolt spacing

Bolt pair – four anchors –with typical bolt spacing

Single bolt – short length

Channel pair – four bolts

T-head bolt Channel Allowable loads in reinforced concrete (kN) Allowable spacing in reinforced concrete (mm)diameter size (pull-out, transverse shear or resultant loads) Channel spacing – min. dimensions Extreme bolt Min. slab

Long length Short channel with bolt pair Normal pair Parallel edge* End edge position thicknessor single bolt 3-anchor 4-anchor aa ar ae eb

M24 72/48 32.0 54.0 64.0 200 130 (200) 90 40 200

M20 72/48 27.0 54.0 54.0 200 130 (200) 75 40 200

52/34 25.0 40.0 50.0 150 100 (150) 75 30 200

54/33 25.0 40.0 50.0 150 100 (150) 75 30 200

50/30 12.5 22.0 25.0 125 85 (110) 60 25 125

49/30 12.5 22.0 25.0 125 85 (110) 60 25 125

M16 52/34 17.3 34.6 34.6 125 100 (120) 60 30 200

54/33 17.3 34.6 34.6 125 100 (120) 60 30 200

50/30 12.5 22.0 25.0 125 85 (110) 60 25 125

49/30 12.5 22.0 25.0 125 85 (110) 60 25 125

40/22 8.0 16.0 20.0 100 75 (100) 50 20 115

40/25 8.0 16.0 20.0 100 75 (100) 50 20 115

M12 40/25 8.0 16.0 18.6 100 75 (100) 50 20 11538/17 6.0 12.0 14.0 100 75 (100) 50 18 100

Notes:* Parallel edge – two dimensions are given: the first applies to pull-out loads, the second (in brackets) applies to transverse shear loads.Allowable loads quoted are after application of a Safety Factor of approximately 2.5 on test in reinforced concrete.Minimum slab thickness assumes standard anchor length. For short anchors, please consult Halfen Limited.For 3 or 4 bolts on a short length of channel, please consult Halfen Limited.

250 250

250 150 150

150

125 125 125

100

eb

aa

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Halfen channels and T-head bolts

Product data


48119

Bolt length

515.5

Cover

Min. concrete thickness

7232 16 33

HTA 72/48 channel

The channel shown on this page is heavy dutyand is typically used with M24 T-head bolts.However, diameters M20, M27 and M30 arealso available, as shown opposite.

Pull-out and transverse shear loads

The allowable single bolt loads range from 25 to 32 kN (or 64 kN for bolt pairs), asshown opposite. Any resultant load must notexceed the allowable pull-out load. The shankof a small bolt in a large channel may limit theallowable load; check the allowable bolt loadin the table on page 4.

Longitudinal loads

This channel has smooth lips, thereforelongitudinal loads are relatively small. Thesemay be increased by the use of high torqueon 8.8 bolts, see the table on page 4. Forchannels with toothed lips, see page 18.

Materials

Channel HTA 72/48 is available in carbonsteel hot dip galvanised (hdg) and stainlesssteel.

Edge distances and spacing

Channels are particularly efficient when cast-inclose to edges and close to each other, see thedimensions in the table opposite.

Available channel lengths

The channel is available in two standard rolledlengths, 3050 and 6070 mm. Any lengthformed of (multiples of 250 mm) + 50 mm canbe cut to order. For common applications thefollowing standard stock short lengths ofchannel are available:

HTA 72/48hot rolled channel

Standard stock Anchor No ofshort lengths (mm) centres (mm) anchors

100* 60 2

150 100 2

200 150 2

250 200 2

300 250 2

350 150 3

400 175 3

550 250 3

800 250 4

*Channel HTA 72/48 is not normally available in 100 mmlengths. If required, please consult Halfen Limited.For standard special short lengths, see page 7.

Order code for cast-in channels

HTA 72/48 hdg 550 5

type size material/ length Number of(mm) finish (mm) anchors*

Note* Number of anchors need only be stated for standardspecial short lengths, as required to achieve the load dataquoted in the table opposite.

Channel type: HTA 72/48

Bolt Channel Allowable loads in reinforced concrete (kN) Minimum spacing in reinforced concrete (mm)diameter profile (pull-out, transverse shear or resultant loads) (longitudinal loads) Channel spacing Extreme bolt position/

(HTA) Long length Short channel with bolt pair Single bolt Normal pair Parallel edge* End edge min. cut edge distanceor single bolt 3-anchor 4-anchor 4.6 and 8.8 aa ar ae eb ec

stainless

M30 72/48 32.0 54.0 64.0 8.25 – 200 150 (200) 90 40 30

M27 72/48 32.0 54.0 64.0 6.25 12.5 200 150 (200) 90 40 30

M24 72/48 32.0 54.0 64.0 4.25 12.5 200 130 (200) 90 40 30

M20 72/48 27.0 54.0 54.0 3.5 – 200 130 (200) 90 40 30

Notes:* Parallel edge – two dimensions are given: the first applies to pull-out loads, the second (in brackets) applies to transverse shear loads.Optimum channel/bolt combinations are highlighted in red.Allowable loads quoted are after application of a Safety Factor of approximately 2.5 on test in reinforced concrete.For applications using 3 or 4 bolts in a short length of HTA channel, please consult Halfen Limited.The channels on this page have smooth lips. For toothed channels, see page 18. For suggested torque values, see page 4.


250 250

250 150 150

150

125 125 125

100

T-head bolts for channel HTA 72/48

Bolt diameter Carbon steel bolt lengths available (mm) Grade 8.8 Grade 8.8 Stainless steel bolt lengths available (mm)Grade 4.6 (HS) (HS) (HSR) A4 (HS)

M30 75, 100, 150, 200

M27 75, 100 100

M24 50, 75, 100, 150, 200 75, 100, 150 50, 100

M20 50, 75, 100, 150, 200 75, 100 50

Notes

Mild steel bolts are available in two finishes: bright zinc plated (bzp) and hot dip galvanised (hdg). In the above table availability is shown as follows:bold = bright zinc plated or hot dip galvanised plain = bright zinc plated only italic = hot dip galvanised onlyHS = standard head; HSR = nibbed head (grade 8.8 only)All bolts are supplied with hexagonal nuts. T-head width: 58 mm.

eceb

Allowable load (single bolt): 32 kN

Allowable load (bolt pair): 64 kN

HALFEN4.6

HALFEN4.6

Locking plates

For fixing applications using threaded rod or studding, locking plates areavailable in carbon steel bright zinc plated (bzp) only. The locking platesare face-entered into the lips of the channel.

Rod/stud Allowable loads (kN) for locking plates

diameter Heavy dutyType GWP 72/48

M20 22.0

M16 17.3

M12 9.3Heavy dutyGWP 72/48

T-head bolt

Locking plate

Order code for carbon steel T-head bolts

HS 72/48 hdg 4.6 M24 100

bolt size finish strength diameter length prefix (mm) grade* (mm)

* Strength grade 4.6 will be supplied unless statedotherwise.

Order code for stainless steel T-head bolts

HS 72/48 stainless A4 M24 100

bolt size material quality diameter length prefix (mm) (mm)

All stainless steel bolts in this group are strength grade 50.

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Examples

Product data



Channel types: HTA 52/34 HTA 54/33 HTA 50/30 HTA 49/30

52

54

34

33

4

5

11.5

5020

30

10

24 11

24 11

2.75

8

4920

3060

10

3.25 7.5

7.5

Bolt length

Bolt length

Bolt length

Bolt length

60




119

119

Cover

Cover


Cover

Cover

22

22

22

22

The group

All the channels shown on this page use thesame T-head bolt, which is available indiameters M10 to M20 and in the range oflengths shown opposite.


