Masonite Beams Technical Guide for Floor Applications

Transcription

1 Masonite Beams Technical Guide for Floor Applications

2 About Masonite Beams Masonite Beams AB has been a pioneer of European based I-Joist manufacturing since 97 and operates from its original location in Rundvik, Sweden. In 006 the company was bought by the Byggma Group, a Norwegian building products manufacturing group as part of a strategic move to strengthen its structural products portfolio. The group is comprised of 6 brands. Its commitment to manufacturing was further underlined in 008. After years of research and development and an investment programme of 8m, the company opened a new state-of-the-art I-Joist manufacturing plant with a production capacity of million linear metres per year. Lifetime Guaranteed Quality and Performance Masonite Beams products are manufactured to precise tolerances in order to meet their published performance characteristics. These products are warranted to be free of defects in materials and workmanship, and to meet the expected design performance, if installed and used in accordance with the information provided in the Installation Guide, for the lifetime of the structure. Should you experience a problem which you believe may have been caused by these products then please contact our representatives who will help to resolve the issue. 0 MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS

3 Environmental Credentials In today s construction industry, the issue of sustainability and minimising the impact on the environment are becoming increasingly important. Masonite operates a comprehensive environmental policy, which covers both the manufacture of its products and the sourcing of the raw materials used. Manufactured in accordance with the environmental management system ISO 00, Masonite I-Joists utilise wood fibre certified under PEFC with full chain of custody processes. The high efficiency of the wood to I-Joist conversion process means that for a specific volume of Masonite I-Joists, far fewer trees are harvested than those required to produce an equivalent volume of solid sawn timber joists. MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS 0

4 Masonite I-Joists I-Joists are used as structural components in engineered timber floor, wall and roof systems. The majority of Masonite I-Joists are used as part of the Masonite Floor System. The manufacturing facility in Sweden is supported by Södra in the UK with a first class, dedicated, experienced team handling sales, engineering and design, together with a comprehensive software package covering layout, engineering and cut optimisation. Masonite I-Joists are a lightweight alternative to conventional timber members, offering time-saving and cost-saving solutions for floor, roof and wall construction to a wide range of private and public sector applications. Unlike traditional timber, which can warp, twist and shrink, Masonite I-Joists have a superior dimensional stability resulting in fewer costly site call-backs. Masonite engineered timber I-Joists are comprised of slow-grown, high grade white wood flanges combined with OSB for the web. Masonite I-Joists carry the ETA certification and CE marking, together with PEFC chain of custody certification. Masonite I-Joists are manufactured in accordance with the requirements of ISO 900 and the environmental standard ISO 00. Masonite I-Joists are manufactured to a wide range of lengths to meet all structural requirements and are available in the following depths: 0mm, 0mm, 00mm, 50mm and 00mm. NOTE: The HL Joist is identified by a RED dotted line on the flange. 7mm HL H HM HI HB 7mm 7mm 60mm 70mm 97mm STANDARD DEPTHS mm HL H HM HI HB PRODUCT APPROVALS 0 MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS

5 Masonite I-Joists DOMESTIC FLOORS LOADSHARING ( OR MORE JOISTS NO MORE THAN 60mm ON CENTRE) SERVICE CLASS PERMISSIBLE RESISTANCES ) DOMESTIC FLOORS LOADSHARING ) JOIST SERIES DEPTH H mm JOIST WEIGHT kg/m FLEXURAL RIGIDITY EI N.mm x0 9 SHEAR RIGIDITY GA Nx0 6 BENDING MOMENT ) kn.m Vertical Shear kn 5mm END BEARING kn NO WEB STIFFENERS 89mm INTERMEDIATE BEARING kn NO WEB STIFFENERS HL HL HL H H H H H HM HM HM HM HM HI HI HI HI HI HB HB HB HB HB NOTES: ) Permissible resistances are for Long Term duration (K =.00) and can be increased for duration of load using the appropriate K factor as defined in BS ) Permissible resistances have already been multiplied by domestic floor adjustment factor K dom =. and loadsharing factor K 8 =.0. ) Permissible moments assume full lateral support of the compression flange. Full support is considered to be a maximum unbraced length of 50mm for HL or H series, 500mm for HM, 600mm for HI and 000mm for HM series. MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS 05

