IJOIST DETALII PLANSEE

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FLOOR SYSTEM

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SUPPORTING FLOORS,FORESTRY AND THE

CONSTRUCTION INDUSTRY

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INTRODUCTION 4-5

Finnframe Floor System Hardware 6-7

Finnframe Floor System Software 8

Finnframe Technical Support 8

DESIGN

Finnjoist (FJI) Design Values 9

Finnframe Floor Performance & Design 10

Finnframe Floor Performance Classes 10

Weights of Materials 11

Finnjoist (FJI) Span Table 12

Kerto-Q Design Values 13

Kerto-S Design Values 14-15

Kerto-S Multiple Ply Beams 16-17

Characteristic Values 18

INSTALLATION

Finnseal 19

Masonry Construction 20-21

Timber Frame Construction 22-23

General Floor Construction 24-25

Hole Construction 26-27

GENERAL INFORMATION

Temporary Erection Bracing System 28

Safe Construction Loading 29

Fire Resistance (Part B) 30

Sound Transmission (Part E) 31

Ground Floor Information 32-33

Warnings & Handling 34-35

A COMMITMENT TO THE ENVIRONMENT

The environmental credentials of Finnforest’s Finnframe Floor System are without parallel. Finnframe satisfies themost stringent requirements for sustainability.

Our commitment to renewable resources begins with the 130,000 private Finnish forest owners from whom weprocure most of our timber. At every stage thereafter we control distribution, manufacture and sales of our products.That unbroken chain from sapling to selling gives us an unrivalled ability to trace the source of timber products.

We take our environmental responsibilities as seriously as you do. We hold full Chain of Custody and environmentalcertification under PEFC for every Finnjoist (FJI) and Kerto product that we supply. That’s why you can rely onFinnframe - and on the Finnjoist (FJI) that supports it all - for the reassurance that you and your clients demand.

If you’re involved in government or local authority projects, or if you have your own strong environmental charter, you only have to specify Finnjoist (FJI) to meet current standards, including the latest Government TimberProcurement Policies.

CONTENTS

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LIFETIME GUARANTEEFinnforest’s Finnframe products are manufactured andengineered to the highest standards. Each product is fully backed by our FinnframeGuarantee to be free from defects in materials andworkmanship in accordance to Finnforest specification.

When installed and used correctly, we guarantee thatour products will perform for the lifetime of thestructure in which it has been installed.

If, however, for some unfortunate reason your floordevelops a problem caused by material defect, thenFinnforest will promptly resolve possible problemswith the minimum of inconvenience to you.

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PEFC/16-37-006QM 36/0031224-CPD-0001 02/0026KERTO CERT: NO 00/3717

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FINNFRAME FLOOR SYSTEMA SINGLE, STANDARDS-COMPLIANT SOLUTION GUIDES YOU FROM DRAWING BOARD TO FINISHED BUILDINGThe Finnframe Floor System does the job of specifying for you. It converts your own floor plans into a 3-D imageof the supporting structure together with a complete bill of materials and detailed site plans. Those plans go withour Finnjoists and other engineered wood products to provide a comprehensive drawing-board to building-siteflooring system.

The Finnframe Floor System is an inspired mix of quality, technology, and service - a total flooring systemdevised specifically for the UK construction industry. Most important of all, it’s the only flooring system thatcomplies with Eurocode 5.

FULLY ENGINEERED FOR BETTER PERFORMANCEEngineered and factory produced to give uniform strength, rigidity, size and weight, our engineered woodproducts out-perform traditional solid wood construction. Produced at reduced moisture content our engineeredwood products are some of the most stable on the market today. Our Finnjoist is a prime example, with a highquality OSB web and flanges made of our own Kerto (LVL), delivering less dimensional change over time,virtually eradicating floor movement and its associated problems, resulting in greater floor performance.

THE FINNFRAME FLOORING PRODUCT RANGE

FINNJOIST (FJI)Manufactured at our purpose-built factory in King’s Lynn, Finnjoists are strong, stable and lightweight. Finnjoist is the first I-Joist on the market that has European Technical Approval (ETA) and that is CE marked.

KERTO-S (LVL-Laminated Veneer Lumber)A strong, lightweight, rigid and dimensionally stable timber product made from 3mm rotary-peeled spruceveneers. Kerto-S is ideal for beams and long spans, combining the strength of an engineered wood product withthe ease of use of softwood.

KERTO-Q (LVL-Laminated Veneer Lumber)Engineered in the same way as Kerto-S but with some cross-laid veneers, Kerto-Q (LVL) is renowned for itsdimensional stability and load bearing performance.

FINNFRAME SOFTWARE PACKAGEAdvanced design package that saves time, eliminates wastage, and offers certainty by turning your floor plansinto a detailed specification that complies with current British and European standards.

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THE HARDWARE

Finnjoist (FJI), forms the heart of our floor system. Manufactured in the UK at our purpose-built factory in King’s Lynn toexacting tolerances, the Finnjoist (FJI) with its Kerto flange and high quality OSB web has a high strength to weightratio and therefore produces lighter, longer spans combined with quick and easy installation so reducing your build timeand increasing efficiency. Finnjoists have full 3rd party accreditation through the BM Trada Q-Mark and are the firstproduct on the market to gain the European Technical Approval (ETA) and the CE mark.

A Flange manufactured from Kerto. B Web manufactured from high quality OSB. Standard Finnjoist sizes.

A

B

39

38

10

FJI 38

200, 220,240, 300

39

45

10

FJI 45

200, 220, 240,300, 360, 400

39

58

10

FJI 58

200, 220,240, 300,360, 400

39

89

10

FJI 89

200, 220,240, 300,360, 400

QM 36/003

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CE MARKED TODAY FOR TOMORROWBeing produced from technically advancedproducts and rigorously tested means ourFinnjoist (FJI) has been accredited with the CE mark.

To find out more about CE marking and how it will affect your business visit us onwww.finnforest.co.uk

02/0026

1224-CPD-0001

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KERTO

Manufactured by Finnforest since 1975, our Kerto is a unique product which not only serves as the flange material for our (FJI) I-Joists but is the perfect choice for long spans, rimbeams, lintels and high-load structural applications. Kerto has BBA certification and PEFC environmental accreditation.

Kerto is produced from rotary-peeled 3mm graded softwood veneers, which are then glued together to form acontinuous 1.8 or 2.5 metre wide product. The 21mm to 90mm thick billets are then further machined to the finisheddimensions. The result is an engineered wood product that maintains the natural beauty of wood whilst being strongenough for most types of construction applications.

1 Sawing

2 Rotary Peeling

3 Clipping

4 Drying

5 Gluing

6 Layup

7 Hot Press

8 Cross-cutting

9 Rip-sawing

10 Despatching

1 2 3 4 5 6 7 8 9 10

Kerto-S - with longitudinally laid veneers

Kerto-Q - with cross laid veneers

PEFC/16-37-006PROMOTING SUSTAINABLE

FOREST MANAGEMENT -FOR MORE INFO: WWW.PEFC.ORG

OR WWW.FINNFOREST.CO.UK

AT LEAST 70% OF THIS PRODUCT IS FROM PEFC SOURCES

COC TT-PEFC-0009

KERTO CERT: NO 00/3717

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There are two key types of Kerto:

Kerto-S is produced so that all its veneers are laid in the same direction, Kerto-S delivers a product perfect for beams whatever thespecification and for achieving long spans with minimal deflection. As standard, Kerto-S is supplied with a wax coating. Please contactFinnforest Technical Support for further information.

Kerto-Q is produced in a similar way to Kerto-S but with approximately 20% ofits veneers laid crossways, Kerto-Q delivers exceptional dimensionalstability and performs well where high compression strength isrequired. Kerto-Q is ideal as a rimboard in timber frame construction.

KERTO-S

39mm200220240300

200220240300360400

200220240300360400

200220240300360400

75mm 90mm

45mm

KERTO-Q

27mm200220240300

200220240300360400

33mm

Notes:

1. Kerto-S is supplied wax coated with the exception of90mm which is supplied uncoated.

2. Kerto is supplied with unsanded faces.

3. Other sizes and finishes are available to special order.Please contact Finnforest Technical Support 01205 883 835.

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TECHNICALLY ADVANCEDSIMPLE TO USE, GIVING YOU THE ADVANTAGEA programme of continuous development and advancement has given us the Finnframe software package, allowing you to view designs in 3D as well as plan view. Finnframe will deliver clear and concise material listings,structural and assembly drawings, and is designed to calculate to British Standards and Eurocode 5.Finnframe is also able to link with other software programmes including drafting, stock control and CNC cuttingprogrammes, a feature unique to Finnframe. Finnframe will link to our cutting optimisation programme, Finncut, to helpreduce waste.

TECHNICAL SUPPORTIn addition to the hardware and software our package is completed with the support of our UK basedTechnical Support Team and Technical Sales Team, providing technical advice, trouble shooting, training and giving you all the support required to complete your project.For more information on the above please contact our Support Team on 01205 883 835.

* Finnframe is exclusively for use by our qualified distributors

THE SOFTWARE - FINNFRAME*

FINNWOODTo complement the Finnframe software used by our trained distributors, Finnwood, our single member calculationsoftware is freely available upon request. With a simple user interface, Finnwood will give a fully detailed analysis of anystructural member required in the construction of your floor. Despite this ease of use, Finnwood provides the user withthe ability to input additional loads and alter loadings to suit their needs.

With the introduction of Eurocode 5, Finnwood will provide an output suitable for use with both Ultimate Limit State(EC5) and Allowable Stress Design (BS5268) calculations.

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FINNJOIST (FJI)LONG TERM DESIGN VALUES TO BS5268, SERVICE CLASS 1

Notes:1. The design values presented are for Service Class 1.