The allowable single bolt loads range from12.5 to 25 kN (or 50 kN for bolt pairs), asshown opposite. Any resultant load must notexceed the allowable pull-out load. The shankof a small bolt in a large channel may limit theallowable load; check the allowable bolt loadin the table on page 4.

Longitudinal loads

The channels in this group have smooth lips,so longitudinal loads are relatively small. Thesemay be increased by the use of high torqueon 8.8 bolts, see the table on page 4. Forchannels with toothed lips, see page 18.

Materials

The channels are available in carbon steel hotdip galvanised (hdg) and stainless steel.


Channels are particularly efficient when fixedclose to edges and close to each other, see thedimensions in the table opposite.


The channels are available in two standardrolled lengths, 3050 and 6070 mm. Anylength formed of (multiples of 250 mm) + 50 mm can be cut to order. For commonapplications the following standard stock shortlengths of channel are available:

HTA 49/30 cold formed channel

HTA 54/33 cold formed channel


100 (not all channel sizes*) 60 2

150 100 2

200 150 2

250 200 2

300 250 2

350 150 3

400 175 3

550 250 3

800 250 4

*Channels HTA 52/34 and 54/33 are not normallyavailable in 100 mm lengths. If required, please consultHalfen Limited.For standard special short lengths, see page 7.


HTA 52/34 hdg 550 5


HTA 50/30 hot rolled channel


Note to Order Code* Number of anchors need only be stated for standardspecial short lengths, as required to achieve the load dataquoted in the table opposite.




stainless

M20 52/34 25.0 40.0 50.0 3.3 10.5 150 100 (150) 75 30 25

54/33 25.0 40.0 50.0 3.3 – 150 100 (150) 75 30 25

50/30 12.5 22.0 25.0 3.3 8.0 125 85 (110) 60 25 20

49/30 12.5 22.0 25.0 3.3 – 125 85 (110) 60 25 20

M16 52/34 17.3 34.6 34.6 2.5 8.0 130 100 (130) 60 30 25

54/33 17.3 34.6 34.6 2.5 – 130 100 (130) 60 30 25

50/30 12.5 22.0 25.0 2.5 6.0 125 85 (110) 60 25 20

49/30 12.5 22.0 25.0 2.5 – 125 85 (110) 60 25 20

M12 52/34 9.3 18.6 18.6 1.5 – 125 85 (100) 50 30 25

54/33 9.3 18.6 18.6 1.5 – 125 85 (100) 50 30 25

50/30 9.3 18.6 18.6 1.5 – 100 75 (100) 50 25 20

49/30 9.3 18.6 18.6 1.5 – 100 75 (100) 50 25 20


HALFEN4.6

HALFEN4.6

T-head bolts for channels HTA 52/34, 54/33, 50/30, 49/30


M20 35, 45, 55, 65, 75, 100, 125, 150, 200, 300 45, 60, 80, 100, 150 45, 60, 75 45, 55, 75, 100, 125, 150

M16 30, 40, 50, 60, 80, 100, 125, 150, 200, 300 40, 60, 80, 100 40, 60 30, 40, 50, 60, 80, 150

M12 30, 40, 50, 60, 80, 100, 125, 150, 200 45, 60, 80 30, 40, 50, 100

M10 30, 40, 50

Notes

Mild steel bolts are available in two finishes: bright zinc plated (bzp) and hot dip galvanised (hdg). In the above table availability is shown as follows:bold = bright zinc plated or hot dip galvanised plain = bright zinc plated only italic = hot dip galvanised onlyHS = standard head; HSR = nibbed head (grade 8.8 only)All bolts are supplied with hexagonal nuts. T-head width: 41 mm.

Locking plates

For fixing applications using threaded rod or studding, locking plates areavailable in both carbon steel bzp and stainless steel. The locking platesare face-entered into the lips of the channel.


diameter Heavy duty Light dutyType GWP 50/30 Type GWP 50/40

M16 9.3 6.4

M12 9.3 6.4

M10 6.4 6.4

M8 4.0 4.0

250 250

250 150 150

150

125 125 125

100

eceb


HS 50/30 bzp 4.6 M20 100



Heavy duty GWP 50/30

Light duty GWP 50/40

T-head bolt

Locking plates





bolt size material quality diameter length prefix (mm) (mm)


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Examples

Product data


4016

2252

8

2.56

18

Cover


4016

2551

8

2.75

6.5

18

Bolt length

Bolt length

Cover



HTA 40/25 and HTA 40/23cold formed channel


Channel types: HTA 40/22 HTA 40/25 HTA 40/23


HTA 40/25 hdg 550 5


Note* Number of anchors need only be stated for standardspecial short lengths, as required to achieve the loaddata quoted in the table opposite.

The group

All the channels shown on this page use thesame T-head bolt, which is available indiameters M10 to M16 and in the range oflengths shown opposite. Channels HTA 40/25and HTA 40/23 are the same profile: HTA40/25 is finished hot dip galvanised (hdg);HTA 40/23 is pre-galvanised, i.e. it has athinner zinc coating, and is particularlysuitable for fixing lift guides.


The allowable single bolt loads range from 8 to 10 kN (or 20 kN for bolt pairs). Anyresultant load must not exceed the allowablepull-out load. The shank of a small bolt in alarge channel may limit the allowable load;check the allowable bolt load in the table onpage 4.

Longitudinal loads

The channels in this group have smooth lips,so longitudinal loads are relatively small. Thesemay be increased by the use of high torqueon 8.8 bolts, see the table on page 4. Forchannels with toothed lips, see page 18.

Materials

The channels are available in carbon steel hotdip galvanised (hdg), pre-galvanised andstainless steel.




The channels are available in two standardrolled lengths, 3050 and 6070 mm. Anylength formed of (multiples of 250 mm) + 50 mm can be cut to order. For commonapplications standard stock short lengths ofchannel are available in the lengths shown inthe adjacent table, left.


100 60 2

150 100 2

200 150 2

250 200 2

300 250 2

350 150 3

400 175 3

550 250 3

800 250 4

For standard special short lengths, see page 7.






stainless

M16 40/22 8.0 16.0 20.0 2.5 7.0 100 75 (100) 50 20 20

40/25 8.0 16.0 20.0 2.5 – 100 75 (100) 50 20 20

40/23 8.0 16.0 – 2.0 – 100 75 (100) 50 20 20

M12 40/22 8.0 16.0 18.6 1.5 – 100 75 (100) 50 20 20

40/25 8.0 16.0 18.6 1.5 – 100 75 (100) 50 20 20

40/23 8.0 16.0 – 1.5 – 100 75 (100) 50 20 20


HALFEN4.6

HALFEN4.6

T-head bolts for channels HTA 40/22, 40/25, 40/23


M16 30, 40, 50, 60, 80, 100, 125, 150, 200, 250, 300 60, 80 40, 60 30, 40, 50, 60, 80, 100, 150, 200

M12 20, 30, 40, 50, 60, 80, 100, 125, 150, 200 45, 60, 80, 100 30, 40, 50, 80, 100, 150

M10 20, 30, 40, 50, 60, 80, 100 30, 40, 50

Notes

Mild steel bolts are available in two finishes: bright zinc plated (bzp) and hot dip galvanised (hdg). In the above table availability is shown as follows:bold = bright zinc plated or hot dip galvanised plain = bright zinc plated only italic = hot dip galvanised onlyHS = standard head; HSR = nibbed head (grade 8.8 only)All bolts are supplied with hexagonal nuts. T-head width: 32.5 mm.

