C06. S06. P02 – P20 Loadbearing timber joist floors/media/Files/British... · 2019. 6. 12. ·...
Transcript of C06. S06. P02 – P20 Loadbearing timber joist floors/media/Files/British... · 2019. 6. 12. ·...
C06.S06.P02–P20 Loadbearingtimberjoistfloors IncludingC06.S01.P02–P08
Floorsandceilingsintroduction
!Thissectionincludesupdatedinformation,addedsinceitwasfirst
publishedinDecember2015.
Last updated 06/12/2019
british-gypsum.com
Floors and ceilingsThis section details floors and ceilings systems which cover a multitude of performance requirements in all sectors
C06
Intr
odu
ctio
nFl
oors
an
d ce
ilin
gs
C06. S01. P02 0115 945 6123 [email protected]
C06Introdu
ctionFloors an
d ceilings
Floors and ceilings
British Gypsum offers a full range of specifications from simple plasterboard ceilings through to a range of gypsum-based, acoustic suspended ceilings and lay-in grid systems. They cover all building categories, including private and social housing, apartments, healthcare, educational facilities, recreational and industrial properties in both new-build and refurbishment and can satisfy the most demanding performance requirements.
When specifying floor and ceiling solutions, a number of performance characteristics are normally used to determine the required solution. Depending on the project or construction type, these performance parameters could be set by minimum regulatory standards, or a client or customer requirement, for buildings that offer the highest standards of performance and comfort.
Our quick-reference floors and ceilings system guide, below, allows you to simply select the performance categories of interest and identify the British Gypsum floor and ceiling systems which best satisfy your project requirements.
Fire
performancemins
Installed cavity depth
mm
Acoustic performance
System PageRwdB Rw + C
trdB Ln,w
dB αw
30 - 120 ≥100 56 - 66 50 - 55 68 - 50 0.35 - 0.85 CasoLine mf C06. S02. P02
- ≥100 - - - 0.35 - 0.852 CasoLine curve C06. S03. P02
30 - 90 25 - 175 52 - 63 50 66 - 55 0.35 - 0.85 GypLyner universal C06. S04. P02
30 - 90 - 54 - 63 47 - 51 63 - 55 - GypFloor silent1 C06. S05. P02
30 - 120 - 36 - 66 50 - 55 78 - 48 - Timber floors C06. S06. P02
30 - 60 - - - - - Cavity barriers C06. S07. P02
1 Where the floor can only be accessed from above, the fire and accoustic performances can be upgraded with the GypFloor silent system.2 Indicative first test performance only.
C06. S01. P03 british-gypsum.com
C06
Intr
odu
ctio
nFl
oors
an
d ce
ilin
gs
Good practice specification guidance
British Gypsum’s systems are designed and tested to meet every performance requirement and are fully supported by our SpecSure® lifetime system warranty.
This means that when our systems are installed following our guidance they will achieve every performance claim we make, and if they don’t then we’ll put it right. To maximise the performance achieved on site, consider the following good practice specification guidance:
— Consider flanking transmission at the design stage and ensure construction detailing is specified to eliminate, or at least to minimise, any downgrading of the acoustic performance. The sound insulation values quoted in system performance tables are laboratory values and the practicalities of construction will mean that acoustic performances measured in the laboratory will be difficult to achieve on site
— Small openings such as gaps, cracks or holes will conduct airborne sounds and can significantly reduce the sound insulation of a construction. For optimum sound insulation a construction must be airtight
— When designing spaces requiring separation by sound insulating floors and ceilings abutting structural steelwork, consideration should be given to the potential loss of sound insulation performance through the steelwork
Acoustic performance
Table1–RecommendedlaboratoryperformancetomeetrequirementsofBuildingRegulationsApprovedDocumentE(EnglandandWales)
Where applicable Minimum airborne
sound insulation
DnT,w
+ Ctr (site test result)
Recommended
performance Rw
+ Ctr
(laboratory test result)
Maximum impact
sound transmission
L’nT,w
(site test result)
Recommended
performance
Ln,w
(laboratory test result)
Separating walls between new homes 45dB 54dB - -
Separating walls between purpose-built
rooms for residential purposes
43dB 52dB - -
Separating walls between rooms created by
a change of use or conversion
43dB 52dB - -
Separating floors between new homes and
purpose-built rooms for residential purposes
45dB 54dB 62dB 57dB - 52dB
(depending on
construction method)
Separating floors between rooms created by
a change of use or conversion
43dB 52dB 64dB 59dB - 54dB
(depending on
construction method)
Table2–RecommendedlaboratoryperformancetomeetrequirementsofTechnicalHandbookSection5(Scotland)
Where applicable Minimum airborne
sound insulation
DnT,w
(site test result)
Recommended
performance Rw
(laboratory test result)
Maximum impact
sound transmission
L’nT,w
(site test result)
Recommended
performance
Ln,w
(laboratory test result)
Separating walls between new homes,
purpose-built rooms for residential purposes
and conversions (not including traditional
buildings1)
56dB 63dB - -
Separating walls between rooms created by
a change of use or conversion (traditional
buildings1)
53dB 60dB - -
Separating floors between new homes,
purpose-built rooms for residential purposes
and conversions (not including traditional
buildings 1)
56dB 63dB 56dB 51dB - 46dB
(depending on
construction method)
Separating floors between rooms created by
a change of use or conversion (traditional
buildings1)
53dB 60dB 58dB 53dB - 48dB
(depending on
construction method)
1 Definition of traditional buildings.
A building or part of a building of a type constructed before or around 1919:
a) using construction techniques that were commonly in use before 1919; and
b) with permeable components, in a way that promotes the dissipation of moisture from the building fabric.
C06. S01. P04 0115 945 6123 [email protected]
C06Introdu
ctionFloors an
d ceilings
Gyptone quattro 46 (plenum depth 400mm)
Gyptone quattro 46 (plenum depth 400mm plus
100mm Isover Spacesaver Ready-Cut)
Practical absorption coefficient α
p
125 250 500 1k 2k 4k αW
AC1 NRC2
0.65 0.60 0.55 0.45 0.40 0.35 0.45(L) D 0.50
0.60 0.60 0.65 0.55 0.45 0.40 0.50(L) D 0.55
Gyptone quattro 42 (plenum depth 50mm)3
Practical absorption coefficient α
p
125 250 500 1k 2k 4k αW
AC1 NRC2
0.20 0.40 0.60 0.60 0.45 0.40 0.50 D 0.55
Gyptone quattro 41 (plenum depth 187mm)
Practical absorption coefficient α
p
125 250 500 1k 2k 4k αW
AC1 NRC2
0.50 0.70 0.80 0.70 0.60 0.55 0.65 C 0.70
System reference C10A014
C10A015
QUATTRO 46 Sound absorption coefficient αp
0.0
0.2
0.4
0.6
0.8
1.0
125 250 500 1000 2000 4000
Prac
tica
l abs
orpt
ion
coe
ffic
ien
t α p
Frequency (Hz)
Gyptone performance
Table 3 – Sound absorption data for Gyptone boards
1 AC - Absorption Class.2 NRC - Noise Reduction Coefficient.3 Due to installation limitations the minimum cavity size that can be constructed with CasoLine mf or CasoLine curve system is 100mm. The sound absorption
performance for these systems is estimated to be equivalent to that of the same system built with a 50mm plenum.
All products have been tested to BS EN 20354 and ISO 354. The single figure rating practical sound absorption coefficient αw
is calculated in accordance
with EN ISO 11654. Suffix letters indicate where performance is limited at either low, medium or high frequencies.