Typical Service Class 1 applications are intermediate floors in heated dwellings and commercial buildings. For other applications,please contact Finnforest Technical Support (01205 883 835).

2. The design values are for use with BS5268 and are applicable to long term load duration. Design values are according to BM TRADA Q-mark approval schedule no: 36/003.

3. Standard Single Span Deflection calculations are to include sheardeflection, i.e.

4. Minimum end bearing length should be taken as 45mm.

5. Minimum interior bearing length should be taken as 89mm.

6. For full moment capacity the compression flange must berestrained at 300mm centres. For alternative restraint centresplease contact Technical Support.

7. Please contact Technical Support for Service Class 2.

8. NS = No Web Stiffener at support.

S = Web Stiffener at support.

5.F.L4 F.L2

384. EI 8.GA+∆=

= Deflection (mm)

= Total Load (kN/m)

= Design span (mm)

= Flexural rigidity (Nmm2)

= Shear rigidity (N)EI

GA∆FL

DESIGN VALUES

JOIST WEIGHT MOMENT CAPACITY FLEXURAL SHEAR SHEAR CAPACITY END BEARING, INTERMEDIATE,TYPE kg/m kNm RIGIDITY RIGIDITY kN LOAD SHARE 45mm LOAD SHARE 89mm

NON-LOAD LOAD EI GA NON-LOAD LOAD NS S NS SSHARE SHARE Nmm2 N x106 SHARE SHARE kN kN kN kN

x 109

200-38 2.32 2.93 3.04 239 1.139 3.80 3.96 3.88 4.35 7.70 7.91

200-45 2.60 3.53 3.67 285 1.139 3.94 4.10 4.41 4.51 8.20 8.20

200-58 3.13 4.64 4.82 370 1.139 4.20 4.37 4.80 4.80 8.73 8.73

200-89 4.39 7.20 7.49 572 1.139 4.34 4.51 4.96 4.96 9.02 9.02

220-38 2.48 3.40 3.53 320 1.339 4.61 4.80 3.88 4.68 7.70 8.50

220-45 2.76 4.09 4.25 382 1.339 4.78 4.97 4.41 5.21 8.75 9.55

220-58 3.29 5.37 5.59 495 1.339 5.09 5.29 5.38 5.82 10.58 10.58

220-89 4.55 8.33 8.66 767 1.339 5.26 5.47 6.01 6.01 10.93 10.93

240-38 2.61 3.78 3.93 395 1.499 5.15 5.36 3.88 4.68 7.70 8.50

240-45 2.89 4.54 4.73 470 1.499 5.34 5.56 4.41 5.21 8.75 9.55

240-58 3.42 5.96 6.20 610 1.499 5.69 5.92 5.38 6.19 10.69 11.49

240-89 4.68 9.24 9.61 944 1.499 5.88 6.11 6.40 6.72 12.22 12.22

300-38 2.99 4.94 5.14 666 1.978 6.22 6.47 3.88 4.68 7.70 8.50

300-45 3.28 5.94 6.17 793 1.978 6.45 6.71 4.41 5.21 8.75 9.55

300-58 3.80 7.77 8.08 1028 1.978 6.87 7.14 5.38 6.19 10.69 11.49

300-89 5.06 12.00 12.48 1588 1.978 7.09 7.38 6.40 7.21 12.71 13.51

360-45 3.60 7.13 7.41 1130 2.378 7.02 7.30 4.41 5.21 8.75 9.55

360-58 4.12 9.31 9.68 1462 2.378 7.47 7.77 5.38 6.19 10.69 11.49

360-89 5.38 14.34 14.92 2256 2.378 7.72 8.03 6.40 7.21 12.71 13.51

400-45 3.92 8.34 8.68 1530 2.777 8.30 8.63 4.41 5.21 8.75 9.55

400-58 4.44 10.87 11.31 1978 2.777 8.84 9.20 5.38 6.19 10.69 11.49

400-89 5.70 16.71 17.38 3045 2.777 9.13 9.50 6.40 7.21 12.71 13.51

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Stiffness The ability of a material to resist deflection under load.Vibration Resonance of material. In floors mainly due to induced loads like walking.

Another factor in performance is the mass of the floor. Increasing the mass improves the impact sound propertiesof floors. However, a floor with low stiffness and a high mass can lead to vibration problems.

FLOOR STIFFNESS CAN BE IMPROVED BY:

Glued and fixed decking Improves composite action of joist and deck

Deeper joists and/or larger flanges Improves joist stiffness

Smaller joist spacing Improves floor stiffness

Strutting in perpendicular direction of the span Improves floor stiffness perpendicular to joists Helps floor to act as a system

Double or multiple spans Decreases deflection Care should be taken when designing continuous joists There is the possibility of vibration being transmitted betweencompartments (such as from room to room in a hotel)

GENERAL FLOOR PERFORMANCE

The performance of a floor is a subjective matter, expectations differ significantly between individuals. The mainperformance criteria being the quietness and amount of deflection. Minimum standards are governed by currentlegislation but may not give the personal expected performance. The most important factor influencing floorperformance is stiffness. Improving stiffness decreases deflection, bounce and vibration.

FINNFRAME FLOOR DESIGNFinnframe floor design is based on three elements according to EC5 design methods.

• Strength under maximum ultimate limit state design loads.• Deflection under serviceability limit state loads.• Floor vibration control by: - limiting the deflection under 1kN point load.

- limiting the lowest natural frequency to eliminate resonance.

FLOOR PERFORMANCE CLASSESFinnframe floor design has 3 performance classes:

FINNFRAME STANDARD CLASS• Meets the performance requirements according to UK Building Regulations.

FINNFRAME STANDARD 12 CLASS• Meets the requirements of the Building Regulations and the requirements of the NHBC Standards chapter 6.4.

FINNFRAME IMPROVED CLASS• Enhanced floor performance requirements over Finnframe Standard Class. The improved class introduces vibration

and bounce checks as well as long term creep deflections under Eurocode 5. These checks are introduced toaccommodate the longer spans Finnframe products can achieve over standard timber.

uinst Static deflection under instantaneous load (dead and live load combined).ufin Static deflection under instantaneous deflection and deflection due to creep deformation.u1 kN point load Static deflection under 1kN point load.

PROPERTY FINNFRAME STANDARD CLASS FINNFRAME STANDARD 12 CLASS FINNFRAME IMPROVED CLASS(BS5268-2:2002) (In accordance with NHBC standards 6.4)

uinst L/333 or 14mm L/333 or 12mm L/350 or 12mm

uf in L/200 L/200 L/250

u1 kN point load - - <1.75mm

Lowest natural frequency f1 - - >8 Hz

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FLOOR PERFORMANCE

IMPROVING FLOOR PERFORMANCE

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In any floor design the weights of the applied loads must be calculated. The permanent loads or dead loads arethose that form the structure and finishes. The imposed or live loads are those considered appropriate for theuse of the floor such as furniture or human foot traffic. Live load information can be obtained from BS6399.

FLOOR DECKING kN/m2

18mm Chipboard 0.13

22mm Chipboard 0.16

15mm OSB 0.11

18mm OSB 0.13

15mm Plywood 0.10

19mm Plywood 0.12

16mm S.W. Boarding 0.08



CEILING FINISHES kN/m2

5mm Plaster Skim 0.06

12.5mm Plasterboard 0.12

15mm Plasterboard 0.14

19mm Plasterboard 0.18

12.5mm Fire Check Board 0.12

PARTITION LOADS kN/m2

12.5mm Plasterboard on

both sides of the timber 0.29

INSULATION kN/m2

Glass Wool Slab per 25mm depth 0.01

Glass Wool Quilt per 25mm depth 0.02

Chipboard refers to moisture resistant chipboard P4 and P5 to BS EN 312.

OSB 3 to EN 300.

Plywood to be to the requirements of BS5268 part 2.

SCHEDULE OF MATERIAL DEAD WEIGHTS

DESIGN OF FLOORSThe weight of the construction together with the proposed live load is added together to form the total uniformdistributed floor loads assumed to be acting over the full floor area. The use of the span tables can be adoptedto select the appropriate Finnjoist profile section that can safely carry the uniform load. For intermediate floors inheated homes Service Class 1 can be expected.

The span tables provide joist profiles that match the span to load based on a number of key design criteria fromstrength, deflection limits and vibration limits. Finnforest recommend the higher floor performance classes forimproved performance and greater user satisfaction.

TYPICAL FLOOR CONSTRUCTION DETAILS AND WEIGHTS

Decking inaccordance withBuilding Regulations.

Decking inaccordance withBuilding Regulations.

Non-load bearingwall Max 0.8 kN/m.

Optional100mm Glass Wool Quilt (10kg/m3).

Optional100mm Glass Wool Quilt (10kg/m3).

15mm plasterboard or12.5mm fire resistantplasterboard.

15mm plasterboard or12.5mm fire resistantplasterboard.

Total dead load = 0.5 kN/m2

Including self weights of Finnjoist. Total dead load = 0.75 kN/m2

Including self weights of Finnjoist.

Finnjoist.

Finnjoist.

WEIGHTS OF MATERIAL

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DOMESTIC FLOOR (no partitions above) DOMESTIC FLOOR (non-load bearing partitions above)

INTERMEDIATE FLOOR 0.75kN/m2 DEAD LOAD ALLOWANCE

Standard domestic floor condition with allowance for non-loadbearing partitions up to 0.8kN/m.Maximum clear span (L) for single span conditions.Performance classes as defined on page 10.