6 I-Joist Span Chart DEPTH mm SERIES 00mm ccs 80mm ccs 600mm ccs 0 HL H HM HI HB HL H HM HI HB HL H HM HI HB HM HB HM HB NOTES:. The maximum spans shown above are in metres and indicate the most restrictive single or multiple effective span applications.. The deflection restriction has been taken as the lesser of 0.00 x Effective span or mm in accordance with BS The above table assumes load sharing i.e. joist are no more than 60mm centres.. Maximum spans assume that the joist flanges are adequately restrained laterally and that decking and ceiling are fixed to the joist in accordance with relevant British Standards. 5. Spans are calculated for the uniformly distributed loads indicated only. This figure allows for the dead load of a floor with a mm chipboard deck and 5mm plasterboard ceiling, an imposed loading of.5kn/m (from BS 699-, for domestic floors) and a uniform allowance for lightweight partitions not exceeding 0.8kN/m run. For other conditions, contact your Södra Wood representative. 6. Minimum 89mm end bearing is assumed. 06 MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS

7 Glulam Beams Glulam Beams are manufactured from 0mm laminations of Nordic Spruce to GLH standard under EN080. Available in m lengths, Glulam Beams are the perfect complement to I-Joists as part of the Masonite Floor System. DEPTH 8mm 5mm 90mm 0mm DEPTH mm 8mm 5mm 90mm 0mm MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS 07

8 Glulam Beam Material Properties BREADTH mm DEPTH mm AREA mm X 0 SECTION MODULUS mm X 0 6 MOMENT OF INERTIA mm X 0 9 MR knm MAX SHEAR kn EL Nmm X 0 9 WEIGHT kg/m Notes:. Properties of horizontally laminated beams are calculated in accordance with BS568-, assuming 0mm laminates. Grade stresses are modified for number of laminates and beam depth but not load duration.. Design properties are for long term loading without load sharing.. Values apply only if lateral support of the compression edge is provided at not more than 600mm centres.. These values apply only to dry use conditions - i.e. SC and SC. 08 MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS

9 Intermediate Floors TIMBER FRAME PARTY WALL JUNCTION Notes: Floor specifications to provide airborne sound reduction Rw 0dB (with deck adhesive system) and fire resistance 0 minutes (EN65 Part/) These details meet the requirements of Robust Details E-WT- and E-WT-, for timber separating walls. Plywood/OSB web filler blocks cut to fit between flanges, thickness to suit flange size, fitted both sides 8mm glulam 5mm glulam to carry plasterboard MASONRY PARTY WALL JUNCTION Floor specifications to provide airborne sound reduction Rw 0dB (with deck adhesive system and fire resistance 0 minutes (EN65 Part/) Effectively seal the joist end with web stiffeners and sealant or a proprietary cap Continuous horizontal ribbon of adhesive Render Masonry Hanger Notes: Junction details meet the requirements of Robust Details E-WM- to 8 inclusive, for masonry separating walls. Illustration: concrete blocks, render and gypsum-based boards on dabs (E-WM-,, 6 & 7). Only use with masonry wall specifications in Part E Robust Details. STANDARD INTERMEDIATE FLOOR Floor specifications to provide airborne sound reduction Rw 0dB (with deck adhesive system) and fire resistance 0 minutes (EN65 Part/) Optional fitment of insulation Fix ceiling lining in accordance with the plasterboard manufacturer s instructions Optional fitment of recessed light fittings. (These must have been assessed for 60 minutes fire resistance) 5 Notes: Perimeter noggins may not be required for 5mm plasterboard ceilings, refer to manufacturer Insulation (density 0 Kg/ m ) may be required for sound insulation where alternative deck and ceiling constructions are used. Insulation may be added to improve sound resistance. 5 mm flooring-grade chipboard 5mm standard wallboard MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS 09