QUATTRO 41
System reference C10A091
Sound absorption coefficient αp
0.0
0.2
0.4
0.6
0.8
1.0
125 250 500 1000 2000 4000
Prac
tica
l abs
orpt
ion
coe
ffic
ien
t α p
Frequency (Hz)
QUATTRO 42 Sound absorption coefficient αp
0.0
0.2
0.4
0.6
0.8
1.0
125 250 500 1000 2000 4000
Prac
tica
l abs
orpt
ion
coe
ffic
ien
t α p
Frequency (Hz)
System reference C10A110
C06. S01. P05 british-gypsum.com
C06
Intr
odu
ctio
nFl
oors
an
d ce
ilin
gs
Gyptone sixto 63 (plenum depth 200mm)
Practical absorption coefficient α
p
125 250 500 1k 2k 4k αW
AC1 NRC2
0.35 0.60 0.70 0.60 0.55 0.55 0.60 C 0.60
Gyptone line 6 (plenum depth 400mm)
Gyptone line 6 (plenum depth 400mm plus
100mm Isover Spacesaver Ready-Cut)
Practical absorption coefficient α
p
125 250 500 1k 2k 4k αW
AC1 NRC2
0.70 0.65 0.60 0.50 0.40 0.35 0.45(L) D 0.55
0.70 0.70 0.65 0.65 0.50 0.45 0.55(L) D 0.65
Gyptone quattro 47 (plenum depth 400mm)
Gyptone quattro 47 (plenum depth 400mm plus
50mm Isover Acoustic Partition Roll (APR 1200))
Practical absorption coefficient α
p
125 250 500 1k 2k 4k αW
AC1 NRC2
0.45 0.50 0.45 0.40 0.30 0.25 0.35(L) D 0.40
0.50 0.55 0.50 0.40 0.30 0.30 0.40(L) D 0.45
Gyptone performance (continued)
Table 3 (continued) – Sound absorption data for Gyptone boards
System reference C10A016
C10A017
QUATTRO 47 Sound absorption coefficient αp
0.0
0.2
0.4
0.6
0.8
1.0
125 250 500 1000 2000 4000
Prac
tica
l abs
orpt
ion
coe
ffic
ien
t α p
Frequency (Hz)
System reference C10A001
C10A002
LINE 6 Sound absorption coefficient αp
0.0
0.2
0.4
0.6
0.8
1.0
125 250 500 1000 2000 4000
Prac
tica
l abs
orpt
ion
coe
ffic
ien
t α p
Frequency (Hz)
System reference C10A115
SIXTO 63 Sound absorption coefficient αp
0.0
0.2
0.4
0.6
0.8
1.0
125 250 500 1000 2000 4000
Prac
tica
l abs
orpt
ion
coe
ffic
ien
t α p
Frequency (Hz)
1 AC - Absorption Class.2 NRC - Noise Reduction Coefficient.
All products have been tested to BS EN 20354 and ISO 354. The single figure rating practical sound absorption coefficient αw
is calculated in accordance
with EN ISO 11654. Suffix letters indicate where performance is limited at either low, medium or high frequencies.
C06. S01. P06 0115 945 6123 [email protected]
C06Introdu
ctionFloors an
d ceilings
Rigitone performance
Table 4 – Sound absorption data for Rigitone boards
1 AC - Absorption Class.2 NRC - Noise Reduction Coefficient.3 Due to installation limitations the minimum cavity size that can be constructed with CasoLine mf or CasoLine curve system is 100mm. The sound absorption
performance for these systems is estimated to be equivalent to that of the same system built with a 50mm plenum.
All products have been tested to BS EN 20354 and ISO 354. The single figure rating practical sound absorption coefficient αw
is calculated in accordance
with EN ISO 11654. Suffix letters indicate where performance is limited at either low, medium or high frequencies.
8-15-20 SUPER Sound absorption coefficient αp
Prac
tica
l abs
orpt
ion
coe
ffic
ien
t α p
Frequency (Hz)
System reference C10A058
C10A059
C10A069
Rigitone 8-15-20 super (plenum depth 50mm)3
Rigitone 8-15-20 super (plenum depth 200mm)
Rigitone 8-15-20 super (plenum depth 200mm plus
50mm Isover Frame Batt 32)
Practical absorption coefficient α
p
125 250 500 1k 2k 4k αW
AC1 NRC2
0.15 0.40 0.70 0.75 0.45 0.40 0.50(M) D 0.55
0.35 0.75 0.75 0.55 0.40 0.30 0.45(LM) D 0.60
0.60 0.85 0.80 0.65 0.45 0.30 0.45(LM) D 0.70
Rigitone 8/18 (plenum depth 50mm)3
Rigitone 8/18 (plenum depth 200mm)
Rigitone 8/18 (plenum depth 200mm plus 50mm Isover Frame Batt 32)
Practical absorption coefficient α
p
125 250 500 1k 2k 4k αW
AC1 NRC2
0.10 0.30 0.65 0.85 0.55 0.30 0.50(M) D 0.55
0.35 0.75 0.90 0.60 0.50 0.40 0.55(LM) D 0.70
0.60 0.95 0.95 0.80 0.70 0.50 0.70(LM) C 0.85
System reference C10A036
C10A037
C10A060
8/18 Sound absorption coefficient αp
0.0
0.2
0.4
0.6
0.8
1.0
125 250 500 1000 2000 4000
Prac
tica
l abs
orpt
ion
coe
ffic
ien
t α p
Frequency (Hz)
System reference C10A125
C10A124
C10A126
8/18 Q Sound absorption coefficient αp
0.0
0.2
0.4
0.6
0.8
1.0
125 250 500 1000 2000 4000
Prac
tica
l abs
orpt
ion
coe
ffic
ien
t α p
Frequency (Hz)
Rigitone 8/18 q (plenum depth 50mm)3
Rigitone 8/18 q (plenum depth 200mm)
Rigitone 8/18 q (plenum depth 200mm plus
25mm Isover Acoustic Partition Roll (APR 1200))
Practical absorption coefficient α
p
125 250 500 1k 2k 4k αW
AC1 NRC2
0.15 0.25 0.60 0.85 0.65 0.50 0.55(M) D 0.60
0.40 0.65 0.80 0.60 0.55 0.50 0.60 C 0.65
0.40 0.70 0.85 0.80 0.80 0.70 0.80 B 0.80
0.0
0.2
0.4
0.6
0.8
1.0
125 250 500 1000 2000 4000
C06. S01. P07 british-gypsum.com
C06
Intr
odu
ctio
nFl
oors
an
d ce
ilin
gs
Rigitone performance (continued)
Table 4 (continued) - Sound absorption data for Rigitone boards
1 AC – Absorption Class.2 NRC – Noise Reduction Coefficient.3 Due to installation limitations the minimum cavity size that can be constructed with CasoLine mf or CasoLine curve system is 100mm. The sound absorption
performance for these systems is estimated to be equivalent to that of the same system built with a 50mm plenum.
All products have been tested to BS EN 20354 and ISO 354. The single figure rating practical sound absorption coefficient αw
is calculated in accordance
with EN ISO 11654. Suffix letters indicate where performance is limited at either low, medium or high frequencies.
10/23
System reference C10A038
C10A039
C10A061
Sound absorption coefficient αp
0.0
0.2
0.4
0.6
0.8
1.0
125 250 500 1000 2000 4000
Prac
tica
l abs
orpt
ion
coe
ffic
ien
t α p
Frequency (Hz)
Rigitone 10/23 (plenum depth 50mm)3
Rigitone 10/23 (plenum depth 200mm)
Rigitone 10/23 (plenum depth 200mm plus
50mm Isover Frame Batt 32)
Practical absorption coefficient α
p
125 250 500 1k 2k 4k αW
AC1 NRC2
0.10 0.25 0.65 0.90 0.55 0.25 0.45(M) D 0.60
0.35 0.70 0.85 0.60 0.50 0.35 0.50(LM) D 0.65
0.65 0.95 0.90 0.80 0.65 0.45 0.65(LM) C 0.80
12-20/66
System reference C10A042
C10A043
C10A063
Sound absorption coefficient αp
0.0
0.2
0.4
0.6
0.8
1.0
125 250 500 1000 2000 4000
Prac
tica
l abs
orpt
ion
coe
ffic
ien
t α p
Frequency (Hz)
Rigitone 12-20/66 (plenum depth 50mm)3
Rigitone 12-20/66 (plenum depth 200mm)
Rigitone 12-20/66 (plenum depth 200mm plus
50mm Isover Frame Batt 32)
Practical absorption coefficient α
p
125 250 500 1k 2k 4k αW
AC1 NRC2
0.10 0.25 0.60 0.85 0.55 0.30 0.45(M) D 0.55
0.40 0.70 0.85 0.60 0.50 0.35 0.50(LM) D 0.65
0.55 0.95 1.00 0.85 0.70 0.55 0.70(LM) C 0.90
Rigitone 12/25 (plenum depth 50mm)3
Rigitone 12/25 (plenum depth 200mm)
Rigitone 12/25 (plenum depth 200mm plus
50mm Isover Frame Batt 32)
Practical absorption coefficient α
p
125 250 500 1k 2k 4k αW
AC1 NRC2
0.05 0.25 0.65 0.85 0.65 0.50 0.55(M) D 0.60
0.35 0.75 0.90 0.65 0.55 0.40 0.55(LM) D 0.70
0.55 0.95 0.95 0.85 0.70 0.50 0.70(LM) C 0.85
12/25
System reference C10A127
C10A129
C10A128
Sound absorption coefficient αp
0.0
0.2
0.4
0.6
0.8
1.0
125 250 500 1000 2000 4000
Prac
tica
l abs
orpt
ion
coe
ffic
ien
t α p
Frequency (Hz)
C06. S01. P08 0115 945 6123 [email protected]
C06Introdu
ctionFloors an
d ceilings
Rigitone performance (continued)
Table 4 (continued) – Sound absorption data for Rigitone boards
1 AC – Absorption Class.2 NRC – Noise Reduction Coefficient.3 Due to installation limitations the minimum cavity size that can be constructed with CasoLine mf or CasoLine curve system is 100mm. The sound absorption
performance for these systems is estimated to be equivalent to that of the same system built with a 50mm plenum.