General Notes:

a. Finnforest recommend that the decking is to be glued and fixed inaccordance with British Standards. This can significantly improve thefloor performance.

b. Deeper I-Joists will perform better than shallower I-Joists due tobetter deflection performance.

c. The depth of the floor decking influences performance with deeperfloor decking improving stiffness.

d. Appropriate strutting of the joists may increase the floor stiffness.Consult Finnforest for advice (01205 883 835).

e. Correct bearing line and level is essential for in-service performance.f. When using joist hangers ensure the correct joist hanger matched to

joist type is used and that all nails are correctly specified and used.g. Avoid using unspecified nails into the sides of the flange as this can

lead to splitting.h. On no account is the flange to be cut. For service holes refer to holes

tables on page 26.i. Other span tables are available on request.

Design Span

Clear Span (shown)

Overall Length

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FINNJOIST (FJI) SPAN TABLE

Span Table notes

1. Service Class 1 is suitable for intermediate floors in normal heateddomestic dwellings. For other applications, please contact FinnforestTechnical Support (01205 883 835) or your local distributor.

2. All loads are assumed to be uniformly distributed.3. Load sharing and adequate lateral restraint to the flanges is taken

account of in the design. Joist span tables assume that ceiling anddecking is fixed in accordance with the appropriate British Standards.

4. Spans are clear spans i.e. between supports. Minimum end bearinglength required is 45mm.

5. The applied live load is 1.5kN/m2 for single occupancy domestic dwellings.

6. Web stiffeners are not required for the spans listed above unless hangers do not laterally restrain the top flange.

7. The dead load condition for this table is based on the floor make-upshown on page 11.

8. Dead load condition is based on 22mm particle board decking and a15mm plasterboard ceiling plus an allowance for non-load bearingpartitions up to 0.8kN/m.

9. Performance classes as defined on page 10.10. Span tables are calculated in accordance with EC5.11. Consult Finnforest Technical Support for further information and

conditions outside of the tables (01205 883 835) or your local distributor.

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STANDARD CLASS STANDARD 12 CLASS IMPROVED CLASS

JOIST FLANGE CLEAR SPANS (m) CLEAR SPANS (m) CLEAR SPANS (m)

DEPTH WIDTH SPACING OF JOIST CENTRES (mm) SPACING OF JOIST CENTRES (mm) SPACING OF JOIST CENTRES (mm)(mm) (mm) 600 480 400 300 600 480 400 300 600 480 400 300

200 38 3.262 3.539 3.780 4.189 3.262 3.539 3.780 4.126 3.203 3.453 3.624 3.87745 3.451 3.745 4.000 4.435 3.451 3.745 3.987 4.303 3.388 3.662 3.843 4.11158 3.751 4.073 4.352 4.771 3.751 4.040 4.242 4.581 3.682 3.998 4.195 4.47789 4.309 4.665 4.901 5.294 4.208 4.474 4.701 5.080 4.208 4.474 4.701 4.965

220 38 3.614 3.918 4.184 4.630 3.614 3.918 4.122 4.446 3.548 3.815 4.003 4.28245 3.822 4.146 4.427 4.829 3.822 4.093 4.297 4.637 3.753 4.045 4.244 4.51458 4.155 4.509 4.763 5.140 4.099 4.353 4.571 4.935 3.079 4.353 4.571 4.80189 4.731 5.027 5.280 5.703 4.535 4.820 5.065 5.473 4.535 4.820 5.065 5.323

240 38 3.885 4.212 4.496 4.882 3.885 4.142 4.347 4.689 3.815 4.094 4.296 4.55345 4.109 4.455 4.720 5.091 4.066 4.317 4.531 4.889 4.035 4.317 4.525 4.74458 4.466 4.784 5.022 5.419 4.322 4.590 4.820 5.203 4.322 4.590 4.811 5.04589 4.987 5.299 5.566 6.011 4.781 5.082 5.339 5.769 4.781 5.082 5.334 5.592

300 38 4.648 4.931 5.174 5.579 4.461 4.734 4.968 5.358 4.461 4.734 4.923 5.16145 4.842 5.138 5.392 5.815 4.647 4.932 5.177 5.585 4.647 4.932 5.127 5.37658 5.146 5.462 5.734 6.187 4.937 5.242 5.503 5.940 4.937 5.242 5.449 5.71389 5.692 6.047 6.351 6.859 5.458 5.800 6.093 6.582 5.458 5.800 6.036 6.329

360 45 5.299 5.623 5.900 6.363 5.085 5.397 5.665 6.111 5.085 5.394 5.580 5.85158 5.629 5.974 6.271 6.766 5.400 5.734 6.019 6.496 5.400 5.730 5.928 6.21589 6.223 6.611 6.943 7.496 5.967 6.341 6.661 7.195 5.967 6.341 5.563 6.880

400 45 5.724 6.073 6.373 6.873 5.493 5.830 6.119 6.600 5.493 5.800 6.000 6.29058 6.077 6.450 6.770 7.304 5.830 6.190 6.499 7.013 5.830 6.158 6.370 6.67989 6.715 7.133 7.491 8.088 6.439 6.842 7.187 7.763 6.439 6.814 7.048 7.389

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TECHNICAL SPECIFICATIONS, STANDARDS AND DIMENSIONSThe structure of Kerto-Q improves the lateral bending strengthand stiffness of the panel, and increases the shear strength whenused as a beam. With cross bonded veneers (one fifth of theveneers are glued crosswise at 90o), there is also an essentialreduction in dimensional variations in depth due to moisture.

Kerto-Q is the ideal choice for use as a rimboard with its strength,straightness and dimensional stability.

Kerto-Q is available in widths of 27, 33, 39, 45 and 69mm withdepths to suit Finnjoist depths.

Kerto-Q Rimboard.

Kerto-Q Closure Panel.

EXPRESSED IN % FOR A MOISTURE VARIATION OF 1% x MEASUREMENT (mm)

Length 0.01 %Depth 0.03 %

Thickness 0.24 %

13.2 8.9 5.2 2.3 9500 570

BENDING TENSION PARALLEL COMPRESSION SHEAR MODULUS OF MODULUS OFAS A JOIST TO GRAIN PERPENDICULAR AS A JOIST ELASTICITY RIGIDITY

(Fb) N/mm2 (Ft) N/mm2 TO GRAIN (Fc) N/mm2 (Fv) N/mm2 (E) N/mm2 (G) N/mm2

For further design information see Kerto BBA Certificate No. 00/3717.

Example: A 240mm deep beam with a moisture change from 10% to 15% = a 5% change

∴ 5 x 240mm x 0.03% = 0.36mm increase in depth.

KERTO-Q DIMENSIONAL VARIATIONS

KERTO-Q PERMISSIBLE GRADE STRESSES

* Allowable stress design values for use with BS5268.

KERTO-Q DESIGN VALUES*

KERTO-Q RIMBOARD

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* Use only as two or more ply beams.** Allowable stress design values for use with BS5268.

KERTO-S SECTIONAL PROPERTIES

BEAMS & LINTELS DESIGN PROPERTIESTECHNICAL SPECIFICATIONS, STANDARDS AND DIMENSIONSKerto-S unites excellent technical performance with ease of use.Strength, dimensional precision and stability are the essential qualitiesof Kerto-S. As a beam it is the perfect choice whenever therequirements include long spans and minimal deflection.

Kerto-S is also ideal for use as elements in roofs, floors and wallssuch as purlins, beams, joists and lintels.

KERTO-S DESIGN VALUES**

200 39 76 247 2410 5.06 11.15 3.8845 88 285 2781 5.83 12.87 4.4875 146 475 4634 9.72 21.45 7.4690 176 570 5561 11.67 25.74 8.95

220 39 86 315 3461 6.35 12.58 4.3845 99 363 3993 7.33 14.52 5.0575 165 605 6655 12.21 24.20 8.4290 198 726 7986 14.65 29.04 10.10

240 39 94 374 4493 7.48 13.73 4.7745 108 432 5184 8.64 15.84 5.5175 180 720 8640 14.39 26.40 9.1890 216 864 10368 17.27 31.68 11.02

300 39 * 117* 585 * 8775 * 11.41* 17.16 * 5.97*45 135 675 10125 13.16 19.80 6.8975 225 1125 16875 21.94 33.00 11.4890 270 1350 20250 26.33 39.60 13.77

360 39 * 137* 796 * 13934 * 15.26* 20.02* 6.96*45 * 158* 919 * 16078 * 17.61 * 23.10 * 8.03*75 263 1531 26797 29.35 38.50 13.3990 315 1838 32156 35.22 46.20 16.07

400 39 * 156 * 1040 * 20800 * 19.64* 22.88* 7.96*45 * 180 * 1200 * 24000 * 22.66* 26.40* 9.18 *75 300 2000 40000 37.77 44.00 15.3090 360 2400 48000 45.33 52.80 18.36

DEPTH BEAM AREA SECTION MODULUS SECOND MOMENT MOMENT SHEAR WEIGHT(mm) WIDTH 102 mm2 ABOUT X-X 103 mm3 OF AREA CAPACITY CAPACITY Kg/m

(mm) ABOUT X-X 104 mm4 kN-m kN

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KERTO-S USED AS BEAM

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KERTO-S PERMISSIBLE GRADE STRESSES

KERTO-S MINIMUM BEARINGS

Permissible stresses are applicable to long term load duration.For further design information see Kerto BBA Certificate No. 00/3717.

Notes:

1. Minimum allowable bearing length is 38mm for endbearings and 89mm for intermediate bearings. For Masonry Construction see detail M1.

2. Table values are based on a support with an allowablebearing stress of 3.2 N/mm2. If a lower strength support is used, appropriate bearinglengths must be calculated.

