EWPAA Structural Plywood and LVL Design Manual - Engineered ...

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Results of recent tests organised by the Timber Development Association and done by CSIRO to AS 1530.3has found four timber species, i.e. White Mahogany, Grey Ironbark, Mountain Grey Gum and Merbau(Kwila) to have a spread of flame index of zero. These are the first timber species to have a zero spreadof flame index.Included in this testing program were four plywood species not listed in Table 16.6. These were Blackbutt,Rose Gum, Spotted Gum, and Hoop Pine. To view the test results derived for the (27) timber species,including the plywoods go to www.timber.net.au.16.4 LVL PerformanceWFRA Short Form Report (SFR4 1117.2) dated September 26, 2007 confirm timber species tested bythem have attained the stated performance. The tests were done to satisfy the requirements of theBuilding Code of Australia specification C1.10a.Wall and Ceiling LiningsFor solid timber (including LVL) the assessed construction was a solid timber wall and ceiling liningsmade from the timber species listed in Table 16.4 and:• being not less than 12mm thick;• having a tongue and groove or square edge profile;• a smooth milled surface finishThe material group number is (3) and the average extinction area is less than 250m 2 /kg the same as forplywood of not less than 6mm thickness.Floor MaterialsSolid timber floors (with no substrate) were assessed for solid flooring made from the species listed inTable 16.7. The flooring material must:• be not less than 12mm thick;• be fixed to structural framing with an air gap under;• incorporate a tongue and groove or square profile;• have a smooth milled surface finishSpeciesAsh, Alpine – Eucalyptus delegatensisAsh, Mountain – Eucalyptus regnansGum, Blue, Sydney – Eucalyptus salignaGum, Rose – Eucalyptus grandisSpeciesGum, Shining – Eucalyptus nitensPine, Celery-top – Phyllocladus asplenifoliusStringybark, Yellow – Eucalyptus muelleranaTABLE 16.7 : LVLspecies suitable for 12mm thick flooring (no substrate)Solid timber floors (no substrate) were assessed for flooring made from the species listed in Table16.8. The flooring material must:• be not less than 19mm thick;• be fixed to structural framing with an air gap under;• incorporate a tongue and groove or square edge profile;• have a smooth milled surface finish247
SpeciesAsh, Alpine – Eucalyptus delegatensisAsh, Mountain – Eucalyptus regnansAsh, Silvertop – Eucalyptus sieberiBlackbutt – Eucalyptus pilularisBrownbarrel – Eucalyptus fastigataGum, Blue, Sydney – Eucalyptus salignaGum, Manna – Eucalyptus viminalisSpeciesGum, Rose – Eucalyptus grandisGum, Shining – Eucalyptus nitensMessmate – Eucalyptus obliquePine, Celery-top – Phyllocladus asplenifoliusPine, Radiata – Pinus RadiataStringybark, Yellow – Eucalyptus muelleranaTABLE 16.8(a)SpeciesBeech Myrtle – Nothofagus cunninghamiiBlackbutt, New England – Eucalyptus andrewsiiBlackwood – Acacia melanoxylonBloodwood Red – Corymbia gummiferaBox, Brush – Lopehostman confertusBox, Grey – Eucalyptus microcarpaGum, Blue, Southern (TAS) – Eucalyptus globulusGum, Blue, Southern (VIC) – Eucalyptus globulusGum, Red, River – Eucalyptus camaldulensisGum, Spotted – Corymbia maculataGum, Sugar – Eucalyptus CladocalyxGum, Yellow – Eucalyptus leucoxylonSpeciesIronbark, Grey – Eucalyptus drepanophyllaIronbark, Red – Eucalyptus sideroxylonJarrah – Eucalyptus marginataKarri – Eucalyptus diversicolorMahogany, Red – Eucalyptus resiniferaMerbau – Instia bijugaPine, Baltic – Picea abiesPine, White Cypress – Callitris glaucophyllaTallowwood – Eucalyptus microcorysTurpentine – Syncarpa glomuliferaWattle, Silver – Acacia dealbataTABLE 16.8(b) LVL species suitable for 19mm thick flooring (no substrate)Solid timber floors (with substrate) were assessed from flooring made from the species listed in Table16.8(a) and (b). The flooring material must:• be not less than 12mm thick;• be fixed to a substrate listed in Table 16.9 with PVA adhesive;• incorporate a tongue and groove or square edge profile;• have a smooth milled surface finishParticleboard 716kg/mSubstrate SpecificationFibre cementNormal weight concrete floorLightweight concrete floor3Thickness (mm)not less than 19Not less than 15mmNot less than 75mmNot less than 75mmCritical Radiant Heat Flux for LVLTABLE 16.9 : Substrates for LVL flooringThe timber species listed in Table 16.10 achieve the stated performance when tested in accordance withAS ISO 9239.1-2003.248
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Structural Plywood & LVL Design Man
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Table of Contents1 Plywood & LVL -
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11 Plywood Stressed Skin Panels ...