Locking plates



diameter Heavy duty Light dutyType GWP 40/22 Type GWP 38/17

M12 9.3 5.7

M10 6.4 5.7

M8 4.0 4.0

M6 2.2* 2.2

* Not available in stainless steel.

250 250

250 150 150

150

125 125 125

100

eceb

Heavy duty GWP 40/22

Light duty GWP 38/17

T-head bolt

Locking plates


HS 40/22 bzp 4.6 M12 100





bolt size material quality* diameter length prefix (mm) (mm)


aa

arae

Examples

Product data


3816

1751

8

3

18

Bolt length

Cover



HTA 38/17cold formed channel

Channel types: HTA 38/17 HTA 28/15

2812

1532

6

2.3

12

Bolt length

Cover


HTA 28/15cold formed channel


HTA 38/17 hdg 550 5




100 60 2

150 100 2

200 150 2

250 200 2

300 250 2

350 150 3

400 175 3

550 250 3

800 250 4

For standard special short lengths, see page 7.

The light load group

The channels shown on this page have flat,not hooked lips. They are relatively light dutyand low profile so that they are easy to placein the reinforcement cage. Fixings for channelHTA 38/17 are not the same as for HTA28/15. Channel HTA 38/17 takes bolts fromM10 to M16 diameter. Channel HTA 28/15takes bolts from M6 to M12 diameter.


The allowable single bolt loads range from 3.5to 7 kN, as shown opposite. Any resultantload must not exceed the allowable pull-outload. The shank of a small bolt in a largechannel may limit the allowable load; checkthe allowable bolt load in the table on page 4.

Longitudinal loads

The channels in this group have smooth lips,therefore longitudinal loads are relatively small.These may be increased by the use of hightorque on 8.8 bolts, see the table on page 4.For channels with toothed lips, see page 18.

Materials

The channels are available in carbon steel hotdip galvanised (hdg) and stainless steel.

Channel HTA Type K

Channel HTA 38/17 is stocked in a Type Kversion in stainless steel with anchors atstandard 200 mm nominal centres on longlengths; this version is designed for use withbrick support systems. Allowable loads cantherefore be used at 200 mm centres.




The channels are available in two standardrolled lengths, 3050 and 6070 mm. Anylength formed of (multiples of 250 mm) + 50 mm can be cut to order. For commonapplications standard stock short lengths ofchannel are available in the lengths shown inthe adjacent table, left.

Brick ties

Channel HTA 28/15 is commonly used forbrick ties. For this use and for Ribslot cast-inself-anchoring channel, please refer to theHalfen Brick Support and Restraint brochure.




T-head bolts for channels HTA 38/17 and 28/15

Channel Bolt Carbon steel bolt lengths available (mm) Grade 8.8 Stainless steel bolt lengths available (mm)profile diameter Grade 4.6 (HS) (HS) A4 (HS) A2 (HS)

38/17 M16 20, 30, 40, 50, 60, 80, 100, 125, 150, 200 60 25, 30, 40, 50, 60, 80, 100, 150, 200 30, 40, 50

M12 20, 30, 40, 50, 60, 80, 100, 125, 150, 200 70 25, 30, 40, 50, 60, 80, 100, 150, 200 30, 40, 50

M10 20, 30, 40, 50, 60, 80, 100, 150 30, 40, 50, 60

28/15 M12 30, 50, 80

M10 15, 20, 25, 30, 40, 50, 60, 80, 100, 125, 150, 200 40 20, 25, 30, 40, 50, 60, 80, 100, 125, 150, 200 20, 25, 30, 40, 50

M8 15, 20, 25, 30, 40, 50, 60, 80, 100, 150 30 30

M6 15, 20, 25, 30, 40, 50, 60

Notes

Mild steel bolts are available in two finishes: bright zinc plated (bzp) and hot dip galvanised (hdg). In the above table availability is shown as follows:bold = bright zinc plated or hot dip galvanised plain = bright zinc plated only italic = hot dip galvanised onlyHS = standard head; HSR = nibbed head (grade 8.8 only)All bolts are supplied with hexagonal nuts. T-head widths: 38/17 = 30.5 mm; 28/15 = 22.5 mm.



stainless

M16 38/17 6.0 12.0 14.0 2.0 4.5 100 75 (100) 50 18 15

M12 38/17 6.0 12.0 14.0 1.5 3.0 100 75 (100) 50 18 15

Type K 7.0 – – 1.5 – 100 75 (100) 50 18 15(anchors at 200 c/c)

M10 28/15 3.5 7.0 8.5 1.0 3.0 75 65 (75) 40 18 15

Notes:* Parallel edge – two dimensions are given: the first applies to pull-out loads, the second (in brackets) applies to transverse shear loads.Allowable loads on M12 bolts in 28/15 channel are as for M10 bolts.Allowable loads quoted are after application of a Safety Factor of approximately 2.5 on test in reinforced concrete.For applications using 3 or 4 bolts in a short length of HTA channel, please consult Halfen Limited.The channels on this page have smooth lips. For toothed channels, see page 18. For suggested torque values, see page 4.

HALFEN4.6

HALFEN4.6

Locking plates



diameter Light duty Light dutyType GWP 38/17 Type GWP 28/15

M12 5.7 Not available

M10 5.7 3.0

M8 4.0 2.8

M6 2.2 1.9

250 250

250 150 150

150

125 125 125

100

eceb

GWP 38/17

GWP 28/15

T-head bolts

Locking plates


HS 38/17 bzp 4.6 M12 100






* Stainless bolts quality A2 will be supplied unless statedotherwise. Stainless bolts are available in strength grades50 or 70. (50 will be supplied unless stated otherwise.)

HALFEN4.6

HALFEN4.6

38/17

28/15

aa

arae

Examples

Product data




The channels are available in two standardrolled lengths, 3050 and 6070 mm. Anylength formed of (multiples of 250 mm) + 50 mm can be cut to order. For standard stockshort lengths of channel see page 7.

Channel types: HZA 38/23 HZA 29/20 HZA 41/22


HZA 38/23 hdg 550 5



HZA 38/23hot rolled channel

HZA 29/20hot rolled channel

HZA 41/22cold formed channel

Bolt length

Teeth pitch3 mm

4 mm


5 mm

Bolt length

Teeth pitch3 mm Allowable

longitudinalload


7 mm

Bolt length

Teeth pitch3 mm

21

41

2373

6038

20

50 min

75 min

Normal min 125

100 min 80 min

Normal min 150 Normal min 125

75 min 60 min

51

298

10

16

20 816

14

18 22

The longitudinal group

The channels shown on this page are a rangeof three different sizes, all with toothed lipsand specially designed to take longitudinalloads. Channels HZA 38/23 and HZA 29/20are manufactured from hot rolled carbon steel.Channel HZA 41/22 is cold formed.

Longitudinal loads

The longitudinal loads allowable on the teethof the channels are shown in the tableopposite; they range from 5.5 to 12 kN. Twobolts may be fixed close together in thechannel to double the longitudinal load(provided the resultant does not exceed thepull-out load).


The allowable single bolt loads in pull-out andtransverse shear range from 8 to 12 kN, seethe table opposite. Any resultant load mustnot exceed the allowable pull-out load.