3. Lateral restraint must be provided at end bearings.

Notes:

1. Beam span is defined as clear span (between support points).

2. The tabulated values are loads (kN/m) that can be applied to the beam in addition to the self weight of the beam.

3. Proper bearing must be provided. Bearing length must be checked for support reaction with the minimum bearing table above.

4. To prevent buckling, lateral restraint is required on the compression edge of Kerto-S beams at 600mm centres or closer. This restraint is normally provided by decking and or framing members. Beams that are not laterally supported at 600mm centres or less require special design.

BENDING TENSION PARALLEL COMPRESSION SHEAR MODULAS OF MODULAS OFAS A JOIST TO GRAIN PERPENDICULAR AS A JOIST ELASTICITY RIGIDITY(Fb) N/mm2 (Ft) N/mm2 TO GRAIN (Fc) N/mm2 (Fv) N/mm2 (E) N/mm2 (G) N/mm2

19.5 13.5 3.2 2.2 13500 600

39

45

75

90

BEAM WIDTH(mm) 5 10 15 20 25 30 35 40

REACTION (kN)

MINIMUM - BEARING LENGTHS (mm)

40 80 120 160 200 240 280 321

38 69 104 139 174 208 243 278

38 42 63 83 104 125 146 167

38 38 52 69 87 104 122 139

DEPTH (mm) DEPTH (mm) DEPTH (mm) DEPTH (mm) DEPTH (mm) DEPTH (mm)CLEAR 195 220 240 300 350 400

SPAN (m) WIDTH (mm) WIDTH (mm) WIDTH (mm) WIDTH (mm) WIDTH (mm) WIDTH (mm)39 45 75 90 39 45 75 90 39 45 75 90 45 75 90 75 90 75 90

1.5 14.18 16.36 27.27 32.73 16.78 19.36 32.27 38.72 18.30 21.12 35.20 42.24 26.40 44.00 52.80 51.33 61.60 58.67 70.402 7.21 8.31 13.85 16.63 9.66 11.15 18.58 22.30 11.84 13.66 22.77 27.33 19.80 33.00 39.60 38.50 46.20 44.00 52.802.5 4.05 4.68 7.80 9.36 5.56 6.41 10.68 12.83 6.93 8.00 13.33 16.00 13.66 22.77 27.33 30.80 36.96 35.20 42.243 2.47 2.85 4.75 5.71 3.44 3.97 6.62 7.93 4.34 5.00 8.33 10.01 8.85 14.75 17.70 21.33 25.61 28.47 34.163.5 1.61 1.86 3.10 3.71 2.25 2.60 4.33 5.20 2.87 3.31 5.52 6.61 5.99 9.98 11.99 14.75 17.70 20.33 24.414 1.10 1.27 2.12 2.54 1.55 1.79 2.98 3.58 1.98 2.29 3.82 4.57 4.21 7.02 8.43 10.53 12.64 14.75 17.704.5 0.78 0.90 1.50 1.81 1.11 1.28 2.13 2.56 1.42 1.64 2.73 3.28 3.06 5.10 6.12 7.73 9.29 10.97 13.164.8 0.63 0.73 1.22 1.45 0.89 1.03 1.72 2.06 1.14 1.32 2.20 2.64 2.47 4.12 4.94 6.25 7.51 8.88 10.665 0.54 0.62 1.03 1.24 0.76 0.88 1.47 1.76 0.98 1.13 1.88 2.26 2.12 3.53 4.24 5.40 6.47 7.68 9.235.2 0.46 0.53 0.88 1.06 0.65 0.76 1.27 1.51 0.84 0.97 1.62 1.94 1.83 3.05 3.66 4.67 5.60 6.68 8.025.5 0.37 0.43 0.72 0.85 0.53 0.61 1.02 1.21 0.68 0.78 1.30 1.56 1.48 2.47 2.96 3.80 4.55 5.45 6.555.7 0.32 0.37 0.62 0.74 0.46 0.53 0.88 1.06 0.59 0.68 1.13 1.36 1.29 2.15 2.58 3.32 3.98 4.78 5.746 0.26 0.30 0.50 0.61 0.37 0.43 0.72 0.86 0.48 0.56 0.93 1.11 1.06 1.77 2.12 2.73 3.28 3.97 4.75

DESI

GN

KERTO-S PERMISSIBLE UNIFORM LOADS KN/M

building systemsDE

SIGN

16

90mm wide beams. 135mm wide beams. 180mm wide beams.

50mm

50mm 50mm 50mm

50mm 50mm 50mm

1. All values are for long term load duration. Apply factors 1.12 and 1.25 for medium (roof) and short term (wind) loads respectively.

2. Use spacing patterns above.

3. 39mm Kerto-S may be used in place of 45mm for details A,B and E. When using multiple ply 39mm Kerto-S, 75mm long nails may be used in place of 90mm long nails.

Detail A Detail B Detail C Detail D Detail E Detail F

MAXIMUM TOTAL UNIFORM LOAD FROM EITHER SIDE FOR SIDE LOADED BEAMS (kN/m)Detail 3.35ø x 90mm Nails 3.75ø x 90mm Nails 4.0ø x 90mm Nails M12-4.6 Grade Bolts in 2 RowsRef. 2 Rows 3 Rows 4 Rows 2 Rows 3 Rows 4 Rows 2 Rows 3 Rows 4 Rows 600mm c/c 300mm c/c

Nails at 300mm c/c Nails at 300mm c/c Nails at 300mm c/c

A 5.35 8.02 10.69 6.16 9.24 12.32 6.44 9.66 12.88 10.02 20.04

B 4.01 6.02 8.02 4.62 6.93 9.24 4.83 7.25 9.66 6.85 13.70

C 4.01 6.02 8.02 4.62 6.93 9.24 4.83 7.25 9.66 12.16 24.34

D 3.56 5.35 7.13 4.11 6.16 8.21 4.29 6.44 8.58 10.40 20.80

E - - - - - - - - - 6.09 12.18

F - - - - - - - - - 19.77 39.55

Side Loads are not recommended for 180mm beams (or 4 Ply - 39mm) unless equally applied to both faces.

KERTO-S MULTIPLE PLY BEAMSSIDE LOADED

Joists applied to one or both sides of the beam. Select thesuitable nailing or bolting pattern from the table on page 17 tosuit the applied load.

Side loads are not recommended for 180mm wide beamsunless applied equally to both beam faces.

2 pieces 45mm 3 pieces 45mm 1 piece 45mm1 piece 90mm

2 pieces 45mm1 piece 90mm

4 pieces 45mm 2 pieces 90mm2 pieces 75mm

75mm

75mm

75mm

75mm

SIDE LOADED

SIDE LOADED

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building systems

DESI

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TOP LOADED

KERTO NAIL AND BOLT SPACING

TOP LOADED BEAM

Rows of nails at 300 c/c Depth2 <300

3 300 - 450

4 450 - 600

300 300

150

50

50

50

50

75

75

2 Rows of Nails.

3 Rows of Nails.

All measurements in mm.

300 300

100 100

2 Rows of Bolts spaced at 600mm or 300mm centres,provide 36mm diameter x 3mm thick washers underbolt head and nut. Bolts must not be countersunk.

600 or 300

equal equal

4 Rows of Nails.

300 300

75 75 7575

50

50

TOP LOADED

NAIL AND BOLT SPACINGFOR TOP AND SIDE LOADED BEAMS

For a downstand beam with joists above, fix plys using 3.35 x 90mm nails at 300mm c/c. For discontinuous joists, if loads are not applied equally on each ply, please refer to the table on side loaded beams.

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building systems

CHARACTERISTIC VALUESKERTO FOR USE WITH EUROCODE 5 ONLY

DESI

GN

PROPERTY SYMBOL KERTO-S KERTO-Q USED FOR(27-69mm)

5th Percentile ValuesBending StrengthEdgewise fm,0,edge,k 44.0 32.0 N/mm2

Size effective parameter s 0.12 0.12Flatwise fm,0,flat,k 50.0 36.0 N/mm2

Tension StrengthParallel to the grain ft,0,k 35.0 26.0 N/mm2

Perpendicular to the grain edgewise ft,90,edge,k 0.8 6.0 N/mm2

Compression StrengthParallel to the grain fc,0,k 35.0 26.0 N/mm2

Perpendicular to the grain edgewise fc,90,edge,k 6.0 9.0 N/mm2

Perpendicular to the grain flatwise fc,90,flat,k 1.8 1.8 N/mm2

Shear StrengthEdgewise fv,0,edge,k 4.1 4.5 N/mm2

Flatwise fv,0,flat,k 2.3 1.3 N/mm2

Modulus of ElasticityParallel to the grain stability design only E0,k 11600 8800 N/mm2 Stability design only

Shear ModulusEdgewise stability design only G0,k 400 400 N/mm2 Stability design only

Density connection design only k 480 480 kg/m3 Connection design only

Mean ValuesModulus of ElasticityParallel to the grain deflection design E0,mean 13800 10500 N/mm2 Deflection design