All products have been tested to BS EN 20354 and ISO 354. The single figure rating practical sound absorption coefficient αw
is calculated in accordance
with EN ISO 11654. Suffix letters indicate where performance is limited at either low, medium or high frequencies.
Rigitone 12/25 q (plenum depth 50mm)3
Rigitone 12/25 q (plenum depth 200mm)
Rigitone 12/25 q (plenum depth 200mm plus
50mm Isover Frame Batt 32)
Practical absorption coefficient α
p
125 250 500 1k 2k 4k αW
AC1 NRC2
0.10 0.30 0.65 0.90 0.80 0.60 0.60(M) C 0.65
0.35 0.75 0.90 0.70 0.65 0.50 0.65(LM) C 0.75
0.55 0.90 0.95 0.85 0.85 0.65 0.85(L) B 0.90
Rigitone 15/30 (plenum depth 50mm)3
Rigitone 15/30 (plenum depth 200mm)
Rigitone 15/30 (plenum depth 200mm plus
50mm Isover Frame Batt 32)
Practical absorption coefficient α
p
125 250 500 1k 2k 4k αW
AC1 NRC2
0.10 0.25 0.60 0.85 0.55 0.30 0.45(M) D 0.55
0.35 0.70 0.85 0.60 0.50 0.35 0.50(LM) D 0.65
0.60 0.95 1.00 0.85 0.70 0.55 0.70(LM) C 0.85
System reference C10A040
C10A041
C10A062
15/30 Sound absorption coefficient αp
0.0
0.2
0.4
0.6
0.8
1.0
125 250 500 1000 2000 4000
Prac
tica
l abs
orpt
ion
coe
ffic
ien
t α p
Frequency (Hz)
System reference C10A131
C10A130
C10A132
12/25 Q Sound absorption coefficient αp
0.0
0.2
0.4
0.6
0.8
1.0
125 250 500 1000 2000 4000
Prac
tica
l abs
orpt
ion
coe
ffic
ien
t α p
Frequency (Hz)
C06
Load
bear
ing
tim
ber
jois
t fl
oors
Floo
rs a
nd
ceili
ngs
Loadbearing timber joist floorsInternal and separating floor systems
C06. S06. P02 0115 945 6123 [email protected]
C06Loadbearin
g timber joist floors
Floors and ceilin
gs
Refer to C01. S01. P07
System can be skim finished with
ThistlePro PureFinish. Refer to C02. S01. P49
Loadbearing timber joist floors
Timber joists are widely used within internal floor and separating floor construction, both in residential and commercial applications. Our range of timber joist floor solutions include cavity insulation, high-performance Gyproc plasterboards and Gypframe sound insulating bars. Our solutions maximise acoustic and fire performance, to both meet, and significantly exceed, the requirements of Building Regulations, for new build and refurbishment projects.
Key benefits
—WhenGyprocplasterboardsaredirectly fixed,defectsareminimisedusing BritishGypsumDrywallScrews
—Nailpoppingiseliminatedthroughtheuse ofGypframeRB1ResilientBarand GypframeRB2SureFixBar
—Significantlyenhancedacousticperformance isachievedwhenGypframeRB1ResilientBar isspecifiedalongsideGyprocSoundBloc plasterboardlinings
You may also be interested in...
CasoLinemfAsuspendedceilingsystem,capableofprovidingupto120minutesfireresistance.Suitableforinternaldryliningapplicationtotimberjoistfloors.ThefullyconcealedgridandceilingliningcanbeusedinconjunctionwithGyprocplasterboardsandGyptoneorRigitoneacousticceilingboardstocreateaseamless,monolithicappearance.
Refer to C06. S02.P02 – CasoLinemf.
mins30 120
Rw
dB36 66
Ln,w
dB78 48
C06. S06. P03 british-gypsum.com
C0
6Lo
adbe
arin
g ti
mbe
r jo
ist
floo
rsFl
oors
an
d ce
ilin
gs
Loadbearing timber joist floors performance Ceiling directly fixed to new or existing solid timber joist floors
Table 1a - Solutions to satisfy requirements of BS EN 1365-2
1
Detail Nominal
floor
depth
mm
Board
type
Ceiling lining
thickness
mm
Noggings
required
Maximum
loadbearing
ratio
Sound insulation System
referenceAirborne
Rw dB
Impact
Ln,w dB
30 minutes fire resistance
1 227 Glasroc F multiboard 1 x 10 Yes2 100% - - G106036
1 232 Gyproc WallBoard 1 x 15 Yes3 100% 40 - C106029
4 277 Gyproc WallBoard 1 x 15 Yes3 -4% 41 - C206015
60 minutes fire resistance
2 237 Glasroc F multiboard 2 x 10 Yes2 100% - - G106022
2 242 Gyproc FireLine 2 x 12.5 Yes2 100% 40 76 C016009
2 245Gyproc WallBoard (inner layer)
+ Gyproc FireLine (outer layer)1 x 12.5 + 1 x 15 Yes3 100% 40 76 C016008
90 minutes fire resistance
3 255 Gyproc FireLine 3 x 12.5 Yes2 100% 40 - C016012
22mm t&g1 (softwood or chipboard)
floor boarding over minimum
195mm x 38mm timber joists at
600mm centres. Noggings and
linings as in table.
22mm t&g1 (softwood or chipboard)
floor boarding over minimum 195mm x
38mm timber joists at 600mm centres.
Noggings and linings as in table.
2
For further assistance in choosing the right solution for your project, try the White Book System Selector; an online tool that enables quick and
easy filtering by performance criteria. It provides system specific information downloads including BIM (Revit) objects. Go to british-gypsum.com
1 Fornont&gfloors,overlaywith6mmplywoodandensurealljointsarestaggered.2 Atceilingperimeterandtosupportouterlayerceilingboardjoints(38mmx38mmminimum).3 Atceilingperimeteronly.4 Floortestedwithauniformlydistributedloadof1.5kN/m2
5 Joistdescription:240mmdeep‘I’joistwith45mmx36mmdeeplaminatedveneerlumber(LVL)flangesand10mmthickorientedstrandboard(OSB3)web.
Consultmanufacturersdirectlyforfireresistancesubstantiationforothertypesof‘I’joistnotdescribedabove.
Thefireresistanceandsoundinsulationperformancesareforimperforatepartitions,wallsandceilingsincorporatingboardswithalljointstapedand
filled,orskimmedaccordingtoBritishGypsum’srecommendations.ThequotedperformancesareachievedonlyifBritishGypsumandSaint-GobainIsover
componentsareusedthroughout,andtheCompany’sfixingrecommendationsarestrictlyobserved.Anyvariationinthespecificationsshouldbecheckedwith
BritishGypsum.
Whereboardsarefixeddirecttotimberjoists,BritishGypsumDrywallScrewsshouldbeusedasopposedtonail-fixingtominimisetheriskoffixing
defectsoccurring.
22mm t&g1 (softwood or chipboard)
floor boarding over minimum 195mm x
38mm timber joists at 600mm centres
(maximum). Noggings and linings as
in table.
3
Handy hint
ForfurtherinformationregardingBuildingRegulationsacousticperformancerequirements.
Refer to C02. S01. P08 – Building acoustics
For details of when
to specify fire
resistance using EN
Refer to C02. S01. P05
22mm t&g1 (softwood or chipboard)
floor boarding over 240mm deep
timber ‘I’ joists5 at 600mm centres.
Noggings and linings as in table.