Materials

Channel 38/23 is hot rolled in both carbonsteel and stainless steel.Channel 29/20 is hot rolled in carbon steelonly.Channel 41/22 is cold formed in carbon steeland stainless steel.






Bolt Channel Allowable loads in reinforced concrete (kN) Minimum spacing in reinforced concrete (mm)diameter profile (pull-out, transverse shear or resultant loads) (longitudinal loads) Channel spacing

(HZA) Long length Short channel with bolt pair Long length Bolt pair Normal pair Parallel edge End edgeor single bolt 3-anchor or single bolt 2-anchor* 3-anchor* aa ar ae

Carbon steel bolts Grade 8.8

M16 38/23 12.0 20.0 12.0 20.0 24.0 125 85 75

41/22 8.0 14.0 5.5 8.0 11.0 100 75 60

M12 38/23 12.0 20.0 12.0 20.0 24.0 125 85 75

29/20 8.0 14.0 8.0 14.0 16.0 100 75 50

41/22 8.0 14.0 5.5 8.0 11.0 100 75 50

Stainless steel bolts

M16 41/22 8.0 14.0 5.5 8.0 11.0 100 75 60

M12 41/22 8.0 14.0 4.0 8.0 8.0 100 75 50

Notes:* Subject to check on resultant load.Allowable loads quoted are after application of a Safety Factor of approximately 2.5 on test in reinforced concrete.For extreme bolt positions and minimum cut edge distances, please consult Halfen Limited.Two bolts on the same channel taking longitudinal loads can be as little as 50 mm apart; please consult Halfen Limited.For suggested torque values, see page 4.

250 250

250 150 150

150

T-head bolts Lockingplate


HZS 38/23 hdg 8.8 M16 100

bolt size finish strength diameter length prefix (mm) grade (mm)

Order code for stainless steel T-head bolts (41/22)

HZS 41/22 stainless A2 M12 50


* Quality A2 will be supplied unless stated otherwise. All stainless steel bolts in this group are strength grade 50.

T-head bolts for channels HZA 38/23, 29/20 and 41/22

Channel Bolt Carbon steel bolt lengths available (mm) Stainless steel bolt lengths available (mm)profile diameter Grade 8.8 (HZS) A4 (HZS) A2 (HZS)

38/23 M16 30, 40, 50, 60, 80, 100, 125, 150, 200, 300 60

M12 30, 40, 50, 60, 80, 100, 125, 150, 200, 300

29/20 M12 30, 40, 50, 60, 80, 100, 125, 150, 200, 250, 300

41/22 M16 50, 100 35, 50 40, 50, 60, 75

M12 35, 50 35, 50, 80 50

Notes

Carbon steel bolts for channels 38/23 and 29/20 are finished bright zinc plated (bzp) with a special coating.Carbon steel bolts for channel 41/22 are finished hot dip galvanised (hdg).All bolts are supplied with hexagonal nuts.

HZA 38/23 HZA 29/20 HZA 41/22

aa ar

ae

ChannelHZA 41/22only

Examples

Product data


Metal deck and cast-in channels

Thin slabs and edge fixings

Concrete cast on metal decking is commonlyonly 130 mm thick, and the mix is generallylightweight (e.g. Lytag).

Also, fixings for following trades, such as:curtain-walling; brickwork or masonry; pre-cast panels or lift guides, are often requiredclose to the edge of the metal deck.

Halfen cast-in channel fixings have provenperformance in thin slabs and in perimeterlocations. This section describes fixings intothe top of the slab; for fixings into the edge ofthe slab, see page 24.

The multiple anchors on the back of thechannel profile bond well with the concrete,provided they are located within thereinforcement cage, and the channel spreadsthe load over a longer length of slab edge.The extra labour of through-deck fixing canbe avoided, as Halfen channels are easilyplaced before the pour, with anchors of anysuitable length to clear the ribs in the metaldeck. Halfen channel is suitable for both deck-bearing and deck-parallel conditions.

Cleat/bracket design

The use of cast-in channel near to the edge ofthe slab together with T-head bolt pairs atclose centres in the channel, rather thanseparate cast-in fixings, often means that thecleats/brackets can be smaller or thinner, withconsequent and significant savings in material.Halfen channel and anchors can be designedto be slightly recessed into the concretesurface, so that every cleat has a good heelbearing and is therefore less likely to bend.

Edge trim

When Halfen channel is cast into the top ofthe slab the normal builder’s edge trim can beused unaltered.

The channel range

The smaller Halfen channel sections arenormally used in metal deck applications, buthigh loads can be achieved by using bolt pairsat close centres in a single channel.

Top fix

A top of slab fixing normally consists of ashort length of channel, 350 mm long, fortwo T-head bolts.

Fixing centres

Channel Permissible loads (kN) Edgecode Point fixing – bolt pair distance

(channel 350 mm long) (mm)Pull-out or shear

HTA 52/34* 22.0 150

HTA 50/30 20.0 125

HTA 49/30 20.0 125

HTA 40/22 16.0 100

HTA 40/25 16.0 100

HTA 38/17 12.0 75

Notes:* Channel HTA 52/34 may be a tight fit in metaldeck, please discuss the application with Halfen Ltd.Allowable loads quoted are after applying a SafetyFactor of 2.5 on test in reinforced concrete.Resultant loads must not exceed the figure given forpull-out.

Top fixing

Short lengths of channel in top of slab for bolt pairs, positioned atfixing centres to suit cladding mullions or other components

Materials

Channels for top of deck fixings are normallyhot dip galvanised, but stainless steel channelsare also available, if required. For materialspecifications, see page 6.

How to specify

Standard channels are specified as shown onpages 10 to 18. Ski assemblies are specified asshown on page 22.

Common applications

The most common application for top fixing isbrackets for curtain walling.

Other applications include:-fixing wind postsfixing sun screensfixing pre-cast panels.


Top fixing – design considerations

Direction of deck

The channel has the same load capacitywhether the deck is bearing on the beam orparallel to the beam, as shown below.

In deck-bearing applications, the deck maystop at the beam or continue to the edgetrim, i.e. the edge trim may be fixed either tothe structure or to the deck.

Check the channel edge distance with regardto the position of the shear stud.

Deck-bearing: solid concrete edge

Deck-bearing: ribs extended to edge

Edge distance

Edge distance

Edge distance

Ideally, the distance from the centre line of thechannel to the edge of the deck (dimension ‘c’below) will be not less than 100 mm (but 75 mm is possible, subject to discussion). Thesteel beam should be positioned so that thedeck cantilever is kept to a minimum.

Propping

If the cantilever is large, the edge trim mayneed to be propped:1) for the temporary wet condition2) for the final load-bearing condition.

If propping is required, this is normallydesigned by others.

Setting-out

Channels parallel to the edge are normally setout from the grid line, as shown below.

Short lengths of channel for bolt pairs are setout on elevation as shown opposite.

c

Cantileverkept to aminimum

Edge distance Shear stud

Setting out GL

Deck-parallel

This detail may still be possible if only meshreinforcement is available, as shown below.Please consult Halfen Limited, if further adviceis required.

Reinforcement

To achieve high loads at the minimumdimension from the edge of the slab to thecentre of the channel (dimension ‘c’ below)the Halfen channel must be positioned withinthe reinforcement cage so that the anchorscannot be pulled out of the concrete. Localbobs and links are normally sufficient toachieve this.

c

Concrete grade

The concrete density should be minimum1900 kg and strength minimum C 35.