Shear ModulusEdgewise deflection design G0,mean 600 600 N/mm2 Deflection design

Density weight & loading mean 510 510 kg/m3 Weight & loading

FINNJOIST FOR USE WITH EUROCODE 5 ONLY

200-38 2.32 6.17 0.241 7.61 1.539 7.86 8.37 15.22 15.22200-45 2.60 7.44 0.287 7.89 1.539 8.68 8.68 15.78 15.78200-58 3.13 9.78 0.372 8.40 1.539 9.24 9.24 16.80 16.80200-89 4.39 15.18 0.574 8.68 1.539 9.54 9.54 17.35 17.35220-38 2.48 7.16 0.323 9.22 1.809 7.86 9.49 15.61 17.23220-45 2.76 8.62 0.385 9.56 1.809 8.93 10.51 17.73 19.12220-58 3.29 11.32 0.499 10.18 1.809 10.91 11.20 20.36 20.36220-89 4.55 17.56 0.770 10.51 1.809 11.57 11.57 21.03 21.03240-38 2.61 7.96 0.399 10.31 2.025 7.86 9.49 15.61 17.23240-45 2.89 9.58 0.474 10.69 2.025 8.93 10.56 17.73 19.35240-58 3.42 12.57 0.614 11.38 2.025 10.91 12.52 21.66 22.76240-89 4.68 19.48 0.948 11.76 2.025 12.93 12.93 23.51 23.51300-38 2.99 10.42 0.676 12.45 2.673 7.86 9.49 15.61 17.23300-45 3.28 12.51 0.803 12.90 2.673 8.93 10.56 17.73 19.35300-58 3.80 16.38 1.038 13.74 2.673 10.91 12.54 21.66 23.28300-89 5.06 25.30 1.598 14.19 2.673 12.98 14.61 25.76 27.39360-45 3.60 15.02 1.147 14.04 3.213 8.93 10.56 17.73 19.35360-58 4.12 19.62 1.480 14.95 3.213 10.91 12.54 21.66 23.28360-89 5.38 30.23 2.273 15.44 3.213 12.98 14.61 25.76 27.39400-45 3.92 17.58 1.557 16.61 3.753 8.93 10.56 17.73 19.35400-58 4.44 22.91 2.005 17.69 3.753 10.91 12.54 21.66 23.28400-89 5.70 35.22 3.073 18.27 3.753 12.98 14.61 25.76 27.39

JOIST WEIGHT MOMENT FLEXURAL SHEAR SHEAR CAPACITY RIGIDITY CAPACITY RIGIDITY NS S NS S

kg/m kNm Nmm2 x 1012 kN Nx106 kN kN kN kN

END BEARING45mm

INTERMEDIATE BEARING89mm

TYPE

Please refer to page 9 for notes.

building systems

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19

The Finnforest Finnseal has been developed to offer a simple, fast and engineered solution to achievingcompliance with the requirements of the Building Regulations.

• The Finnforest Finnseal is a machined and treated timber product, designed to be fitted to the end of theFinnjoist to provide a fast, simple and efficient solution to the requirements of the Building Regulations.

• The Finnseal is machined to provide a secure fit when nailed to the end of the Finnjoist. • The Finnforest Finnseal is supplied treated to provide a shield to the Finnjoist in the event of elevated moisture

levels in the cavity.• The Finnforest Finnseal removes the need for sealing around the perimeter of the I-Joist

with mastic.

The Finnforest Finnseal is accepted for use in external walls by both the NHBC and Zurich. The FinnforestFinnseal has been assessed to provide compliance to parts A, B, E & L of the Building Regulations (Structure,Fire, Sound and Air Leakage).

AIR LEAKAGEThe Finnforest Finnseal has been tested for air leakage by CERAM (Report SW045/05) in depths of 220, 240 and300mm and widths of 38, 45, 58 and 89mm. This detail has been shown to be almost twice as effective assome currently accepted methods of demonstrating compliance to the requirements of Part L.

FIREThe Finnforest Finnseal has been assessed by Chiltern Fire (report FEE/F05012) as providing an adequate firestop for use in both external and party walls.

SOUNDWhen using the Finnforest Finnseal in a party wall situation, it is necessary to refer to the information providedby Robust Details Ltd. The Finnforest Finnseal can comply with the details provided in the section‘Separating Wall-Cavity Masonry’ details E-WM - 1 to 6. Please also refer to appendix A regarding proprietaryjoist caps/ends.

WORKING PLATFORMProvided the Finnforest safe loading chart is followed, there is no need for additional propping to the floor duringconstruction. Should Finnseals be used in conjunction with Masonry Hangers, it will be necessary to contactFinnforest or the hanger manufacturer for further information.

FINNSEAL

20

building systems

90mm minimum bearing. Finnjoists or Kerto must

not extend into cavity. Minimum 45mm bearing

for internal walls.

Full depth blocking orMinimum 38mm x 38mm perimeter nogginfor floor deck support. Similar noggin may

be required for ceiling edge support.Noggin to be set 15mm

to 25mm from wall.Noggin skew nailedor fixed using Z clip.

For single skin externalwall construction usemasonry hangers.

Finnseal fitted using 1no3.35mm nail per flange.

Full depth blocking or minimum38mm x 38mm perimeter noggin forfloor deck support. Similar nogginmay be required for ceiling edgesupport. Noggin to be set 15mmto 25mm from wall. Noggin skew nailed or fixed using Z clip.

Mortarinfill.

For single skin externalwall construction usemasonry hangers.

Plastic Sleeve to be fitted inaccordance withmanufacturer’s instructions.

Full depth blocking or minimum38mm x 38mm perimeter noggin for floordeck support. Similar nogginmay be required for ceiling edgesupport. Noggin to be set 15mmto 25mm from wall. Noggin skew nailed or fixed using Z clip.

Restraint strap where required.

Plastic stiffeners to beinserted where required, inaccordance with sleevemanufacturer’s instructions.

Web stiffeners must be fitted to the ends of I-Joists. The ends of all joists and beams should be sealed with silicon mastic as per NHBC detail.

Installation note: Ensure bearings are flat, level and that the Finnjoists or Kerto are vertical.

Installation Note: Ensure bearings are flat, level and that the Finnjoists are vertical.

For single skin externalwall construction use masonry hangers.

M7a&b

M1c

M3/M4

M5a&b

MASONRY CONSTRUCTION

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The following details are representations of the type of detailing for Finnframe floor construction when used within masonry walled buildings.

The building designer is responsible to ensure that details are appropriate for the end application.

Please ensure all solid timber used with Finnjoist is dried to the suitable Service Class level.

M1b

M2a&b

Cavity Wall (Plastic sleeve)M1c

M1a Cavity Wall (I-Joists built in) Cavity Wall (Finnseal)M1b

Timber blocking equal to halfthe joist depth.

Solid blocking between I-Joist and wall.

25mm space between wall and

Finnjoist flange.

Cross Section5 x 30mm galvanisedrestraint straps to walldesigner’s spacing.

Do not cut flange.Strap located in slot in web.Care is needed to form slot.Strap continuous through38mm x 8mm deep slot in webs.

Restraint Strap (I-Joist parallel to wall)M2a

90mm minimum bearing. Finnseal must not extend into cavity.Minimum 45mm bearing forinternal walls.

Installation Note: Ensure bearings are flat, level and that the Finnjoists are vertical.

21

building systems

Internal Wall (no masonry wall above)M5a

Internal Wall (I-Joists ending on wall, no masonry wall above)

M5b Internal Wall (masonry wall above)M6

Steel Beam (I-Joist hanger/blocking to suit design)M7a Steel Beam (masonry above)M7b

Perimeter noggin for floordeck support. See M1.

Web stiffener wherespecified.

Restraint straps fixedto I-Joist flangeusing minimum 8 no.3.75 x 30mm squaretwist nails.

Hi-Load, PFS ortwisted strapor similar to walldesigner's spacing.

Approved masonry hanger.Consult strap manufacturer’s

literature for further information.

Internal full height blocking fornon load bearing or timber loadbearing wall above. Blockingalso required if joists are notcontinuous over wall. KertoBlocking may be used whererequired by design.

Building designer to ensurecompliance with Part E of theBuilding Regulations.

Note: 89mm minimum bearing forcontinuous joist over wall. Wallbearing to be flat and appropriateblock/brick strength.

Joists lapped wherenot continuous overinternal wall.

Web stiffenerwhere specified.

Blockwork may be built uparound I-Joists or blockingpieces used to restrain the ends of I-Joists.

Mortar fill maybe required.

Ensure minimum bearingrequirements are met.

Web stiffenerwhere specified.

Web stiffenerwhere specified.Note:

89mm minimum bearing for continuous I-Joists over wall. Wall bearing to be flat and appropriate block/brick strength.Fill all voids with dry mortar packing.

Minimum 45mm bearing fordiscontinuous joists.

Perimeter noggin for floordeck support. See M1.

Timber bearing plate flush with wall faces orflange of beam, as appropriate.

Suitable hangers may be shot fired to steel.

See hangermanufacturer’s

details.

Face Fix hangersmay be fixed to

timber packer. Thesteel beam designer

is to ensureadequate fixing of

packer to steel.Steel beam packer to be specified by steel I-Beam designer.

Web stiffener where specified.

Steel beam andpacker to be

specified by steel I-Beam designer.

Masonry hangers to be usedif blockwork is built onto

steel. See hangermanufacturer’s details.

Perimeter noggin for floor deck support. See M1.

Web stiffenerwhere required.

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Restraint Strap (I-Joist perpendicular to wall)M4

Cross Section

I-Joist or Solid timber blocking piecesattached to joists using Z-clips strap asmanufacturer’s details.

25mm space between walland Finnjoist flange.

Full depth I-Joist or 38 x150mmblocking between joists.

Hi-Load or PFS strap or similar to walldesigner’s spacing.

Restraint strap fixed toblocking using minimum8no. 3.75 x 30mm squaretwist nails.

Consult strapmanufacturer’s literaturefor further information.

Web stiffener where specified. Perimeter noggin for

floor deck support. See M1.

Wall restraint may be required as perBuilding Regulations or building designer’srecommendations. See M4.

Approvedmasonry

hanger.