4
C06. S06. P04 0115 945 6123 [email protected]
C06
Loadbearing tim
ber joist floorsFloors an
d ceilings
Loadbearing timber joist floors performance (continued)
Ceiling directly fixed to new or existing solid timber joist floors
2
22mm t&g1 (softwood or chipboard)
floor boarding over minimum
195mm x 38mm timber joists at 600mm
centres. Noggings and linings as in table.
22mm t&g1 (softwood or chipboard)
floor boarding over minimum
195mm x 38mm timber joists at 450mm
centres. Noggings and linings as in table.
22mm t&g1 (softwood or chipboard)
floor boarding over minimum
195mm x 38mm timber joists at
600mm centres. Noggings and
linings as in table.
3
22mm t&g1 (softwood or chipboard)
floor boarding over minimum
195mm x 38mm timber joists at
450mm centres. Noggings and
linings as in table.
22mm t&g1 (softwood or chipboard) floor
boarding over minimum 195mm x 50mm
timber joists at 450mm centres. Noggings
and linings as in table.
22mm t&g1 (softwood or chipboard)
floor boarding over 240mm deep
timber ‘I’ joists5 at 600mm centres.
Noggings and linings as in table.
Detail Nominal
floor
depth
mm
Board
type
Ceiling lining
thickness
mm
Noggings
required
Maximum
loadbearing
ratio
Sound insulation System
referenceAirborne
Rw dB
Impact
Ln,w dB
30 minutes fire resistance
2 230 Gyproc WallBoard 1 x 12.5 Yes2 60% 36 - C014003
1 230 Gyproc FireLine 1 x 12.5 Yes3 60% 38 - C016004
232 Gyproc WallBoard 1 x 15 Yes2 100% 40 - C106029
6 278 Gyproc WallBoard 1 x 15 Yes2 60%4 41 - C206015
60 minutes fire resistance
3 242 Gyproc FireLine 2 x 12.5 Yes3 100% 40 76 C016009
4 245Gyproc WallBoard (inner layer)
+ Gyproc FireLine (outer layer)1 x 12.5 + 1 x 15 Yes2 100% 40 76 C016008
5 247 Gyproc WallBoard 2 x 15 Yes3 60% 40 76 C016006
5 249Gyproc Plank (inner layer)
+ Gyproc WallBoard (outer layer)1 x 19 + 1 x 12.5 Yes2 60% 40 75 C016007
90 minutes fire resistance
5 247 Gyproc FireLine 2 x 15 Yes3 60% 40 78 C014011
For further assistance in choosing the right solution for your project, try the White Book System Selector; an online tool that enables quick and
easy filtering by performance criteria. It provides system specific information downloads including BIM (Revit) objects. Go to british-gypsum.com
1 Fornont&gfloors,overlaywith6mmplywoodandensurealljointsarestaggered.2 Atceilingperimeteronly.3 Atceilingperimeterandtosupportouterlayerceilingboardjoints.4 Floortestedwithauniformlydistributedloadof1.5kN/m2
5 Joistdescription:240mmdeep‘I’joistwith45mmx36mmdeeplaminatedveneerlumber(LVL)flangesand10mmthickorientedstrandboard(OSB3)web.
Consultmanufacturersdirectlyforfireresistancesubstantiationforothertypesof‘I’joistnotdescribedabove.
Thefireresistanceandsoundinsulationperformancesareforimperforatepartitions,wallsandceilingsincorporatingboardswithalljointstapedand
filled,orskimmedaccordingtoBritishGypsum’srecommendations.ThequotedperformancesareachievedonlyifBritishGypsumandSaint-GobainIsover
componentsareusedthroughout,andtheCompany’sfixingrecommendationsarestrictlyobserved.Anyvariationinthespecificationsshouldbecheckedwith
BritishGypsum.
Whereboardsarefixeddirecttotimberjoists,BritishGypsumDrywallScrewsshouldbeusedasopposedtonail-fixingtominimisetheriskoffixing
defectsoccurring.
Allthe30and60minutespecificationsintable1bcanbeusedontheundersideofanexistinglathandplasterceilingprovidedtheexistingceilingis
supportedbychickenwiresecurelyfixedtothejoistsandcounterbattenedwithminimum38mmx38mmtimberat600mmcentres,withnoggingstosupport
thelongedgesoftheouterlayerboard.
1
1 4
65
Table 1b - Solutions to satisfy the requirements of BS 476: Part 8: 1972 or BS 476: Part 21: 1987
For details of when
to specify fire
resistance using BS
Refer to C02. S01. P05
C06. S06. P05 british-gypsum.com
C0
6Lo
adbe
arin
g ti
mbe
r jo
ist
floo
rsFl
oors
an
d ce
ilin
gs
Loadbearing timber joist floors performance (continued)
Non-combustible ceiling linings directly fixed to new or existing solid timber joist floors
1 2
18mm t&g1 (softwood or chipboard) floor boarding over
minimum 195mm x 38mm timber joists at 450mm
centres with suitable noggings between joists to support
board edges. Linings as in table.
22mm t&g1 (softwood or chipboard) floor boarding over
minimum 195mm x 38mm timber joists at 600mm
centres with suitable noggings between joists to support
board edges. Linings as in table.
3
22mm t&g1 (softwood or chipboard) floor boarding over
minimum 195mm x 47mm timber joists at 600mm
centres with suitable noggings between joists to support
board edges. Linings as in table.
4
Table 2 – Solutions to satisfy the requirements of BS 476: Part 8: 1972 or BS 476: Part 21: 1987
Detail Nominal
floor
depth
mm
Board
type
Ceiling
lining
thickness
mm
Noggings
required
System
reference
30 minutes fire resistance
1 219 Glasroc F multiboard 1 x 6 Yes3 G104019
2 227 Glasroc F multiboard 1 x 10 Yes3 G106036
2 230 Glasroc F multiboard 1 x 12.5 Yes3 G106021
60 minutes fire resistance
2 232 Glasroc F firecase (screw-fixed)2 1 x 15 Yes3 G106025
4 233 80mm wide Glasroc F multiboard strip + Glasroc F multiboard 1 x 10 + 1 x 10 No G104024
3 237 Glasroc F multiboard 2 x 10 Yes3 G106022
5 237 80mm wide Glasroc F multiboard strip + Glasroc F multiboard 1 x 10 + 1 x 10 Yes3 G106046
For further assistance in choosing the right solution for your project, try the White Book System Selector; an online tool that enables quick and
easy filtering by performance criteria. It provides system specific information downloads including BIM (Revit) objects. Go to british-gypsum.com
1 Fornont&gfloors,overlaywith6mmplywoodandensurealljointsarestaggered.2 Use58mmGlasrocFfirecaseScrewsat150mmcentres,andincreasethewidthofthetimberjoistsatthelocationofboardendsusing25mmx25mmtimber
battens.3 Atceilingperimeterandtosupportouterlayerceilingboardjoints(38mmx38mmminimum).
Thefireresistanceandsoundinsulationperformancesareforimperforatepartitions,wallsandceilingsincorporatingboardswithalljointstapedand
filled,orskimmedaccordingtoBritishGypsum’srecommendations.ThequotedperformancesareachievedonlyifBritishGypsumandSaint-GobainIsover
componentsareusedthroughout,andtheCompany’sfixingrecommendationsarestrictlyobserved.Anyvariationinthespecificationsshouldbecheckedwith
BritishGypsum.
Whereboardsarefixeddirecttotimberjoists,BritishGypsumDrywallScrewsshouldbeusedasopposedtonail-fixingtominimisetheriskoffixing
defectsoccurring.
5
18mm t&g1 (softwood or chipboard) floor boarding
over minimum 195mm x 50mm timber joists at
400mm centres. 30mm stone mineral wool (64kg/m3)
in the cavity. Linings as in table.
22mm t&g1 (softwood or chipboard) floor boarding
over minimum 195mm x 50mm timber joists at
600mm centres with suitable noggings between joists
to support board edges. 60mm stone mineral wool
(23kg/m3) in the cavity. Linings as in table.