Applications



Alternative Skis

When the position of the metal deck ribsleaves a full concrete edge, Halfen will weldthe channel and anchors to the heightrequired, ready for fixing down to the edgetrim of the deck by self-tapping screws orshot-firing.

Use of standard channel

If the site conditions mean that standardchannel is the best option, and the anchorlength does not clash with the deck ribs, thenthe channel can be held firmly with battens, asshown below, or by other methods. Halfenwill be pleased to advise.

Timber fixing

Top fixing (continued)

Bedding level

Casting level

Rib height

Ski assemblies can also be fabricated to formchannel pairs, i.e. for four-bolt connections.(See illustrations above.)

(Please note that any Halfen ‘Ski’ assembly ona stainless steel channel is normally fabricatedfrom mild steel for economy and ease offixing.)

Casting level

Top fixings are often intended for angle cleatsor shoes, in which case a level bed is essential.Cast-in channel is easy to install level, orslightly recessed, as the anchors can be anylength to suit the height of the ribs of thedeck specified.

Single channel ‘Ski’ assembly

Channel pair ‘Ski’ assembly

‘Ski’ assemblies

Channel length is normally 350 mm for a two-bolt connection (or for a pair with a four-boltconnection). Channels can have three or fouranchors, depending on the load required.

Standard Halfen channel may be placed inposition by either the shuttering carpenter orthe steel fixer, but the anchors can clash withthe ribs of the deck. Work on site can in mostcases be made easier if the Halfen anchors arefabricated to suit the rib height, and joined bya ‘Ski’ assembly, so that they are ready to dropinto place on the deck.

‘Ski’ assemblies are formed of standard Halfenchannel, and can be made to suit any projectdimensions. The light strap that forms thespreader is not structural, but ensures thecorrect spacing of the channels and allowseasy fixing to the deck with self-tappingscrews etc.

Using a ‘Ski’ arrangement means that thedecking contractor has the option of runningthe deck through to the edge trim, makingfixing easier and quicker.

Order code for ‘Ski’ assemblies

SKI 49/30 hdg 350 4 (53) 130

type size material/ channel no of rib overall (mm) finish length anchors height slab

(mm) (mm)* depth

* Enter the rib height as zero, if the channel and anchorsare required to suit the overall slab depth.

How to specify

Halfen ‘Ski’ assemblies should be specified asshown below:


Setting out around columns

Channels can be cast in close together or closeto columns without any loss of load capacity.Halfen are pleased to advise on projectdrawings.

An example of a setting out plan aroundcolumns is shown below.

At the external corner two channels may bewelded together, as shown, so that two boltscan be fixed close to the corner. Channel canalso be set out at 45° across the corner.Channels can be ordered with anchors in anyposition to suit the reinforcement cage.

350

350

35050

Channel 350 longwith 3 anchors

25

100

100


25


25

80

HTA 40/25 channel

Fabricated corner

Special notes for fixing pre-cast panels

For high loads two parallelchannels can be used at closecentres. It is possible to useparallel channels at 100 mmcentres, and hence cleatdimensions are kept to aminimum. Halfen will prepareworking drawings for channelpairs for individual jobs.

For pre-cast panel support,ideally the structure should bepositioned directly below thecleat, i.e. metal deck cantileversare best avoided.

Pre-cast panel support/restraint detail

Special notes for brickwork

Brick support angles fixed to thetop of the deck require carefulspecifying to ensure that thereare no voids in the bed, whichcould lead to unacceptabledeflections at the toe of theangle.

Also, because the load of bothinner and outer skins of theexternal wall is on the deck atthis point, it may be advisableto keep the deck cantilever to aminimum.

For pre-cast panel restraint,normally the minimum edgedistance (i.e. 100 mm) is used,to keep angle sizes economical.A vertical channel in the backof the panel is used for restraintonly, and a threaded rodprovides in and out adjustment.

Pre-cast panel restraint detail

Brickwork support detail

Applications



Thin slabs and perimeter fixings

Concrete cast on metal decking is commonlyonly 130 mm thick, and the mix is generallylightweight (e.g. Lytag).

Also, fixings for the following trades, such as:curtain-walling; brickwork or masonry; pre-cast panels or lift guides, are often required atthe perimeter of the metal deck.

These fixings may be required to provide bothsupport and restraint.

Halfen cast-in channel fixings have provenperformance in thin slabs and in perimeterlocations. This section describes fixings intothe edge of the slab; for fixings into the top ofthe slab, see page 20.

The multiple anchors on the back of thechannel profile bond well with the concrete,provided they are located within thereinforcement cage, and the channel spreadsthe load over a longer length of slab edge.The inconvenience of drilling steel or addingbrackets to steelwork can be avoided by usingcast-in channel in the edge of the slab. Halfenchannel is suitable for both deck-bearing anddeck-parallel conditions.

Pourstop

Installing Halfen channel in the edge of theslab can be carried out by using the traditionalsteel edge trim manufactured by Halfen, withthe channel already installed in the trim. Thisis called Pourstop. The Halfen channel iscontinuous in the edge trim, which is normallymanufactured and supplied in 3 metre lengthsfor butting together on site and fixing aroundthe perimeter of the building. The last infillpiece in any bay can be easily cut to length onsite.

Attaching the channel to the edge trim on siteis not recommended.

Channel casting level

Channel can be fixed in the edge trim at anylevel (dimension ‘d’), provided that theanchors are within the reinforcement cage,but is normally set as high as possible so thatany component bolted to the channel haseffective heel bearing.

Edge fixing: Pourstop

Channel/anchor size range

Normally the smaller Halfen channels are usedfor edge fixing. The typical maximumallowable load per bolt at 200 mm nominalcentres is 7 kN. The most common channelsizes (Code HPS – K) are shown below. Theanchors on the back of the channel arenormally fixed at 200 mm nominal centres forthis edge detail (e.g. a channel 3 m longwould have 15 anchors). Care should be takento ensure that the larger channels 50/30 and49/30 fit under the top reinforcement. Thesechannels may only fit in deeper decks.

Channel Bolt Allowableprofile diameter loads (kN)*

HPS 50/30 K M12 or M16 10.0

HPS 49/30 K M12 or M16 10.0

HPS 40/22 K M12 or M16 8.0

HPS 40/25 K M12 or M16 8.0

HPS 38/17 K M12 or M16 7.0

HPS 28/15 K M10 3.5

*Allowable loads in reinforced concrete (pull-out,transverse shear or resultant loads): continuouschannel with anchors at 200 mm centres (code K)bolts at minimum 225 mm centres.

Materials

The edge trim material is pre-galvanised mildsteel Z275. The cast-in channels may be eithercarbon steel hot dip galvanised or stainlesssteel, depending on the application and theenvironment. T-head bolts may be eitherelectro-plated, hot dip spun galvanised orstainless steel. For material specifications, seepage 6.

How to specify

The vertical edge of the trim will be folded byHalfen to suit the overall slab thickness. Thereturn leg can also be made to order to suitthe design dimension from the vertical edge ofthe trim to the edge of the deck: see Pourstoporder code below:

Order code for Pourstop assemblies

HPS 40/25 hdg 3000 (53) 130 200

type channel channel channel channel overall returnsize material/ length* c/l from slab leg

(mm) finish (mm) top of thick- (mm)slab (mm) ness(dim. ‘d’) (mm)

* Normally only 3.0 metre lengths are manufactured.For other lengths please consult Halfen Limited.