Restraint Strap (I-Joist parallel to wall)M2b Masonry HangerM3 (alternative details may apply, contacthanger manufacturer for information)

TF6

TF5

TF1a&bTF3 TF2a&b

TF4a,b&c

22

building systems

Kerto-Q Rimbeam Parallel to JoistsTF2a

Kerto-Q Rimbeam perpendicular to JoistsTF1b

Fix Kerto rimboard to each Finnjoistusing one 3.35 x 65mm nail per flange.

38 x 50mm batten to give additionalbearing to decking if required.

Kerto or Finnjoist can be used as blocking. Check for fire resistance requirements.

Kerto-Q rimboard.

Skew nail Kerto-Qrimboard 3.75 x 75mmat 150mm centres nailedfrom outside of building.

Note: Fire, thermal andacoustic resistance

detailing may berequired. Consult

Technical Support.

Minimum bearing of

45mm.

Load bearing wall.

Expansion gap

TIMBER FRAME CONSTRUCTION

Ensure header joist rimboardis tied to floor zone by deckingto building designer’s details.Where decking expansion gapis required alternative supportis required (see TF2b).

Thermal insulation and firerequirements to buildingdesigner’s specification. Where27mm rimboard is used withdetails A or C, additionalstability blocks required at600mm centres.

A

B C

Kerto-Q Rimbeam Parallel to JoistsTF2b

Thermal insulation and fire requirementsto building designer’s specification.

Where 27mmrimboard is usedwith details A or

C additionalstability blocks

required at600mm centres.

Minimum 18mm bearingrequired for decking. Useadditional 38 x 50 battenif required.

TF1a

Fix Kerto rimboard to eachFinnjoist using one3.35 x 65mm nail perflange.

Kerto-Q rimboard.

Skew nail Kerto-Qrimboard 3.75 x 75mm at150mm centres nailedfrom outside of building.

Note: Fire, thermal andacoustic resistance

detailing may berequired. Consult

Technical Support.

Minimum bearing of

45mm.

Load bearing wall.

Kerto-Q Rimbeam perpendicular to Joists

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The following details are representations of the type of detailing for Finnframe floor construction when used within platform timber frame buildings.


A

CB

Kerto orFinnjoist can be

used as fulldepth blocking

(blockingomitted for

clarity).

23

building systems

Compression Block(for high loads contact Technical Support)

TF5

Party WallsTF6 Disproportionate CollapseTF7

Typical Finnjoist to support nailingTF8

Timber Load BearingInternal Wall Above

T4a

Web stiffener maybe required.

Finnjoist, or Kerto blockingif design requires

additional strength/firerobustness.

89mmminimumbearingsupport.

Kerto rimboard.

Solid block or cripplestuds to full height offloor zone.

Finnjoistbearing as

normal.

Min 33mm Kerto rimboard.

Min 45mm Kerto blocking.

Min 45mm Kerto blocking.

Insulation/timber frame detailing omitted for clarity(plasterboard to regulation requirements).

Finnjoist Perpendicular Finnjoist Parallel

Solid packer tofull void blockingbetweenFinnjoistand blocking.

Cantilevered Joist ConditionTF3

Finnjoist or Kertoblocking.

Kerto-Q closurepanel attached to

ends of joists using 1 No. 3.37 x 75mm

nail per flange.

Web stiffeneror sidereinforcementmay berequired oneach side ofFinnjoist.

Consult Technical Supportfor further information.

To joist design

Alternative party wall option(typical disproportionate collapse detail).

Kerto Ring Beam.

Joist hanger.

Drive nails at an angle.

Kerto rimboard.

At each side ofFinnjoist nail one3.35mm x 65mm.

Ensure at least 40mm from end to

avoid splitting.

Window/Door Lintel DetailTF9

Finnjoist Perpendicular Finnjoist Parallel

Note: Fire, thermaland acoustic

resistance detailingmay be required.

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Joists Ending onInternal Wall

T4c

Finnjoist or Kertoblocking.

Web stiffenermay be required.

Load bearinginternal wall.

Timber Load Bearing Internal Wall Above

T4b

10mm minimumexpansion gap each

side of studwork.

Double Finnjoist or Kertoblocking if design requires

additional strength/firerobustness.

Note: Centre line ofblocking to line throughwith edges of studwork

38 x 50 battenwhereadditionalbearing isrequired fordecking.

Web stiffenermay berequired.

89mm minimumbearing support.

Finnjoist.

Kerto rimboard.

Kerto-S lintel.Provideadequatebearing.

24

building systems

GENERAL FLOOR CONSTRUCTION

The following details are general detailing and construction representations for Finnjoist used as the structural members in floors.


Please ensure all solid timber used with Finnjoist is dried to the suitable Service Class level.

Non-load bearing partition wallperpendicular and supported by I-Joists

G1Non-load bearing partition wallparallel - supported by I-Joists

G2

Connection DetailsG3 Additional Capacity Nailing(required due to uplift)

G4

The designer is responsiblefor ensuring the I-Joist

design is adequate to supportthe wall. See span tables.

Minimum 35 x 72mm noggin at 600mm c/c

use Z clip hanger.

Floor decking. Non-load bearing wallMax 0.8kN/m.

Floor decking.

Option:Additional I-Joist maybe used under wall.

Non-load bearing wall.Max 0.8kN/m.

Web stiffener if required by hanger.

Face mount or topmounted hanger.

Face fix hanger fitted with web stiffeners and fully nailed to improve uplift capacity.

All nail holes used.

Kerto or I-Joist trimmer. Kerto or I-Joist trimmer.

Kerto.

G5a&b

G3

G2

G1G4

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building systems

Mini Hanger ConnectionG6b

Finnjoist to Finnjoist JunctionG6a

Finnjoist to Finnjoist (double I-Joists)G5a

1. Minimum distance to top and bottom edge 20mm.2. Minimum distance vertically between nails 35mm.3. Minimum distance between side and nail 65mm.4. Minimum distance horizontally between nails 65mm.5. Nails to be installed from hanger face of 2ply joist and clenched where possible.

34

1

2

Typical Finnjoist Web Stiffening detailG7

25mm

25mm

Ensure gap at top.5mm min,

20mm maximum.

Refer to web stiffener table for stiffener

dimensions.

3-3.35 x 75mmnails, clenched.

Ensure tight fit.

• All Backer blocks to be minimum 250mm wide.• All web stiffeners to be minimum 100mm wide.• Use solid timber, structural ply or OSB3 to BS5268.

I-JOIST SERIES

Depth FJI 38 FJI 45 FJI 58 FJI 89

200 12 x 110 18 x 110 22 x 110 38 x 110

220 12 x 130 18 x 130 22 x 130 38 x 130

240 12 x 150 18 x 150 22 x 150 38 x 150

300 12 x 210 18 x 210 22 x 210 38 x 210

360 12 x 260 18 x 260 22 x 260 38 x 260

400 12 x 310 18 x 310 22 x 310 38 x 310

BACKER BLOCK AND WEB STIFFENER TABLE

• Filler block to be positioned centrally at hanger and at end of joist.• At the ends of 2 ply joists use 600mm wide filler blocks with 6 no. nails.• For 89mm flanged I-Joists nails must be applied from both faces.

I-JOIST SERIES FILLER BLOCK

Depth FJI 38 FJI 45 FJI 58 FJI 89 Length

200 28 x 110 38 x 110 47 x 110 79 x 110 600 12

220 28 x 130 38 x 130 47 x 130 79 x 130 600 12

240 28 x 150 38 x 150 47 x 150 79 x 150 600 16

300 28 x 210 38 x 210 47 x 210 79 x 210 600 16

360 28 x 260 38 x 260 47 x 260 79 x 260 600 16

400 28 x 310 38 x 310 47 x 310 79 x 310 600 20

FILLER BLOCK TABLE

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No.ofnails

I-Clip (double I-Joists)G5b

I-clips fitted max 200mmfrom carried member.

Install Backer blocks on both sidesof Finnjoist. Attach with 10 no. 3.75 x 75mm nails, clenched wherepossible. Backer block to be aminimum of 250mm wide.

Face mount or Topmounted hanger.

Install Backer blocks tightto top flange for topmount hangers and tightto bottom flange for facemount hangers.

Pre-install Backer blocks(where required) as perdetail G6a.

Mini hanger installed in accordance withmanufacturer’s instructions.

Carried member must be skewnailed to prevent rotation.

Install filler block tight to top flange. Nail using 4.0 x 75mm nails as per detail G5b and

Filler block table. Use 4.0 x 100mm nails for 89mm wide flanges.

Install Backer block tight to top flange. Attach with 10 no. 3.75 x 75mm nails, clenched where possible. Backer block to be a minimum of 250mm wide.

2 ply Finnjoist nailing pattern.

26

building systems

FINNJOIST ROUND HOLE DISTANCE CHART

Distance from edge of hole to inside edge of supports in mm.

HOLE CONSTRUCTION

Notes for Finnjoist hole construction:

1. DO NOT CUT OR NOTCH FLANGES

2. Cut holes carefully. DO NOT over-cut. DO NOT cut flanges. ROUND CORNERS OF RECTANGULAR HOLES WHEN POSSIBLE.

3. Holes must not be closer than 8mm from I-Joist flange.

4. For rectangular holes, avoid over-cutting the corners. Slightly roundingthe corners is recommended. Starting the rectangular hole by drilling asmall diameter hole in each of the four corners, and then making thecuts between the holes, will minimise damage to I-Joist.

5. Minimum distance for holes greater than 38mm diameter is 300mmfrom supports.

6. Do not cut holes larger than 38mm in a cantilever.

7. The length of uncut web between holes must be at least twice thelength of the longest adjacent hole dimension.

8. Pre-punched knockouts may be ignored when calculating distancesbetween holes.

9. Hole locations and sizes are based on uniformly, domestic loadedI-Joists. For other conditions please contact your Finnforest engineeredwood products distributor.