For details of when
to specify fire
resistance using BS
Refer to C02. S01. P05
C06. S06. P06 0115 945 6123 [email protected]
C06
Loadbearing tim
ber joist floorsFloors an
d ceilings
Loadbearing timber joist floors performance (continued)
New or replacement ceilings to solid timber joists
Table 3 – Solutions to satisfy the requirements of BS 476: Part 21: 1987
Detail Ceiling specification Joist centres Joist width (minimum)
mm
System
reference
60 minutes fire resistance
1Ribbed metal lath1 with 13mm Thistle BondingCoat and
2mm Thistle MultiFinish600 44 C016016
1 Ribbed metal lath1 with 19mm Thistle Universal OneCoat 600 38 C016017
120 minutes fire resistance
1Ribbed metal lath1 with 19mm Thistle BondingCoat and
2mm Thistle MultiFinish600 48 C016045
For further assistance in choosing the right solution for your project, try the White Book System Selector; an online tool that enables quick and
easy filtering by performance criteria. It provides system specific information downloads including BIM (Revit) objects. Go to british-gypsum.com
1 Whereplasterisappliedtoribbedmetallath,theplasterthicknessismeasuredfromthefaceofthelath,andthelathshouldbeinstalledinaccordancewith
themanufacturers’recommendations.With120minutesfireresistanceconstruction,themetallathisindependentlyfixedwithwiresupportsfromthejoist
sides.RefertoC07.S02.P06–Plastersystems,design,Howtoapplyplastertometallath.
ThistleplasterisclassifiedA1(exceptThistleProDuraFinishwhichisA2-s1,d0)inaccordancewithBS EN 13501-1: 2002.
1
21mm t&g (softwood or chipboard) floor boarding over
timber joists at 600mm centres with suitable timber
noggings between joists to support metal lathing.
Plaster to metal lathing as in table.
For details of when
to specify fire
resistance using BS
Refer to C02. S01. P05
C06. S06. P07 british-gypsum.com
C0
6Lo
adbe
arin
g ti
mbe
r jo
ist
floo
rsFl
oors
an
d ce
ilin
gs
Detail Nominal
floor
depth
mm
Board
type
Ceiling lining
thickness
mm
Maximum
loadbearing
ratio
Sound insulation System
referenceAirborne
Rw dB
Impact
Ln,w dB
60 minutes fire resistance
1 258 Gyproc FireLine 2 x 12.5 100% 45 72 C016031
2 263 Gyproc SoundBloc 2 x 15 100% 54 60 C206009
Loadbearing timber joist floors performance (continued)
Ceiling indirectly fixed to new or existing solid timber joist floors
1
Table 4a - Solutions to satisfy the requirements of BS EN 1365-2
22mm t&g1 (softwood or chipboard) floor
boarding over minimum 195mm x 38mm
timber joists at 600mm centres.
Gypframe RB1 Resilient Bars fixed to
underside of joists at 450mm centres and
at perimeter with ceiling linings as in
table fixed into the bars only.
22mm t&g1 (softwood or chipboard) floor
boarding over minimum 195mm x 38mm
timber joists at 600mm centres. Gypframe RB1
Resilient Bars fixed to underside of joists at
450mm centres and at perimeter with ceiling
linings as in table fixed into the bars only.
100mm Isover Spacesaver Ready-Cut
in the cavity.
For further assistance in choosing the right solution for your project, try the White Book System Selector; an online tool that enables quick and
easy filtering by performance criteria. It provides system specific information downloads including BIM (Revit) objects. Go to british-gypsum.com
1 Fornont&gfloors,overlaywith6mmplywoodandensurealljointsarestaggered.
Thefireresistanceandsoundinsulationperformancesareforimperforatepartitions,wallsandceilingsincorporatingboardswithalljointstapedand
filled,orskimmedaccordingtoBritishGypsum’srecommendations.ThequotedperformancesareachievedonlyifBritishGypsumandSaint-GobainIsover
componentsareusedthroughout,andtheCompany’sfixingrecommendationsarestrictlyobserved.Anyvariationinthespecificationsshouldbecheckedwith
BritishGypsum.
Whereboardsarefixeddirecttotimberjoists,BritishGypsumDrywallScrewsshouldbeusedasopposedtonail-fixingtominimisetheriskoffixing
defectsoccurring.
2
For details of when
to specify fire
resistance using EN
Refer to C02. S01. P05
C06. S06. P08 0115 945 6123 [email protected]
C06
Loadbearing tim
ber joist floorsFloors an
d ceilings
Loadbearing timber joist floors performance (continued)
Ceiling indirectly fixed to new or existing solid timber joist floors
1 2
Table 4b - Solutions to satisfy requirements of BS 476: Part 21: 1987
22mm t&g1 (softwood or chipboard) floor
boarding over minimum 195mm x 38mm
timber joists at 600mm centres.
Gypframe RB2 SureFix Bars fixed to underside of
joists at 450mm centres and at perimeter with
ceiling linings as in table fixed into the bars only.
100mm Isover Acoustic Partition Roll (APR 1200)
in the cavity.
22mm t&g1 (softwood or chipboard) floor
boarding over minimum 195mm x 38mm
timber joists at 600mm centres.
Gypframe RB1 Resilient Bars fixed to
underside of joists at 450mm centres and at
perimeter with ceiling linings as in table fixed
into the bars only.
22mm t&g1 (softwood or chipboard) floor
boarding over minimum 195mm x 38mm
timber joists at 600mm centres.
Gypframe RB1 Resilient Bars fixed to underside
of joists at 450mm centres and at perimeter
with ceiling linings as in table fixed into the
bars only. 100mm Isover Spacesaver Ready-Cut
in the cavity.
Detail Nominal
floor
depth
mm
Board
type
Ceiling lining
thickness
mm
Maximum
loadbearing
ratio
Sound insulation System
referenceAirborne
Rw dB
Impact
Ln,w dB
30 minutes fire resistance
1 240 Gyproc WallBoard 1 x 12.5 100% 41 76 C206006
60 minutes fire resistance
2 258 Gyproc FireLine 2 x 12.5 100% 45 72 C016031
3 263 Gyproc SoundBloc 2 x 15 100% 54 60 C206009
For further assistance in choosing the right solution for your project, try the White Book System Selector; an online tool that enables quick and
easy filtering by performance criteria. It provides system specific information downloads including BIM (Revit) objects. Go to british-gypsum.com
1 Fornont&gfloors,overlaywith6mmplywoodandensurealljointsarestaggered.
Thefireresistanceandsoundinsulationperformancesareforimperforatepartitions,wallsandceilingsincorporatingboardswithalljointstapedand
filled,orskimmedaccordingtoBritishGypsum’srecommendations.ThequotedperformancesareachievedonlyifBritishGypsumandSaint-GobainIsover
componentsareusedthroughout,andtheCompany’sfixingrecommendationsarestrictlyobserved.Anyvariationinthespecificationsshouldbecheckedwith
BritishGypsum.
Whereboardsarefixeddirecttotimberjoists,BritishGypsumDrywallScrewsshouldbeusedasopposedtonail-fixingtominimisetheriskoffixing
defectsoccurring.
3
For details of when
to specify fire
resistance using BS
Refer to C02. S01. P05
C06. S06. P09 british-gypsum.com
C0
6Lo
adbe
arin
g ti
mbe
r jo
ist
floo
rsFl
oors
an
d ce
ilin
gs
For further assistance in choosing the right solution for your project, try the White Book System Selector; an online tool that enables quick and
easy filtering by performance criteria. It provides system specific information downloads including BIM (Revit) objects. Go to british-gypsum.com 1 Fornont&gfloors,overlaywith6mmplywoodandensurealljointsarestaggered.2 TheseBritishGypsumApprovedSystemsaredesignedtoachieveminimumDnTw+Ctr45dBandL’nT,w62dBsubjecttoPre-CompletionTesting.
RefertoC06.S01.P03–Floorsandceilingsintroduction,table1.
Separatingfloorsrequirebothasuitableisolatingfloorandasuitableisolatingceiling.
Thefireresistanceandsoundinsulationperformancesareforimperforatepartitions,wallsandceilingsincorporatingboardswithalljointstapedand
filled,orskimmedaccordingtoBritishGypsum’srecommendations.ThequotedperformancesareachievedonlyifBritishGypsumandSaint-GobainIsover
componentsareusedthroughout,andtheCompany’sfixingrecommendationsarestrictlyobserved.Anyvariationinthespecificationsshouldbecheckedwith
BritishGypsum.
Whereboardsarefixeddirecttotimberjoists,BritishGypsumDrywallScrewsshouldbeusedasopposedtonail-fixingtominimisetheriskoffixing
defectsoccurring.
Typical platform floor construction (comprising walking
surface of 18mm t&g1 wood board flooring,
spot-bonded with Gyproc Sealant at 300mm centres to
a substrate of Gyproc Plank laid on 25mm Isover Sound
Deadening Floor Slab, laid on a minimum of 12mm
wood-based sheet sub-deck nailed to the joists) over
195mm x 44mm timber joists at 600mm centres.