Halfen Pourstop shown fixed ready for deck-parallel applicationand in deck-bearing application with restraint straps


Channel casting level

Channel is normally cast as high as possible,to achieve the maximum possible heel bearingfor any component bolted to it. Halfen willagree the dimension on a job basis, havingregard to the load applied and the productionmethod. Dimension ‘d’ = casting level ofchannel from top of slab

d

Max.125

Cantilever up to 125 mm maximum: exampleabove shows deck bearing on beam andPourstop fixed to beam.

Normal max. = 250

Cantilevers

When using Pourstop, the edge detail shouldbe carefully designed. Halfen are always readyto discuss specific application details, but themain points to consider are as follows:

Edge fixing – design considerations

Direction of deck

The channel has the same load capacitywhether the deck is bearing on the beam orparallel to the beam, as shown below.

In deck-bearing applications, the deck maystop at the beam or it may cantilever, but itmust always stop short of the edge trim sothat there is a solid concrete edge in all cases.

This is required so that any component boltedto the Halfen channel has full bearing at theheel. (See typical details, page 26.)

Deck-bearing: solid concrete edge

Cantilever

Cantilever

Deck-parallel: solid concrete edge

Propping

Ideally, the cantilever should be kept to aminimum. If the cantilever is large, thePourstop may need to be propped:1) for the temporary wet condition2) for the final load-bearing condition.

If propping is required, this is normallydesigned by others.

See also under ‘Cantilevers’.

Halfen channel must be positioned within thereinforcement cage to prevent the anchorbeing pulled out of the concrete. Local bobsand links are normally sufficient to achievethis, but it may still be possible if only meshreinforcement is available, please consultHalfen.

Reinforcement

Cantilever 125 to 250 mm: Pourstop will besupplied by Halfen with a stiffening rib. Theexample above shows deck bearing on beamand Pourstop fixed to deck.

Cantilever greater than 250 mm: a stub maybe required. Halfen would be pleased todiscuss this on a job basis.

The return leg of the Pourstop can be anydimension to suit the fixing conditions shownabove.

Applications for edge fixings

Normally, edge fixings are continuouschannels for bolts at regular centres aroundthe building perimeter. Brick or masonrysupport is the most common application, butchannels are also ideal for fixing lift guides ormechanical services in riser shafts.

Applications


Halfen channel anchors

All Halfen channels for casting into concretehave anchors swaged or welded to the back.The deck bearing must be kept clear of theanchor zone, so that the anchors aresurrounded by concrete, and any bracket orcomponent subsequently fixed to the channelwill have effective heel bearing. See theillustration and table below:

1

2

Channel Dimension Dimensionsize 1 2

50/30 or 49/30 90 – 130 150

40/22 or 40/25 76 110

38/17 68 110

Deck thickness

The thicknesses of most metal deck slabs arein the range 130 to 150 mm, but HalfenPourstop is made to order to suit any deckthickness. Over 150 mm, material thicknessand restraint straps may vary. Halfen will bepleased to prepare job drawings.

Concrete grade

The concrete density should be minimum1900 kg and strength minimum C 35.

Typical details

Halfen channel

Halfen anchor

Pourstopfixed to deck

Void closer Shear stud

Restraint strap

Deck-bearing

Normal max.cantilever = 125

Pourstopfixed to flange

Halfen channel

Halfen anchor

Shear studRestraint strap

Deck-parallel

For the above fixing details a minimumcantilever is preferable. The detail should alsobe designed to allow the most convenient useof self-tapping screws. The self-tapping screwsholding the edge trim to the deck willnormally be at 300 mm centres. The fixingcontractor should note, when writing hismethod statement, that the encapsulatedHalfen channel increases the weight of theedge trim. (Also, the self-tapping screws fixingthe edge trim to the deck will be of a differentdesign from those fixing the edge trim to thestructural beam.)

Standard3.0 mlength

of Pourstop

Cutlength

ofPourstop

Standard 3.0 m length of Pourstop

Site-applied anchor

Standard bolt anchor


Edge fixing (continued)

Normal Halfen Pourstop is adequate to takethe load of the wet concrete in the minimumcantilever condition. For advice on stiffness forlarger cantilevers, please consult Halfen Limited.

The Pourstop restraint straps are fixed back tothe ribs by self-tapping screws atapproximately 600 mm centres.

With its high strength and adjustability in athin edge, the Halfen Pourstop System offersmany advantages to the concrete contractorand the following trades. Use over many yearshas shown that the detail can be usedeffectively following the guidance givenabove, with minimal disruption to normaltrade practice.

Setting-out plan

Set out Pourstop in 3 metre modules. Butt upas many 3 m lengths as possible before usingsite-applied anchors, code ANK-E, see page 28.(Note that butt joints should be taped toprevent concrete leakage.) Please consultHalfen Limited about column infill pieces.


Short lengths of Pourstop

For point fixing of curtain wall mullions ashort cut length of channel may be needed inthe edge trim. The normal detail is a 350 mmlength of Pourstop, which is set out on site tobutt up against traditional edge trim. Fordetails, please consult Halfen Limited.

Solidconcrete

Vertical channel in edge trim

For brick ties, short lengths of vertical channelcan be factory fixed into edge trim by Halfenat regular centres.

Deep edge trim

Halfen will design deep edge trim/Pourstopdetails to suit specific conditions.

Common applications

The most common applications for HalfenPourstop in the edge of metal deck are:

1) brickwork support: Pourstop provides afixing for brick support systems abovehorizontal soft joints. (An example of brackettype HMA is shown below; solid concretebehind the edge trim is essential, as shown.)

Channel in the top of extra thin decks

Halfen will design anchors to suit theexceptionally thin decks that occur undersome conditions.

2) lift guides: Pourstop allows liftmanufacturers to use traditional details even ina thin slab.

3) pipe risers: with Pourstop the mechanicaland electrical contractor does not have tobuild a secondary structure for pipe support. Soffit fixings

Halfen cast-in channel is also suitable forproviding soffit fixings close to the edge ofthe slab.

Metal deck fixings – variations

Toothed channel

For in/out adjustment of components toothedchannel may be used in metal deck, eithersingly or as a pair. By this means serrations onangles can be avoided, see example below.


Variations

Miscellaneous

Wing anchor

Wing anchors are available for low profiledetails, e.g. where a channel is located in theconcrete casing of a steel beam. The channelload capacity is reduced; please consult HalfenLimited for further information.

Strap anchor

If a narrow beam has a central reinforcementbar, anchors can be made to pass each side ofthe bar. This might occur where fixings formechanical services are required in waffleslabs. Channel may be continuous or shortlengths at node points. This anchor takes thefull allowable load for each channel size up toHTA 40/25.

Single anchor

For an economical fixing similar to a socketbut giving ±15 mm adjustment on an M16bolt, Halfen channel 49/30 is available in an80 mm length with a single anchor.

Reinforcement anchor

Anchors can be manufactured out ofreinforcement for special applications,particularly fixings in the edge of thin slabs.

ANK-E site-applied end anchors

In certain circumstances, when fully fabricatedchannel cannot be supplied, because ofsequence of work or site procedure, stocklengths of channel may be cut on site. Thiswill normally occur where long lengths ofchannel butt together around the perimeter ofa building. The last channel in any bay mayhave a cantilever, which can be finished witha site-applied end anchor (type ANK-E), asshown below.