Coloured areas indicate minimum distance to support edge for holes greater than 38mm. For Notes see below.

Do not cut holes greater than 38mm in a cantilever.Minimum distance between

holes must be twice the widthof the largest adjacent hole.

A 20mm hole may bepositioned at any pointin the web.

Knockout: All open knockout holes must be at least 30mm away from the end of the beam.

Refer to Rectangular Hole Chartfor minimum distance between

the inside edge of the bearingand the edge of the hole.

Refer to Round Hole Chart forminimum distance between the insideedge of the bearing and the edge of thehole. For maximum diameter 38mmholes measure to the end of the beam.

30mm OpenKnockout

D W H

FINNJOIST (FJI) WEB

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JOIST HOLETYPE DIA 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 5.00 5.25 5.50 5.75 6.00 6.25 6.50 6.75 7.00

200 38 30 30 92 248 405 561 717 873 1030 118650 300 300 300 310 466 622 778 935 1091 124775 300 375 531 688 844 1000 1156 1313 1469 1625

100 633 789 945 1101 1258 1414 1570 1726 1883 2039220 38 30 30 30 30 30 183 339 495 652 808 964 1120

50 300 300 300 300 300 300 339 495 652 808 964 112075 300 300 300 300 425 581 738 894 1050 1206 1363 1519

100 300 375 531 688 844 1000 1156 1313 1469 1625 1781 1938240 38 30 30 30 30 30 30 84 240 396 552 709 865 1021

50 300 300 300 300 300 300 300 327 483 639 795 952 110875 300 300 300 300 300 300 446 603 759 915 1071 1228 1384

100 300 300 300 386 543 699 855 1011 1168 1324 1480 1636 1793125 326 482 639 795 951 1107 1264 1420 1576 1732 1889 2045 2201

300 38 30 30 30 30 30 30 30 30 151 307 463 620 776 932 108850 300 300 300 300 300 300 300 300 325 481 637 793 950 1106 126275 300 300 300 300 300 300 300 347 503 660 816 972 1128 1285 1441

100 300 300 300 300 300 300 370 526 682 838 995 1151 1307 1463 1620125 300 300 300 300 300 397 554 710 866 1022 1179 1335 1491 1647 1804

360 38 30 30 30 30 30 30 30 30 30 30 30 170 326 483 639 795 95150 300 300 300 300 300 300 300 300 300 300 300 329 485 641 797 954 111075 300 300 300 300 300 300 300 300 300 348 504 661 817 973 1129 1286 1442

100 300 300 300 300 300 300 300 368 524 680 836 993 1149 1305 1461 1618 1774125 300 300 300 300 300 300 375 531 687 844 1000 1156 1312 1469 1625 1781 1937

400 38 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 131 287 444 60050 300 300 300 300 300 300 300 300 300 300 300 300 300 300 300 300 446 602 75875 300 300 300 300 300 300 300 300 300 300 300 300 300 309 465 621 778 934 1090

100 300 300 300 300 300 300 300 300 300 300 300 329 485 641 797 954 1110 1266 1422125 300 300 300 300 300 300 300 300 300 348 504 661 817 973 1129 1286 1442 1598 1754

SPAN (m)

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FINNJOIST RECTANGULAR HOLE DISTANCE CHART

Distance from edge of hole to inside edge of supports in mm.

KERTOIn accordance with BS5268.

Note for Kerto:

For holes outside of this contact Finnforest Technical Support on 01205 883 835.

Holes spaced apart by at least 3 times hole diameter.

100mm minimum between holes and notches.

0.25 x span.

D

0.4 x span.

Maximum Notch Depth D/8.

0.07 x span.

0.25 x span.

Maximum Hole Diameter D/4.

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SPAN (m)JOISTTYPE 2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 5.00 5.25 5.50 5.75 6.00 6.25 6.50 6.75 7.00

200 50 300 300 300 346 503 659 815 971 1128 1284 144075 347 503 660 816 972 1128 1285 1441 1597 1753 1910

100 858 1014 1170 1327 1483 1639 1795 1952 2108 2264 2420220 50 300 300 300 300 300 300 358 515 671 827 983 1140 1296

75 300 300 300 400 557 713 869 1025 1182 1338 1494 1650 1807

100 443 599 755 911 1068 1224 1380 1536 1693 1849 2005 2161 2318

240 50 300 300 300 300 300 300 300 357 514 670 826 982 1139 1295

75 300 300 300 300 300 415 572 728 884 1040 1197 1353 1509 1665

100 300 300 448 604 760 917 1073 1229 1385 1542 1698 1854 2010 2167

125 636 793 949 1105 1261 1418 1574 1730 1886 2043 2199 2355 2511 2668

300 50 300 300 300 300 300 300 300 300 334 491 647 803 959 1116 1272 1428

75 300 300 300 300 300 300 300 440 597 753 909 1065 1222 1378 1534 1690

100 300 300 300 300 300 390 547 703 859 1015 1172 1328 1484 1640 1797 1953

125 300 300 300 340 496 653 809 965 1121 1278 1434 1590 1746 1903 2059 2215

360 50 300 300 300 300 300 300 300 300 300 300 300 324 480 636 793 949 1105 1261

75 300 300 300 300 300 300 300 300 300 419 575 731 887 1044 1200 1356 1512 1669

100 300 300 300 300 300 300 357 513 670 826 982 1138 1295 1451 1607 1763 1920 2076

125 300 300 300 300 300 443 599 755 911 1068 1224 1380 1536 1693 1849 2005 2161 2318

400 50 300 300 300 300 300 300 300 300 300 300 300 300 300 300 300 300 443 599 756 912

75 300 300 300 300 300 300 300 300 300 300 300 300 300 382 538 694 850 1007 1163 1319

100 300 300 300 300 300 300 300 300 300 300 320 476 633 789 945 1101 1258 1414 1570 1726

125 300 300 300 300 300 300 300 300 415 571 727 884 1040 1196 1352 1509 1665 1821 1977 2134

MaxH or W

(BiggestValue)

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Diagonal Bracing (19 x 89mm).See below

Temporary Stability Blocking

Temporary Stability Blocking.See below

Longitudinal Bracing (19 x 89mm). See below

2.4m max

2.4m max

1.2m

• I-Joists are unstable until laterally braced!• These instructions are offered as general recommendations and in some instances other and/or additional precautions

may be necessary.• Erection and bracing procedures and the workers’ safety are the responsibility of the builder.• Do not allow workers or construction loads on unbraced I-Joists!• These details may also be used with timber frame construction.

Longitudinal Bracing1. Use at least 19 x 89mm bracing members nailed to each I-Joist with two 3.35 x 65mm nails. Use long pieces, not short

lengths. Lap the ends to keep a continuous line of bracing.2. Braces are required at the ends of each I-Joist and at interior supports of continuous I-Joists. Keep the braces parallel

and a maximum of 2.4m apart. Longitudinal braces must be tied to a diagonally braced and blocked system at one endof each I-Joist run or joist bay.

3. Additional braces and blocking systems may be required e.g. around stairwell openings.

Diagonal Bracing1. Use at least 19 x 89mm bracing members nailed to each I-Joist with two 3.35 x 65mm nails.

Use continuous pieces. 2. Diagonal braces must be installed at one end of each I-Joist run or I-Joist bay. In long joist runs install additional diagonal

bracing systems at not more than 10m spacing. 3. Diagonal bracing must be fixed to a minimum of 3 I-Joists to cover a distance of at least 1.2m.

Temporary Stability Blocking1. Temporary stability blocking should be a minimum cross section of 38 x 125mm solid timber. Fasten with at least two

3.35 x 65mm nails at each end. Alternatively the required permanent blocking may be fitted e.g. for cantilever joists (see Finnjoist Installation details).

2. Blocking should be cut accurately to length with square ends to maintain Finnjoist centres.3. Blocking must be fixed between at least 3 I-Joists or to cover a minimum distance of 1.2m.4. Blocking must be installed at the supports of I-Joists including interior supports of continuous I-Joists where the overall

length of the Finnjoist exceeds 6.0m.5. Blocking must be installed at one end of each I-Joist run or I-Joist bay. In long joist runs install additional blocking

systems (temporary stability blocking and diagonal bracing) at not more than 10m spacing.

Construction LoadsPlease contact Finnforest Technical Support for guidance on 01205 883 835.

TEMPORARY ERECTIONBRACING SYSTEM (IN ACCORDANCE TO UKTFA GUIDANCE)

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SAFE LOADINGOF MATERIALS ON A WORKING PLATFORM

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30 MINUTEJoist Specification Finnjoist (FJI)

Floor Decking • 18mm thick OSB or ply decking

• 21mm thick softwood tongue & groove floorboards

• 22mm flooring grade chipboard

• 15mm gypsum plasterboard - BS1230: Part 1: 1985: Type 1

• 12.5mm gypsum plasterboard -BS1230: Part 1: 1985: Type 1,with 5mm plaster skim coat

• 12.5mm British Gypsum Fireline board

• 12.5mm Knauf Diamond Fire Resisting Diamond board

Downlighters Type CESCO PTR80 DWHMaximum diameter - 80mmMaximum density - 1 per 1.2m2

60 MINUTEJoist Specification Finnjoist (FJI)

Floor Decking • 18mm thick OSB or ply decking

• 21mm thick softwood tongue & groove floorboards

• 22mm flooring grade chipboard

Ceiling LiningsNail or screw fixed to • 2 no. layers of 15mm plasterboard -Finnjoist (FJI) at 150mm BS1230: Part 1: 1985: Type 1 minimum centres. Board edge noggins • 2 no. layers of 12.5mmmay be required. British Gypsum Fireline boardCeiling lining manufacturer should • 1 no. layer of 19mm Gyproc Plank be consulted for + 1 no. layer of 12.5mminstallation details. British Gypsum Wallboard

• 1 no. layer of 12.5mm KnaufDiamond Fire Resistant Wallboard (Type 5) + 1 layer of 12.5mm Knauf Diamond Wallboard (Type 1)

18mm Ply or OSB decking or 22mm moisture resistantparticleboard.