100mm Isover Acoustic Partition Roll (APR 1200)
between the joists. Linings as in table.
Separating sub-joist floor comprising of a platform floor
construction (comprising walking surface of 18mm
t&g1 wood board flooring, spot-bonded with Gyproc
Sealant at 300mm centres to a substrate of Gyproc Plank
laid on 25mm Isover Sound Deadening Floor Slab, laid
on a minimum of 12mm wood-based sheet sub-deck
nailed to the joists) over minimum 47mm wide timber
floor joists at 600mm centres. 100mm Isover Acoustic
Partition Roll (APR 1200) in the cavity. Independent
minimum 47mm wide ceiling joists. Linings as in table.
Typical platform floor construction (comprising walking
surface of 18mm t&g1 wood board flooring, spot-bonded
with Gyproc Sealant at 300mm centres to a substrate
of Gyproc Plank laid on 25mm Isover Sound Deadening
Floor Slab, laid on a minimum of 12mm wood-based sheet
sub-deck nailed to the joists) over minimum 195mm x 38mm
timber joists at 600mm centres. Gypframe RB1 Resilient
Bars fixed to underside of joists at 450mm centres and at
perimeter with ceiling. Linings as in table fixed into the bars
only. 100mm Isover Spacesaver Ready-Cut in the cavity.
Detail Nominal floor
depth
mm
Board
type
Ceiling lining
thickness
mm
Maximum
loadbearing
ratio
Sound insulation System
referenceAirborne
Rw (R
w + Ctr) dB
Impact
Ln,w
dB
60 minutes fire resistance
1 301Gyproc Plank (inner layer) +
Gyproc SoundBloc (outer layer)1 x 19 + 1 x 12.5 100% 62 (50) 56 C016038
3 315 Gyproc SoundBloc 2 x 15 100% 64 (53)2 54 C016040
2 320 Gyproc SoundBloc 2 x 15 100% 66 (55)2 48 C106050
Loadbearing timber joist floors performance (continued)
Compartment / separating solid timber joist and sub-joist floors
Table 5 - Solutions to satisfy requirements of BS 476: Part 8: 1972 or BS 476: Part 21: 1987
1 2 3
For details of when
to specify fire
resistance using BS
Refer to C02. S01. P05
C06. S06. P10 0115 945 6123 [email protected]
C06
Loadbearing tim
ber joist floorsFloors an
d ceilings
Detail Board
type
Ceiling lining
thickness
mm
Noggings
required
Insulation
type
System
reference
30 minutes fire resistance
1 Gyproc WallBoard 2 x 15 Yes1 150mm Isover Spacesaver Ready-Cut C106052
1 Gyproc FireLine 2 x 12.5 Yes1 150mm stone mineral wool (24kg/m3) C106048
60 minutes fire resistance
2 Glasroc F firecase 2 x 15 No 25mm stone mineral wool (100kg/m3) G106040
120 minutes fire resistance
3 Gyproc FireLine 4 x 15 No 150mm stone mineral wool (22kg/m3) C100038
For further assistance in choosing the right solution for your project, try the White Book System Selector; an online tool that enables quick and
easy filtering by performance criteria. It provides system specific information downloads including BIM (Revit) objects. Go to british-gypsum.com
1 Atceilingperimeterandtosupportouterlayerceilingboardjoints.
Thefireresistanceandsoundinsulationperformancesareforimperforatepartitions,wallsandceilingsincorporatingboardswithalljointstapedand
filled,orskimmedaccordingtoBritishGypsum’srecommendations.ThequotedperformancesareachievedonlyifBritishGypsumandSaint-GobainIsover
componentsareusedthroughout,andtheCompany’sfixingrecommendationsarestrictlyobserved.Anyvariationinthespecificationsshouldbecheckedwith
BritishGypsum.
Whereboardsarefixeddirecttotimberjoists,BritishGypsumDrywallScrewsshouldbeusedasopposedtonail-fixingtominimisetheriskoffixing
defectsoccurring.
1
150mm x 38mm (minimum) chords at 600mm
(maximum) centres. Insulation and
ceiling linings as in table.
Loadbearing timber joist floors performance (continued)
Ceiling directly fixed to bottom chord of trusses below the roof space (non-loadbearing)Table 6a - Solutions to satisfy the requirements of BS EN 1364-2
For details of when
to specify fire
resistance using EN
Refer to C02. S01. P05
CasoLine mf suspended from bottom
chord. Insulation laid over Gypframe
grid. Linings as in table.
2
CasoLine mf suspended from bottom chord.
Gypframe MF7 at 600mm centres suspended
at 1200mm centres. 150mm stone mineral
wool (22kg/m3) laid over Gypframe grid.
Linings as in table.
3
C06. S06. P11 british-gypsum.com
C0
6Lo
adbe
arin
g ti
mbe
r jo
ist
floo
rsFl
oors
an
d ce
ilin
gs
For further assistance in choosing the right solution for your project, try the White Book System Selector; an online tool that enables quick and
easy filtering by performance criteria. It provides system specific information downloads including BIM (Revit) objects. Go to british-gypsum.com
1 Nominal50mmx25mmtimberbattensshouldbefixedtothesideoftimbersupportswheretheceilingboardsbutttomaintainanadequatebearingsurface.
Refertoconstructiondetail7.2 Atceilingperimeterandtosupportouterlayerceilingboardjoints.
Thefireresistanceandsoundinsulationperformancesareforimperforatepartitions,wallsandceilingsincorporatingboardswithalljointstapedand
filled,orskimmedaccordingtoBritishGypsum’srecommendations.ThequotedperformancesareachievedonlyifBritishGypsumandSaint-GobainIsover
componentsareusedthroughout,andtheCompany’sfixingrecommendationsarestrictlyobserved.Anyvariationinthespecificationsshouldbecheckedwith
BritishGypsum.
Whereboardsarefixeddirecttotimberjoists,BritishGypsumDrywallScrewsshouldbeusedasopposedtonail-fixingtominimisetheriskoffixing
defectsoccurring.
Detail Board
type
Ceiling lining
thickness
mm
Noggings
required
Insulation type System reference
30 minutes fire resistance
1 Glasroc F multiboard 1 x 12.5 Yes2 150mm Isover Spacesaver Ready-Cut G106041
2 Gyproc WallBoard 2 x 12.5 Yes2 150mm Isover Spacesaver Ready-Cut C106049
1 Gyproc FireLine 1 x 12.5 Yes2 150mm Isover Spacesaver Ready-Cut C106047
4 Gyproc WallBoard 2 x 12.5 No 100mm Isover Spacesaver Ready-Cut C106045
60 minutes fire resistance
2 Glasroc F multiboard 2 x 10 Yes2 150mm Isover Spacesaver Ready-Cut G106042
3 Gyproc FireLine 2 x 12.5 Yes2 150mm stone mineral wool (24kg/m3) C106048
4 Gyproc FireLine 2 x 15 No 30mm stone mineral wool (45kg/m3) C106051
120 minutes fire resistance
5 Gyproc FireLine 4 x 15 No 150mm stone mineral wool (22kg/m3) C100038
1 2 3
CasoLine mf suspended from chords.
Insulation laid over Gypframe grid.
Linings as in table.
4
Loadbearing timber joist floors performance (continued)
Ceiling directly fixed to bottom chord of trusses below the roof space (non-loadbearing)Table 6b - Solutions to satisfy requirements of BS 476: Part 22: 1987
For details of when
to specify fire
resistance using BS
Refer to C02. S01. P05
38mm (minimum) timber joists or 35mm (minimum)1
bottom chord of trusses at 600mm centres, with
suitable timber noggings between joists to support
board edges. Insulation laid between joists (see table).
Linings as in table.
38mm (minimum) timber joists or 35mm (minimum)1
bottom chord of trusses at 600mm centres, with
suitable timber noggings between joists to support
board edges. Insulation laid between joists (see table).
Linings as in table.
38mm (minimum) timber joists or 35mm (minimum)1
bottom chord of trusses at 600mm centres, with suitable
timber noggings between joists to support board edges.
Insulation laid between joists (see table).
Linings as in table.
CasoLine mf suspended from bottom chord. Gypframe
MF7 at 600mm centres suspended at 1200mm cen-
tres. 150mm stone mineral wool (22kg/m3) laid over
Gypframe grid. Linings as in table.