Channel ‘Wave’ anchor sizes (mm)code (HTA) 70 x 20 x 3 70 x 30 x 3 90 x 30 x 3

50/30 ✓

49/30 ✓

41/22 (HZA) ✓

38/23 (HZA) ✓

40/25 ✓

40/22 ✓

38/17 ✓

28/15 ✓

Channel ‘I’ anchor sizes (mm)code (HTA) length width

72/48 125 50

52/34 125 40

54/33 125 40

‘I’ and ‘wave’ anchors

All channels have bolt anchors as standard,applied by an automated process.

For standard specials and channel fabricationsthe welded anchors may be either hot rolled‘I’ or ‘wave’ anchors, as shown below.

‘I’ and ‘wave’ anchor materials

‘I’ anchors are available in mild steel only.

‘Wave’ anchors are available in both carbonsteel and stainless steel.

Channel End anchor Materialsize code

40/22 ANK-E2 Carbon steel or stainless





Fabricated channel pair

For a typical four-bolt connection channelscan be welded in pairs at the factory prior togalvanising, or supplied in stainless steel.

Fabricated corner

If fixings are required close to an externalcorner, Halfen will supply a fabricated corner,as shown below. The channel is normally ashort length, but can be any length to order.

Captive locking plates

For large adjustments on threaded rod or fordifferential movement Halfen supply captivelocking plates, which are end-entered into thechannel and packed in polystyrene beforedispatch. Once the concrete is cast the captivelocking plate cannot be removed. Threaddiameters are normally M12 or M16 andchannel sizes are normally 49/30, 40/25 or38/17.

Pre-cast application

● channel allows for differential movement● long studding simplifies in/out adjustment.

18

833

Refurbishment application

● channel allows for differential movement● resin anchor inserted into existing wall● captive locking plate in channel● cast-in channel in new concrete.

T-head bolts

The T-head bolts are inserted into the channelat any point along the length after theconcrete is cast.

Short anchors: bolt anchors

For thin concrete units bolt anchors areavailable with shorter dimensions to suit thefollowing channels:HTA–V 40/25HTA–V 40/22HTA–V 38/17HZA–V 41/22

The dimensions of the anchors for all theabove channels are as follows:

Allowable loads may be reduced, pleaseconsult Halfen Limited.

Combi filler

Filler

To keep laitance out of the channel duringcasting a filler is required. Normally,polystyrene is used, but Combi foam strip filleris also available to order.

Magnet fixing

Nail fixing

Fixing with locking plateand set screw M6 or M8

Fixing to formwork

Halfen channels are normally fixed by nailingdirectly to the formwork.

Alternatively, the formwork may be drilled andthe channel fixed using small diameterthreaded rod, typically M6, and a lockingplate. The use of locking plates may easestriking of the formwork.

For steel formwork, magnets are available.

Formwork and filler


Accessories

Channel profiles without anchors

Introduction

These two pages give data on Halfen channelprofiles without anchors.

Plain or slotted back

The channels are available either plain back(HM) or with regularly spaced slotted holes(HL). Plain back channels may be bolted orwelded to the surface of a structure; slottedchannels can be through-fixed or hung fromsuspension rods without the need to drill thechannel. Most channels have smooth lips;some (HZM/HZL) are toothed.

Materials/finishes

Channels are available in either carbon steel orstainless steel. Carbon steel may be hot dipgalvanised or pre-galvanised.

T head bolts/locking plates

Fixings can be made at any point along theHalfen profile using T-head bolts or lockingplates.

Section properties/safe loads

The table opposite gives the sectionalproperties for Halfen plain and slotted backchannels. The loads quoted are for guidanceonly, and are restricted by a working stress of140N/mm2.

Channels welded back-to-back

Halfen will weld channels back-to-back toorder, as below. Please contact Halfen Limited.

Channel profiles – availability (shown thus: ● ) (For load data see table opposite)Channel Plain back (HM), Carbon steel Carbon steel Carbon steel Stainless steeltype slotted back (HL) black/ hot dip galv. pre-galv.

or toothed (-Z-) plain oiled

Hot rolled - surface-fixed channels

72/48 HM ● ● – ●

HL – – – –

52/34 HM ● ● – ●

HL – – – –

50/30 HM ● ● – ●

HL – – – –

40/22 HM ● ● – ●

HL – – – –

38/23 HZM ● ● – –

HZL – – – –

29/20 HZM ● ● – –

HZL – – – –

Cold formed - surface-fixed channels

54/33 HM ● ● – ●

HL – – – –

49/30 HM ● ● – ●

HL – – – –

40/25 HM ● ● – ●

HL – – – –

40/23 HM – – ● –

HL – – – –

38/17 HM ● ● – ●

HL – ● – ●

28/15 HM ● ● – ●

HL ● ● – ●

41/41 HM ● ● ● ●

HL ● ● ● ●

HZM ● ● – ●

HZL ● ● – ●

41/22 HM ● ● – ●

HL ● ● – ●

HZM ● ● – ●

HZL ● ● – ●

50/40 HM ● ● – ●

HL – ● – ●

36/36 HM ● ● – ●

HL ● ● – ●

28/28 HM ● ● ● ●

HL ● ● ● ●

35/50 HM – – ● –

HL – – ● –

36/20 HM ● ● – –

HL – – – –

Channels for special applications

28/12 HM ● ● – –

HL – – – –

20/12 HM ● ● – ●

HL ● ● – ●

26/26 HM – – ● –

HL – – ● –

26/18 HM – – ● –

HL – – ● –


Plain back channels (HM) – properties and performanceChannel Section properties Safe loads W (kN) assuming ‘partial fixity’, eg bolted to type brickwork or concrete, or welded to steel.

Working stress = 140 N/mm2

Section MaximumMass area Ixx Zxx Iyy Zyy Load(kg/m) (cm2) (cm4) (cm3) (cm4) (cm3) L = <150 L= 250 L = 500 L = 750

72/48 HM 8.82 11.23 34.99 14.33 83.07 23.08 27.0 27.0 20.0 13.3

52/34 HM 4.96 6.32 9.42 5.49 24.13 9.19 20.0 15.37 7.69 5.12

50/30 HM 3.23 4.11 5.23 3.55 14.15 5.78 11.0 9.94 4.97 3.31

40/22 HM 2.12 2.70 2.02 1.65 5.85 2.96 7.0 4.62 2.31 1.54

49/30 HM 3.01 3.82 4.35 2.45 13.95 5.58 10.0 6.86 3.43 2.29

40/25 HM 2.08 2.65 2.05 1.39 6.15 3.07 7.0 3.89 1.95 1.30

38/17 HM 1.77 2.26 0.79 0.78 4.05 2.16 4.0 2.18 1.09 0.73

28/15 HM 1.07 1.37 0.38 0.43 1.42 1.02 2.5 1.20 0.60 0.40

50/40 HM 3.35 4.27 8.66 3.97 15.50 6.33 10.0 10.0 5.56 3.71

41/41 HM/HZM 2.62 3.25 6.91 2.91 9.10 4.41 8.0 8.0 4.07 2.72

41/22 HZM 1.79 2.22 1.16 0.92 5.21 2.52 5.5 2.58 1.29 0.86

36/36 HM 2.19 2.79 4.51 2.18 5.85 3.25 6.0 6.0 3.05 2.03

28/28 HM 1.36 1.73 1.70 1.08 2.01 1.49 3.5 3.0 1.51 1.01

For hot rolled toothed channels (code HZM), see page 18.