10 Separating Floors TIMBER FRAME EXTERNAL WALL JUNCTION Masonry outer leaf 9 Resilient batten Cavity stop Min. 50mm external wall cavity layers of gypsum-based board, nominal weight of 8 kg/m per layer Seal with tape or caulk with sealant Min. 5mm foamed polyethylene resilient flanking strip Min. 8mm T&G flooring board 0 5 Mineral wool laid between battens 5mm OSB subdeck Min. 0mm Masonite I-Joist Min. 00mm mineral fibre cased quilt (0- kg/m ) Resilient bar layers of gypsum-based board, combined weight of kg/m, all joints staggered Gypsum based board (.5kg/m ) TIMBER SEPARATING WALL JUNCTION This is NOT a Robust Detail and therefore will be subject to Pre-Completion Testing (PCT) in England and Wales. mm Chipboard flooring Gypsum based board (.5kg/m ) 0 layers of gypsum-based board, total nominal weight of kg/m both sides Part E Robust Details E-FT- (timber I-Joists) and E-WT (twin timber frames without sheathing board). Refer to Robust Details Part E handbook for detailed specifications mm thick mineral fibre (0 kg/m ) mm Chipboard flooring Min. 0mm Masonite I-Joist Min. 00mm mineral fibre cased quilt (0- kg/m ) Resilient bar Requirements for intermediate floors, rim board, perimeter joists and blocking apply Min. 8mm T&G flooring board Gypsum based board (.5kg/m ) Resilient batten Mineral wool laid between battens 5mm OSB subdeck Min. 0mm Masonite I-Joist Min. 00mm mineral fibre cased quilt (0- kg/m ) Plywood/OSB web filler blocks cut to fit between flanges, thickness to suit flange size, fitted both sides 8 layers of gypsum-based board, combined weight of kg/m, all joints staggered 0 MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS

11 Other Floor Information FIRE RESISTANCE Full 0 minutes DECKING JOIST CENTRES INSULATION PLASTERBOARD TYPES mm Chipboard 00, 80 and 600mm Optional max density 5kg/m 5mm standard wallboard of Gyproc or equivalent Full 60 minutes DECKING JOIST CENTRES INSULATION PLASTERBOARD TYPES mm Chipboard 00, 80 and 600mm Optional max density 5kg/m 5mm fire resistant board with.5mm standard wallboard over of Gyproc or equivalent The char rate of glulam beams is as per table. of EN (Eurocode 5.Part.) at 0./min MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS

12 Safety Bracing Details UNBRACED JOISTS ARE UNSTABLE! Do not walk on or apply any materials to the joist area until the floor system is properly braced. The bracing should be removed in sequence as the decking is installed. The following represents a generic method of bracing a floor. Each system will be slightly different and the installer must ensure that all sections of the floor are accounted for..m max..m max. Minimum 675mm cured masonry * is required above certain masonry hangers ** before load may be applied. Refer to hanger manufacturer s technical literature. * or joists may be propped ** safety restraint type hangers do not x 97mm softwood bracing members nailed with no..5 x nails at each joist. 8 x 5mm timber stability blocks to be fixed between at least joists, covering at least.m in length. Nail with at least no..5 x nails each end. Notes: Full depth I-joist blocking panels may be used instead of solid timber stability blocks. All blocks to be cut accurately and squarely to maintain spacing of joists. Additional blocks and bracings are required for any areas of joists running in opposite directions and for cantilevered joists (unless permanent closure piece is installed at this stage). Install further sets of blocks and diagonals at a maximum of m centres in long runs of joists. MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS

13 ABC Construction Details A MASONRY WALL RESTRAINT PERPENDICULAR TO JOIST A MASONRY WALL RESTRAINT PARALLEL TO JOIST Thin metal restraint strap installed in accordance with the manufacturer s instructions Min. 8 x 97mm nogging fixed to joists by skew nails Restraint strap fitted to joist on non-restraint type masonry hanger Parallel restraint straps may only be omitted if the joist has at least 90mm of direct bearing on the wall, provided that the height of the wall does not exceed storeys Restraint strap on built-in joist A PARALLEL PARTITION NOGGINGS A PERIMETER NOGGINGS Non-load bearing stud partition fixed to noggings (max. selfweight of partition 0.8kN/m run) 8 x 75mm partition noggings supported by metal z-clips, nailed in accordance with the manufacturer s instructions Noggings may be skew nailed to joists or supported on z-clips Timber noggings fitted between joists to support free edges of decking at external or internal walls. Also applicable to masonry walls i Noggings may also be attached with no..5 x nails skew nailed at each end B I-JOIST BLOCKING PANEL B RIM I-JOIST Masonite I-Joist blocking panel Masonite I-Joist rim board Joist has full bearing on timber plate Joist requires 5mm minimum bearing B RIM BOARD B MASONRY HANGER 8mm Glulam or similar approved Joist requires 5mm minimum bearing Perimeter nogging for decking support where required Proprietary approved masonry joist hangers - web stiffeners may be required, see notes on page 6 i Parallel restraint straps will be required with non-restraining hangers see A MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS

14 ABC construction details B5 MASONRY WALL BEARING B6 PARALLEL TIMBER FRAME WALL Joist end built into wall. Note some capping devices may require less than a full bearing to prevent fouling the cavity Masonite I-Joist with half bearing into wall Rim board to suit wall load Perimeter noggings i The joist bearing must be sealed to prevent air leakage. This may be achieved by the use of proprietary capping devices or end blocks fitted to the joist webs with sealant around the joist ends B7 INTERMEDIATE BEARING LOAD BEARING WALL ABOVE B8 INTERMEDIATE BEARING COMPRESSION BLOCKS Load bearing wall directly above wall below Masonite I-Joist blocking panels between joists Load bearing wall directly above wall below Height of compression blocks = joist depth + mm 8 x 89mm minimum softwood compression blocks B9 INTERMEDIATE BEARING NO LOAD BEARING WALL ABOVE B0 INTERMEDIATE BEARING MASONRY WALL Web stiffeners where required Perimeter nogging Minimum 89mm bearing B INTERMEDIATE BEARING DOUBLE BLOCKING B COLUMN WITH COMPRESSION BLOCKS Load bearing wall directly above wall below Webs of blocking in line with edge of stud wall above and below i Softwood compression blocks, min. 8 x 89mm, height = joist depth + mm I-Joist blocking panels Number of blocks to suit width of column above MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS

15 ABC construction details B CANTILEVER SUPPORTING WALL B REINFORCED CANTILEVER SUPPORTING WALL i I-Joist Blocking 8mm Glulam Structural cantilever must not exceed 600mm I-Joist Blocking 9mm ply reinforcement one or both sides of cantilevered joists, (determined by loading) 600mm max. nailed at 50mm centres with.5mm dia. nails, long. Stagger nails when fixing ply both sides 600mm max. i Structural cantilever must not exceed 600mm B5 NON LOAD BEARING CANTILEVER B6 WALLPLATE CONNECTION I-Joist Blocking 8mm Glulam i Max. cantilever / SPAN length is 00mm. No load applied on cantilever SPAN Top mount hangers Timber bearing plate securely fixed to flange of steel beam/ masonry wall (design of fixings by Building Designer) C C I-JOIST TO SOLID BEAM CONNECTION Top mount hanger Face mount hanger Glulam beam Face mount hangers which do not laterally support the joist top flange require web stiffeners I-JOIST TO I-JOIST CONNECTION BACKERLESS Filler block or proprietary metal clips must still be installed with multiple joists Approved hanger designed for usewithout backer blocks C 5 6 i I-JOIST TO I-JOIST CONNECTION 6 Top mount hanger Filler block or proprietary metal clips must be installed with multiple joists 5 Backer block on hanger face only for double joist Backer block both sides of single joist Face mount hanger Double I-Joist Backer blocks nailed with 0no..75mm diameter nails x 75mm long, with ends clinched if possible. For top mount hangers, backer block tight to top flange of joist. For face mount hangers, backer block tight to bottom flange. Filler blocks fitted tight to top flange. Use 0no..00mm nails x 90mm long, for HB joists. See table on page 6 for size of backer. Note that approved hangers which eliminate the need for backer blocks are available. See detail C. MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS 5

16 Joist Accessories FILLER AND BACKER BLOCK SIZES The length of backer and filler blocks should allow fitment of nails without splitting and are typically mm long. DEPTH mm SERIES HL/ H HM HI HB HL/ H HM HI HB HL/ H HM HI HB HM HB HM HB Block Height Backer Thickness Filler Thickness WEB STIFFENER SIZES DEPTH mm SERIES HL/ H HM HI HB HL/ H HM HI HB HL/ H HM HI HB HM HB HM HB Height Thickness Nails no no no no 90mm no no no no 90mm no no no no 90mm no no 90mm no no 90mm WEB STIFFENERS ARE REQUIRED IN THE FOLLOWING CASES: When a higher reaction value is needed at an internal support, refer to Engineering Support for more information. If the sides of the hanger do not laterally support the I-Joist top flange. When a concentrated load is transferred from above, the web stiffeners should be tight to the top flange (gap at bottom flange). 6 MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS

17 Connections MULTIPLE PLY GLULAM MEMBERS - FIXING DETAILS Allowable uniform load applied to multiple glulam beam kn/m PLY THICKNESS PLY MEMBERS PLY MEMBERS PLY MEMBERS FIXINGS rows.00mm x 75mm long nails at 00mm centres rows.00mm x 75mm long nails at 00mm centres rows M bolts at 600mm centres rows M bolts at 00mm centres 8mm 5mm 90mm 8mm 5mm 8mm 5mm Notes:. Verify adequacy of beam to support applied loads.. Beams wider than 80mm require special consideration.. For and member assemblies nails should be driven from both sides into the centre piece.. Nails to be fixed 50mm from the edges & ends of the beam. 5. Bolts to be installed 75mm from the edge and 50mm from the ends of the beam. 6. All bolts to be fitted with steel washers, minimum 6mm diameter x mm thick. 7. All loads are assumed to be applied perpendicular to the grain on one face only. 8. Values apply to beams in service classes and only. Table showing the maximum uniform load which can be applied to one face of composite glulam beams. MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS 7

18 Allowable Holes MASONITE BEAMS Unless otherwise stated: All holes must be placed on the centre of the web. No holes are allowed in the safety zones. Holes must not extend into the flange material. Holes with diameter less than 0 mm can be placed anywhere in the web, but with a minimum distance of 0mm between holes. One hole with diameter less than 0 mm can be placed anywhere in web, except in the safety zones, if the general rules for hole spacing are followed. The maximum dimensions for rectangular holes are: a = 00 mm and b = 00 mm. Placement restrictions and the maximum sizes of holes are shown in the diagram and table below. 50mm 0 0mm 0 0mm 0 0mm Safety zone 0 0mm h h > h D D > h 50mm Safety zone 50mm 0 0mm b h > h a Larger of h or x a D Groups of holes are allowed provided that existing holes regulations are followed for a large hole enclosing them PRODUCT DEPTH mm Maximum Hole Depth mm Minimum Distance from Bearing or Point Load h h h h h Minimum Distance Between Circular Holes <0mm x larger of (D or D ) x larger of (D or D ) x larger of (D or D ) x larger of (D or D ) x larger of (D or D ) >0mm h h h h h Minimum Distance Between rectangular and other holes Larger of h or x a Larger of h or x a Larger of h or x a Larger of h or x a Larger of h or x a Notes: All values above are valid for uniformly distributed loads. Information regarding the calculation of the reduction of shear capacity caused by a hole can be found in Masonite Beams European Technical approval; ETA /008. Any holes falling outside of these rules must be checked by our engineering support service. 8 MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS

19 Allowable Holes and Product Handling GLULAM BEAMS Based on BS568 Notes: Holes must be placed along the neutral axis and spaced apart at least x largest diameter hole. For holes outside these rules please contact engineering support THESE CONDITIONS ARE NOT PERMITTED UNDER ANY CIRCUMSTANCES If in doubt, please ask for advice before you cut. NO holes close to joist ends Use hole chart for max. size & min. distance to wall. NO notches in flanges of Masonite joists NO bevel cuts beyond the inside face of wall NO notches or holes in Glulam Except as advised in hole chart for the product. Storage Always store joist packs flat, properly covered and above the ground. Never store joist packs vertically. Handling Never lift or move the joist packs by the flanges. Always follow the HSE guidance on manual handling. Contractors should be aware of their health and safety responsibilities under the Construction (Design and Management) Regulations 05. MASONITE BEAMS TECHNICAL GUIDE FLOOR APPLICATIONS 9

20 BS568 Version Cirencester Office Park, Unit 8/9, Tetbury Road, Cirencester, GL7 6JJ, UK Tel: + (0) Fax: + (0)