5
C06. S06. P12 0115 945 6123 [email protected]
C06
Loadbearing tim
ber joist floorsFloors an
d ceilings
Planning – key factors
Tominimisetheriskofceilingfinishdefectsoccurring,seasoned
timberwithamoisturecontentnotexceedingthatrecommended
inBS 5268: Part 2: 2002shouldbeused.Thecontractorshould
ensurethattimbersupportsareaccuratelyspaced,aligned,and
levelled.BritishGypsumDrywallScrewsarethepreferredmethod
offixing.
Cavity barriers
Cavitybarriersmayberequiredtosatisfytherequirementsofthe
BuildingRegulations.
Refer to C06. S07. P02 – Cavity barriers.
Strength and robustness
Timbershouldbealignedandlevel,andshouldmeetthe
requirementsofBS 5268: Part 2: 2002.Thedimensionsand
assemblyoftimbersupportsshouldbesufficienttoallowpositive
fixingofplasterboardwithoutbounceorunduedeflection
becauseofscrewingorotherappliedforce.Whentheabovefixing
conditionscannotbemet,atimberbattenshouldbesecurelyfixed
tothesideofthetimbersupportswhereceilingboardsbutt,in
ordertoincreasethebearingsurface.
Whereboardsarefixedatmaximumcentresinadverseconditions,
thestandardofliningcanbeaffected.Adverseconditionscan
generallybedescribedasconditionswherehighhumidityoccurs,
principallyinthecold,damp,autumn/winterperiod.Theyalso
refertobuildingsunderconstructionoverthisperiod,whereboth
thestructureandwetapplicationssuchasplasteringandscreeding
aresubjecttoslowdryingconditions.Intheseadverseconditions
thereisariskoftheplasterboardbowingandthereforeadditional
plasterboardsupportframingshouldbeincorporated.
Water vapour control
Whereavapourcontrollayerisincludedintheceilingconstruction
inconditionsdescribedpreviously,condensationcanformon
thevapourcontrolsurface.Thiscanresultinplasterboard
becomingundulydamp,andaffectingthestandardofacceptability
oftheliningandanyappliedplasterortexturedcoating.Inthese
circumstancesincreasedventilationordehumidificationis
recommended.
Wherethereisarequirementforavapourcontrollayer,duplexgrade
Gyprocplasterboardsshouldbespecifiedasthefacelayer,i.e.the
secondlayerindoublelayerlinings.Theapplicationoftwocoats
ofGyprocDrywallSealertothefaceliningwillalsoprovidevapour
control.
Loadbearing timber joist floors design
Timbernoggingsshouldalwaysbeincorporatedwhenfixing
boardsofferingavapourcontrollayer,irrespectiveofjoistspacing,
e.g.duplexgradeGyprocplasterboardandthermallaminates
providingvapourcontrol.
Acoustic performance
Airtightnessisessentialforoptimumsoundinsulation.Whilemost
junctionswillbesealedwithstandardfinishingmaterials,gapsat
theperimeterofthefloorandceiling,andothersmallairpaths,
canbesealedusingGyprocSealant.Theperformanceofthefloorin
practicewillgenerallybegovernedbyflankingtransmission.
Refer to section C02. S01. P08 – Building acoustics.
Imposed loads
Thedesignershouldensurethatthefloorconstructionissuitable
tosupportanyimposedloads.
Timber noggings within timber floors (direct fix applications)
Suitabletimbernoggings,typically38mmx38mmor50mmx
50mm,mayberequiredbetweenjoistsandattheceilingperimeter
tosupporttheedges/endsoftheboard.Theprovisionofnoggings
dependsonseveralfactors;thethicknessoftheboard,spacingof
thetimberjoistsandanytechnicalperformancerequirements,
e.g.vapourresistanceandfireresistanceperformance.Table7
belowprovidesinformationonthegeneralrequirementof
noggings.However,referencemustalsobemadetotherelevant
technicalperformancetables(1-6b)onthepreviouspagesto
establishtheneedfornoggingsinfire-ratedsituations.
Handy hint
ForfurtherinformationregardingBuildingRegulationsacousticperformancerequirements.
Refer to C02. S01. P08 – Building acoustics.
Table 7 – Provision of timber noggings within timber floors
Board thickness
Maximum joist centres
with
noggings
mm
without
noggings
mm
6mm Glasroc F multiboard 450 400
10mm Glasroc F multiboard 600 450
12.5mm Gyproc plasterboard /
Glasroc F multiboard600 450
15mm & 19mm Gyproc plasterboard 600 600
Gyproc ThermaLine laminates 600 450
Perimeternoggingsarerequiredifthefloorisrequiredtoprovidefire
resistance.
Important information
Impactsoundinsulation,Ln,w
isameasurementoftheamountofsoundenergytransmittedthroughthefloorwhentestedunderlaboratoryconditions.Therefore,thelowerthefigure,thebettertheperformance.
Loadbearing timber joist floors performance (continued)
Ceiling directly fixed to bottom chord of trusses below the roof space (non-loadbearing)Table 6b - Solutions to satisfy requirements of BS 476: Part 22: 1987
C06. S06. P13 british-gypsum.com
C0
6Lo
adbe
arin
g ti
mbe
r jo
ist
floo
rsFl
oors
an
d ce
ilin
gs
Joist width
Wherethejoistwidthislessthantheminimumstatedintables
1-6b,thesystemmaynotmeetitsspecifiedperformance.
Whereminimumfixingtolerancescannotbemet,e.g.the
inadequatebearingsurfaceaffordedby35mmwidthtrussed
rafters,50mmx25mmtimberbattensshouldbescrew-fixedto
thesideofthejoistswhereceilingboardsabutinordertoextend
thebearingsurface.
Refer to construction detail 7.
Nail popping
Looseningofnailsintimbercanoccurthroughtimbershrinkage,
orasaresultoffixingboardstomisalignedortwistedframing.To
reducetherisks,boardsshouldbefixedtighttoframingmembers
usingBritishGypsumDrywallScrewspenetratingminimum
25mmintothetimber.Alternatively,fixGypframeRB1Resilient
BarorGypframeRB2SureFixBartotheundersideoftimberjoists
toprovideapositivegroundforscrew-fixingtheceilinglinings.
Intestswherejoistswarpedandtwistedunderdryingshrinkage,
GypframeRB1ResilientBarandGypframeRB2SureFixBarwere
successfulinprovidingasoundbaseforplasterboardfixing,
resultinginnofixingdefects.GypframeRB1ResilientBarand
GypframeRB2SureFixBaralsocontributetothesoundinsulation
ofatimberjoistfloor.
Loadbearing timber joist floors design (continued)
Important information
Timbernoggingsarealwaysrequiredaroundtheceilingperimeter,exceptwhenusing15mmGyprocWallBoardand19mmGyprocPlankinnonfire-ratedsituations.Inmulti-layerplasterboardceilings,theprovisionfornoggingsrelatestotheouterlayerboardonly(unlessotherwisestated).
Fixing to super-dried timber and engineered timber ‘I’ beams
TestresultsshowthatBritishGypsumDrywallScrewsarethe
preferredsolutionforfixingtostandardsoftwood,super-dried
timber(approximately12%moisturecontent)andengineered
timber‘I’beams.Whenengineeredtimber‘I’beamsortimber
joistsareusedinconjunctionwithametalframedpartition
suchasGypWallrapiddB Plus,thecontractormaywishtouse
BritishGypsumDrywallScrewsforbothapplications(similar
lengthsareavailable).
Existing lath and plaster ceilings
Acoustically,lathandplasterprovidessimilarperformanceto
2layersof15mmGyprocSoundBlocorinnerlayer19mm
GyprocPlankandouterlayer12.5mmGyprocSoundBloc.Inthe
eventoffireitiscriticalthatthelathandplasterremaininplace.
Duetotheirvariablenature,itisnotpossibletoprovideafire
resistance.
Inordertoensuretherequiredfireresistanceofafloorisachieved,
itisrecommendedtounder-drawthelathandplasterwithchicken
wire(fixedinaccordancewithmanufacturerrecommendations).
Acavityshouldthenbeformedwithminimum38x38mmtimber
battensorGypLyner universal.
Services
Theinstallationofelectricalservicesshouldbecarriedoutin
accordancewith BS 7671.Electricalandothersmallserviceruns
canberoutedwithinthefloorcavity.Concealedcablesmayneed
earthedmetalliccovering,ortobeenclosedinearthedconduit,
trunking,orductingtosatisfyBS 7671.
Fixtures
Fixturesshouldbemadeintojoists,ortosupplementarytimber.
CaremustbetakennottobridgeGypframeRB1ResilientBaror
GypframeRB2SureFixBar.