L (mm)

W

Slotted back channels (HL) – load capacities (simply supported)Channel Safe loads W (kN) assuming simply supported channels, eg hung from drop rods. Working stress = 140 N/mm2

type Mid span loads Multiple loads Uniformly distributed loads

L = 500 L = 1000 L = 1500 L = 500 L = 1000 L = 1500 L = 500 L = 1000 L = 1500

50/40 HL 4.09 2.04 1.36 2.45 1.23 0.82 8.18 4.09 2.73

41/41 HL 3.18 1.59 1.06 1.91 0.95 0.64 6.36 3.18 2.12

36/36 HL 2.21 1.10 0.74 1.32 0.66 0.44 4.41 2.21 1.47

28/28 HL 1.06 0.53 – 0.64 0.32 – 2.13 1.06 –

28/15 HL 0.45 – – 0.27 – – 0.90 – –

W

L (mm)

Slotted back channels (HL) – properties and performanceChannel Section properties Safe loads W (kN) assuming ‘partial fixity’, type eg bolted to brickwork or concrete.

Working stress = 140 N/mm2

SectionMass area Ixx Zxx Iyy Zyy(kg/m) (cm2) (cm4) (cm3) (cm4) (cm3) L = 500 L= 750 L = 1000 L = 1500

50/40 HL 3.15 3.73 7.14 3.65 15.36 6.27 5.11 3.41 2.51 1.70

41/41 HL/HZL 2.46 2.98 6.07 2.84 9.16 4.43 3.98 2.65 1.99 1.33

36/36 HL 2.00 2.42 3.65 1.97 5.78 3.21 2.76 1.84 1.38 0.92

28/28 HL 1.22 1.48 1.33 0.95 1.98 1.47 1.33 0.89 0.67 –

28/15 HL 0.86 1.16 0.32 0.40 1.35 0.98 0.56 0.37 – –

W

L (mm)

WWW

L6

L3

L6

L3

W

L (mm)

X X

Y

Y

X X

Y

Y

Applications


Applications

Heavy channel

Alternative fixing details for mechanical services in tunnels: Halfen channel either adapted for casting into gun-applied concreteor surface-bolted to concrete segment units.

Alternative fixing details for steel beam on top of concrete column,either bolted direct into cast-in channel or using Halfen clamping plates.

Holding down bracket for heavy duty plant or equipment fixed tocast-in channel in top of slab. Fixings also shown in soffit of slab.


Fixings for sun screen/walkway with levelling adjustment, andalso for glazing system with fire stopping.

Adjustable fixing to steelwork for curtain wall mullion at column and cast-in channel in metal deck flooring for intermediate mullion fixings.

Fixing to concrete column/wall for cantilever arms usedin services voids etc.

Cast-in fixings to concrete columnfor steelwork, e.g. structural beamor sheeting rail. Vertical channel iseasy to locate on the reinforcementwhen using slip forming etc.

Toothed channel for high vertical loads

Applications


Applications

Support and restraint details for reconstitutedstone feature band course.

Pre-cast cladding

Typical support and restraint detailsfor pre-cast concrete pilaster.

Cast-in channel and Halfen Panel Support Fixing type FPA–5, bolted to cast-in channel.(Pressure pad and reinforced dowel/socket also shown.)

Support and restraint details for pre-cast concretespandrel or soffit panel.


Pre-cast structural elements for cladding and mechanical applications

Support detail with cast-inchannel for typical storeyheight pre-cast concrete panel.

Cast-in channel support for brick outer leaf,and also restraint detail for insulated panel(with SPA Sandwich Panel Anchor).

Typical holding-down detail for pre-cast planks in process plant.

Cast-in channel support detail for pipework on wall in process plant.

Applications


Applications

Curtain walling and windows

Typical cast-in channel support fixing for base of glazed unit, also showing stone support usingHalfen BODY-anchor BA and stone restraint using Halfen anchor type UHA.

Typical cast-in channel support fixing for window mullion on top of spandrel panel,with alternative fixing position shown on back of panel. (Spandrel panel showncarried on Halfen parapet corbel type BRA-A, set out and adjusted on HTA channel.)

Alternative channel support fixings for cladding mullions,cast into either slab edge or top of slab.


Canopies and balconies

Suggested cast-in channel fixing detail for balustrade upstand.(Waterproofing system omitted for clarity.)

Possible balcony detail using cast-in channel with HGB anchors for balustradeand Halfen HIT insulation/reinforcement system at junction with floor slab.

Support through brickwork for canopy, sunscreen orother feature using Halfen cast-in channel in thestructure and fabricated socket system in the brickwork.Example shows Detan Tension Rod.

Applications


Applications

Masonry fixings

Cast-in channels providing fixings closeto a corner for brick support. VerticalRibslot cast-in channels for brick ties.

Halfen channel for brick ties, screwed through insulation intometal studwork.

Halfen channels welded to RHS to provide brick support, and channel cast intoinsitu slab for brick ties.

Cast-in channel in slab top and soffitproviding fixings for windposts.


Fixings for services etc.

Roof-mounted cradle runwayfixed to Halfen cast-in channels.

Heavy duty lifting eyefixed to soffit withHalfen cast-in channelpair and four bolts.

Cable tray on framing system,showing Halfen Powerclick post fixedto floor slab with cast-in channel.Standard shoe code HCS-VT63 11/2is shown: fabricated componentsavailable to order.

Adjustable cantileverarms fixed to Halfencast-in channels.

Design service

The technical data tables included in thisbrochure are designed to provide a quick andeasy guide for designers and specifiers. Iffurther information is required, however,please do not hesitate to contact the HalfenTechnical Advisory Service.

Testing

Testing procedures have been developed usingchannels cast into concrete, and all Halfenchannel systems have been fully tested. Fordetails, please consult Halfen Limited.

Quality/service

Halfen are committed to meeting therequirements of EN ISO 9001: 2000 andoperate procedures accordingly.

The products are also available as part of theNBS Plus scheme.

Product improvement and development

Halfen’s commitment to continual productdevelopment may result in products beingamended or withdrawn. However, Halfenalways attempt to keep designers of currentprojects aware of any relevant changes.

Hand Arm Vibration

Cast-in channels provide safe, secure fixingsinto concrete without the need for drilling,helping specifiers and contractors meet theirresponsibilities under the new Control ofVibration at Work Regulations (effective July 2005).

The regulations define the minimum healthand safety requirements regarding exposure ofworkers to vibration risk, and are aimed atminimising the effects of Hand Arm Vibrationand in particular, Vibration White Finger - themost commonly prescribed disease within theconstruction industry under the IndustrialInjuries scheme.

Cast-in channels are a long establishedmethod of fixing to concrete which completelyavoids the risks of vibration associated withother methods such as drilled fixings, and alsohas the benefits of no noise or dust beingcreated on-site.

Halfen has produced a ‘white paper’explaining in greater detail the issue and itseffects, and also HSE guidance on reducingvibration risks. For copies, please contactHalfen.

Halfen Limited

Humphrys Road Woodside Estate Dunstable LU5 4TP

Tel: +44 (0)8705 316300 Fax: +44 (0)8705 316304

Email: [email protected] Web: www.halfen.co.uk

Brickwork support – brackets and angles

Summary of other products from Halfen Deha:

FPA Cladding Panel Support System

Lutz stone anchorsHIT Insulated Balcony System

HBS and HBM Reinforcement Coupler System Kwikastrip Reinforcement Continuity System

Halfen Castin Channel Fixings

Documents

Transcript of Halfen Castin Channel Fixings