Optional 100mm Glass Wool Quilt (10kg/m3).

15mm plasterboard or 12.5mm fire resistant plasterboard.

Based on Warrington Fire Research Centre Reports: Number C117645,and Chiltern International Fire Report RF00025.

18mm Ply or OSB Decking or 22mm moisture resistantparticleboard.

Optional 100mm Glass Wool Quilt (10kg/m3).

2 layers of 15mm plasterboard or 12.5mm fire resistant plasterboard with staggered joists.

Based on Warrington Fire Research Centre Reports: Number C118649 and WARRES No. 117647.

FIRE RESISTANCE30 Minute Fire Detail

60 Minute Fire Detail

Ceiling LiningsNail or screw fixedto Finnjoist (FJI) at150mm minimumcentres. Boardedge noggins maybe required. Ceilinglining manufacturershould beconsulted forinstallation details.

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SOUND DEFINITIONSAIRBORNE Airborne sounds are audible noises such as: talking, music, television etc. Airborne sound insulation of party floorsand walls is measured as the difference between the noise source in one dwelling and the noise received in theadjacent dwelling. The higher the airborne sound value, the better the airborne sound insulation.

IMPACTImpact sounds are sound transmissions produced when a construction element vibrates due to direct impact suchas walking or jumping. Impact sound is measured as the level of noise received from one dwelling to the next. The lower the impact sound value between dwellings the better the impact sound insulation.

SOUND REQUIREMENTS FOR FLOORS

ENGLAND & WALES SCOTLAND & N.IRELANDAIRBORNE IMPACT AIRBORNE IMPACT

Single occupancy dwelling >40dB* - - -

Compartment Element** >45dB <62dB >48dB <65dB individual value

>52dB <61dB mean value

* Achieved in laboratory test.** On site testing may be required.

Source: Building Regulations Approved Document E (2003).Scottish Technical Standards Sect H (1999).

For information on compartment floors please contact Finnforest Technical Support on 01205 883 835.

Notes:1. Test results achieved November 2003 and July 2004.2. Minimum of 40dB must be achieved according

to English Building Regulations.3. Tests on a floor construction with joists at both 400mm

and 600mm centres achieved the same sound insulation.4. 40+ indicates not tested but extrapolated. 4.5. Quilt: min 100mm quilt 10kg/m 2. 5.6. All tests based on minimum flange width (38mm).7. 15mm plasterboard (wallboard) 9.9kg/m 3.8. To improve airborne sound performance we recommend

sealing the edges of floor deck to wall with non setting mastic.9. For further information please contact

Finnforest Technical Support 01205 883 835.

Rw (dB) for 18 mm 22 mm 18 mm 18 mmAIRBORNE SOUND CHIPBOARD CHIPBOARD METSÄ SPRUCE OSB/3

FJI-DEPTHNO QUILT QUILT NO QUILT QUILT QUILT NO QUILT QUILT

195/200 - - - 40 - - -

220 - - 40 41 - - -

240 40 41 40+ 40+ 40 40 41

300+ 40+ 40+ 40+ 40+ 40+ 40+ 40+

SOUND TESTS RESULTS 2003SINGLE OCCUPANCY DWELLING

Decking Material.

15mm Plasterboard.

Finnjoist.

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GROUND FLOOR INFORMATIONFinnjoist bearing - external ground below internal floor(intermediate support with cross ventilation)

Finnjoist bearing - external ground above or level with internal floor

External ground levelhigher than internal toengineer’s specifications

External cavity wall.

Subfloor ground levelto fall to outlet/drain.

Intermediate supportwith cross ventilation.

Solum cover.

75mm minimum to DPC.

Floor deck to buildingdesign specification.

Flooring insulationomitted for clarity.

Finnjoist can besupported off dry

internal cavity wallconstruction minimumbearing 90mm. Option to use joist hangers or

internal support wall.

All ventilation and solumcover to appropriate

Building Regulations.Joist hanger.Sealant.

Wall insulation.

Air flow.150mm minimum

150mm minimum.

DPC

Air flow.

DPC

25mm Air gap

Finnjoist

DPC

Treated wall plate.

External cavity wall. Subfloor ground level

to fall to outlet/drain.Intermediate supportwith cross ventilation.

Floor insulation omitted forclarity. Joists can be build-in

or supported on hangers. If built in consideration is to

damp issues - a minimumbearing of 90mm required.

All ventilation and solumcover to appropriate

Building Regulations.

Wall insulation.

Granular fill example for free drainage.

Wall designed to building designer’srequirements.

Perforated drain designed by others.

Solum cover.

75mm minimum to DPC.

Floor deck to buildingdesign specification.

Sealant.

Air flow.

Air flow.

150mm minimum

150mm min.

DPC

DPC

DPC

Treated wall plate.

25mm Air gap.

Finnjoist

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Perimeter blocking for floor deck support.Ventilation to Building Regulation anddesigner’s requirements.

Perimeter blocking for floor deck support.Ventilation to Building Regulation anddesigner’s requirements.

Notes:1. All ground floors are to be designed to service class 2.

2. Finnforest advise designing ground floors to stricter deflection limits due to increased serviceability requirements.

3. Additional bracing may be required to the underside of the I-Joists. Please contact Finnforest Technical Support 01205 883 835.

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Finnjoist parallel with external wall

Finnjoist insulation details(concept guidance only - specific details by building designer)

External cavity wallby building designer.

Floor insulation omitted for clarity.

All ventilation and solumcover to appropriatebuilding regulations.

Ventilation to Building Regulation and designer’s requirements.

Wall insulation buildingdesigner’s requirements.

Solum.

Floor deck.Sealant.

150mm MIN.Air flow.

25mm minimum.

DPCFinnjoist.

150mm MIN Air clearancebetween floor and solum.

Note:Insulation to be fittedtight to the undersideof the timber decking.

Wall.

Decking.

Wire plastic mesh.

Fix strip of insulationbetween wall and lastjoist Min R-value of0.75m2k/w.

Note:Vapour control barriers may berequired for certain types of floorconstruction and insulation types.

Option for a solid rigid insulation wheresolid insulation is used ensure it is cutaccurately and that there are no gaps.Herringbone strutting not to be used.Fitted to battens for deep joist.

To support the insulation agalvanised wire plastic meshor approved breather boardappropriately stapled to the Finnjoist.

Insulation packed tightbetween webs ofFinnjoist. Thickness bybuilding designer.

Floor deck.

Finnjoist.

Finnjoist.

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WARNINGSIn order to maintain the performance and efficiency of your Finnjoist please ensure the following warnings are adhered to:

cut or notch flange.

make holes with hammerunless knock-out isprovided.

overcut hole and damage flange.

use over-sized nails.

cut flange for pipesor cables.

store in contact withground or have extendedexposure to sun and water.

DONOT

DONOT

DONOT

DONOT

DONOT

DONOT

put holes too close to supports.

DONOT

cut beyond inside edge of bearing.support I-Joist on web.DO

NOTDO

NOT

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ON-SITE SAFETY, JOISTS ARE UNSTABLE UNTIL BRACED LATERALLY.

STORAGE

HANDLING

Lack of concern for proper bracing during construction can result in serious accidents. Erection bracing and procedures,as well as the safety of the workers, are the responsibility of the erector. Under normal conditions if the followingguidelines are observed, accidents will be avoided. Please refer to page 28 for more detailed information.

1. All timber blocks, hangers and struts must be completely installed and properly nailed.2. Lateral restraint must be provided by a diagonally braced and blocked system, comprising a minimum of 3 adjacent

joists in each bay. In long bays install additional systems spaced not greater than 10 metres.

DONOT

DONOTDODO

Finnjoists should be left bandedtogether until ready to install.

Use bearers adequate tokeep Finnjoists above groundand out of mud and water(approximately 3.0m centres).

Workers should stay clear whencutting the banding to avoidpossible injury from flyingbanding of toppling joists.

DONOT

DONOT

DONOT

dump or drop Finnjoistsfrom lorry.

stack building materials onunbraced joists.

allow workers to walk on joists until bracedINJURY MAY RESULT See Notes 1 and 2.

protect from weather. store Finnjoists invertical orientation.

store flat.

lift in the flat orientation. lift Finnjoists by thetop flange.

For more information and a list of stockists in your area visit www.finnforest.co.uk or call 01205 883 835.

Wood is the only building material that is truly renewable,if well managed. Forest certification schemes give assurancethat the timber is legal and from sustainable sourcesFinnforest UK sources certified timber over uncertifiedand is an approved Chain of Custody supplier.

FF1814 June 2006.

The photographs in this brochure are for illustration purposes only.Finnforest reserves the right to change the range without notice.All information correct at time of going to print/press.

Finnforest recommend the following connectors foruse with the Finnframe floor system

building systems

Local Stockist

Cullen Building Products Limited1 Wheatstone PlaceSouthfield Industrial EstateGlenrothes FifeKY6 2SW

Tel: +44 (0) 1592 771132Fax: +44 (0) 1592 771182

www.cullen-bp.com

Simpson Strong-TieWinchester RoadCardinal PointTamworth StaffordshireB78 3HG

Tel: +44 (0) 1827 255 600Fax: +44 (0) 1827 266 616

www.strongtie.co.uk

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