Board finish
Refer to C08. S01. P02 – Finishes.
For more information, visit timber-frame.org
C06. S06. P14 0115 945 6123 [email protected]
C06
Loadbearing tim
ber joist floorsFloors an
d ceilings
Loadbearing timber joist floors construction details
1
1 Gyproc plasterboard
2 Timber joist
3 Timber noggings to provide support at the perimeter
4 Timber noggings to provide support board edges
1
2
3
2
Reflectedceilingplan-singlelayer.12.5mmplasterboardwithjoistsatmaximum600mmcentres
Reflectedceilingplan-singlelayer.12.5mmplasterboardwithjoistsatmaximum450mmcentres
(or15mmplasterboardwithjoistsatmaximum600mmcentres)
1
4
3
2
RefertoC06.S06.P12-table7fortheprovisionoftimbernoggings.
C06. S06. P15 british-gypsum.com
C0
6Lo
adbe
arin
g ti
mbe
r jo
ist
floo
rsFl
oors
an
d ce
ilin
gs
Loadbearing timber joist floors construction details (continued)
1
2
3
3
4
Reflectedceilingplansinglelayer-12.5mmGyprocHandiBoardwithjoistsatmaximum610mmcentres
Reflectedceilingplandoublelayer-12.5mmplasterboardwithjoistsatmaximum450mmcentres
(noggingsmayberequiredtosupportlongedgesofboardofouterlayeriffire-rated)
1 Gyproc plasterboard
2 Timber joist
3 Noggings to provide support at the perimeter
4 Noggings to provide support board edges
5 Gyproc HandiBoard
5
4
3
2
RefertoC06.S06.P12-table7fortheprovisionoftimbernoggings.
C06. S06. P16 0115 945 6123 [email protected]
C06
Loadbearing tim
ber joist floorsFloors an
d ceilings
35mm 25mm
1 Gyproc plasterboard
2 Timber joist
3 Gypframe RB2 SureFix Bar
4 Gypframe RB2 SureFix Bar noggings at perimeter
5 GypWall classic
6 Timber batten (50 x 25mm)
Loadbearing timber joist floors construction details (continued)
5
6
PartitionheadfixingtoceilingwithGypframeRB2SureFixBar
Reflectedceilingplansinglelayer-12.5mmplasterboardwithGypframeRB2SureFixBarsatmaximum450mmcentres
4
3
1
2
1
6
Increasingbearingsurfaceoftimberraftersandjoists
7
2
2
1
5
3
C06. S06. P17 british-gypsum.com
C0
6Lo
adbe
arin
g ti
mbe
r jo
ist
floo
rsFl
oors
an
d ce
ilin
gs
Gypframe metal components ( Refer to C10. S02. P02 for details)
Gypframe RB1 Resilient Bar
Acousticallyengineeredchanneltoseparateboard
fixingfromtimberjoistandtoovercomenail
popping.Fixedtoundersideofjoists.
Gypframe RB2 SureFix Bar
Acousticallyengineeredchanneltoseparateboard
fixingfromtimberjoistandtoovercomenail
popping.Fixedtoundersideofjoists.
Board products ( Refer to C10. S03. P02 for details)
Gyproc WallBoard1
Standardgypsumplasterboard.Gyproc FireLine1
Gypsumplasterboardwithfireresistantadditives.
Gyproc Moisture Resistant
Gypsumplasterboardwithmoistureresistant
additivesinthecoreandspecialgreenliningpaper
foreasyrecognition.Toreceivetapeandjointfinish.
Glasroc F multiboard
Non-combustibleglass-reinforcedgypsumboard.
Gyproc Plank
Standardgypsumplasterboardlocatedasan
innerlayer.
Glasroc F firecase
Non-combustibleglass-reinforcedgypsumboard.
Gyproc SoundBloc1
Gypsumplasterboardwithahighdensitycorefor
enhancedsoundinsulationperformance.
Fixing products ( Refer to C10. S04. P02 for details)
British Gypsum Drywall Screws
Corrosionresistantself-tappingsteelscrews
forfixingboard-to-timberandboard-to-metal
framinglessthan0.8mmthick.
Glasroc F firecase ScrewsCorrosionresistantself-tappingsteelscrewswithuniqueheaddesignthatcountersinksitselfforfixingGlasrocFfirecaseboardstotimberjoistsat150mmcentres.
British Gypsum Collated Drywall Screws
Corrosionresistantself-tappingsteelscrews
forfixingboard-to-timberandboard-to-metal
framinglessthan0.8mmthick.
Loadbearing timber joist floors components
1 AlsoavailableinaMoistureResistant(MR)version,MRboardsarespecified
tointermittentwetuseareas.
C06. S06. P18 0115 945 6123 [email protected]
C06
Loadbearing tim
ber joist floorsFloors an
d ceilings
Plasterboard accessories ( Refer to C10. S05. P02 for details)
Gyproc Jointing Material
Jointingcompounds,readymixesandadhesives
forreinforcementandfinishingofboardjoints.
Primersandsealersfortreatmentofboardsfor
pre-decoration.
Gyproc Sealant
Usedtosealairpathsforoptimumsound
insulation.
Gyproc edge and angle beads
Protectingandenhancingboardedgesandcorners
Gyproc Joint Tape
Apapertapedesignedforreinforcementofflat
jointsorinternalangles.
Finishing products ( Refer to C10. S06. P02 for details)
Thistle MultiFinish
Toprovideaplasterskimfinishonmostcommon
backgroundsincludingundercoatplastersand
plasterboard.
ThistlePro PureFinish
Toprovideaplasterskimfinishwith
ACTIVairtechnology.Usedtofinishmost
commonbackgroundsincludingundercoat
plastersandplasterboard.Formoreinformation
refertoC02.S01.P49.
Thistle BoardFinish
ToprovideaplasterskimfinishtoGyproc
plasterboards.
Plaster accessories
Designedforthereinforcementandfinishingof
boardjointsbeforeplasterskimming.
Thistle ProTape FT50
Self-adhesive48mmwideglassfibremeshtape.
Thistle ProTape FT100
Self-adhesive100mmwideglassfibremeshtape.
Insulation products ( Refer to C10. S09. P02 for details)
Isover Spacesaver Ready-Cut
Glassmineralwoolforenhancedacousticand
thermalperformance.
Isover Acoustic Partition Roll (APR 1200)
Glassmineralwoolforenhancedthermal
performance.
Isover Sound Deadening Floor Slab
Glassmineralwoolforenhancedacoustic
performance.
Stone Mineral Wool
(22kg/m3, 24kg/m3 and 45kg/m3, by others)
Loadbearing timber joist floors components (continued)
C06. S06. P19 british-gypsum.com
C0
6Lo
adbe
arin
g ti
mbe
r jo
ist
floo
rsFl
oors
an
d ce
ilin
gs
Loadbearing timber joist floors installation overview
Additional information
Forfullinstallationdetails,refertotheBritish Gypsum Site Book,availabletodownloadfrombritish-gypsum.com
Thisisintendedtobeabasicdescriptionofhowthesystemisbuilt.
FordetailedinstallationguidancerefertotheBritish GypsumSite Book.
Alternatively,GypframeRB1ResilientBarsor
GypframeRB2SureFixBarsarefixed
throughthesinglefixingflangetothe
undersideoftimberjoists(at90˚tothem)
usingBritishGypsumDrywallScrews.The
firstandlastrowsofGypframeRB1Resilient
BarsorGypframeRB2SureFixBarsare
locatedatallwallperimeters.
Wherebarsarenotlongenoughtospanthe
ceiling,endsarebuttedtogetherdirectly
underajoistandscrew-fixedthroughthe
flangeofbothends.
Gyprocplasterboardsarefixedtothe
undersideofGypframeRB1ResilientBarsor
GypframeRB2SureFixBarswithBritish
GypsumDrywallScrews.
Whenfixingboards,caremustbetakento
ensurethattheplasterboardfixingscrews
donotmakecontactwiththejoists.
Gyprocplasterboardscanbefixeddirectly
totheundersideoftimberjoists.Timber
noggingsarefitted,whererequired,
betweenjoistsatroomperimetersto
supportboardedges.Noggingsmayalso
berequiredtosupportboardedgesinthe
fieldoftheboards.Plasterboardsarefixed
totimbersupportsusingBritishGypsum
DrywallScrews.
C06. S06. P20 0115 945 6123 [email protected]
C06
Loadbearing tim
ber joist floorsFloors an
d ceilings