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Table of FiguresFIGURE 4.1: Plywood
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Part OneProduct Production & Proper
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PeelingAfter conditioning, the logs
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Sanding, Trimming and BrandingAfter
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through to applications where aesth
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2.7 Identification CodeThe plywood
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2.10 Non Structural PlywoodsInterio
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3.5 Veneer QualityVeneer quality us
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the hygroscopic movement of structu
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effective an insulator as the wood
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5 Structural Plywood - Design Princ
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12 - 13 40015 - 19 45020 - 25 52026
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TABLE 5.3: Standard Structural Plyw
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TABLE 5.5: Indicative Stiffness Val
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Strength Limit StateStrength LimitS
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Application of Structural memberAll
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FIGURE 5.5 shows an I-beam defining
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j 2- Duration of Load Factor for Cr
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Using the theory of parallel axes a
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6 Structural LVL - Design Principle
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I (neutral axis(NA)-stiffness= (bd
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Serviceability Limit State:Calculat
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Strength Limit State:Strength Limit
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Equilibrium Moisture Content (EMC)P
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(c) For shear k 11 = 1.0(d) For com
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Chapter 6 AppendixSlenderness Co-Ef
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FIGURE A6.3: Continuous restraint a
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Stability factor.The stability fact
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7.4 Structural Plywood Flooring - D
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5. Critical Load Action EffectsLoad
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5. Serviceability limit state - Des
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7.10 Structural Plywood Residential
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Because of the obvious difficulty a
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1.2 m roof load width)0.25 kPa x 1.
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Concentrated Imposed Load (Q)M max
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5. Serviceability Limit Stateand [A
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8 Structural Plywood Webbed Box Bea
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AdhesivesBeams relying only on an a
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5. Check Beam Stiffness:Check beam
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1. Initial beam trial size:(a)(b)Fr
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Required nail spacing s = øN j / q
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Figure 8.5 shows a discontinuous pl
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A8Chapter 8 AppendixBending / Compr
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where:A= h3.5 3D .1032 N. mJ12.440.
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FIGURE A8.2: Guide for Selecting In
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Table A8.6: Unit-Load Deflection Sp
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9 Structural Plywood Diaphragms & S
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FIGURE 9.3 shows a plywood panel na
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The following are the design steps
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Wind force, w on diaphragm w = 1.86
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Converted to Limit States CapacityC
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4. Chord Size and SplicesThe chords
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Load/Nail (N)Nail Deformation (mm)2
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• The horizontal force is 1.9 x 2
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= 5 kN/m v oR = 15/5 = 3 kN/m107
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ELEVATIONFIGURE 9.12: Shows shear f
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As previously mentioned the shearwa
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Assuming the applied racking load t
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In this instance let the two panels
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A9 CHAPTER 9 APPENDIXPlate 1Plate 2
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Plate 7Plate 8Plate 9119
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REFERENCES CITED:1. Timber Shearwal
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“nailability” by increasing res
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(a) (b) (c)FIGURE 10.3: Actual and
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Re-arranging the torsion equation r
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The polar moment of area (I p ) of
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Design Example - Plywood Gusseted P
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• assuming width of lines paralle
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hence:where:ΦMj⎡ Ip⎤= (0.8 x1.
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A10 Chapter 10 AppendixPhotographs
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MOMENT JOINTSPlate 7Plate 8Plate 9(
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REFERENCES CITED:1. Investigation o
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11.2 MaterialsPlywoodPlywood used i
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FIGURE 11.3: Effective widths of pl
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Transformed SectionSince the plywoo
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FIGURE 11.5: Bending stresses in st
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FIGURE 11.6: Stressed skin panel tr
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Flexural Deflection Long Term Servi
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Compression SpliceUsing 17mm F11 st
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REFERENCES CITED:1. Design & Fabric
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12 Exotic Structural Forms12.1 Intr
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displacement between diaphragms eac
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The section modulus (Z) is:ZZ=Iy1=1
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FIGURE 12.9: A parabolic arch (not
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F AFFFASS= (374.4 + 166.4)kN= 540.8
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12.11 Hypar Design - GeometryTo dev
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FIGURE 12.16: Reactive force compon
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12.14 Methodology - Principal Membr
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Many braced dome geometries exist b
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θasphere= is the angle subtended b
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AndNNNxyxyP=L21P=L12P=L33L2P3⎤+
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• whether or not to force the ply
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A12Chapter 12 AppendixEXAMPLES OF E
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EXOTIC STRUCTURAL FORMS DESIGN AIDS
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Type 1 joints referred to in AS 172
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FIGURE 13.3: Two and Three member T
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SECTION 4 : AS 1720.1-1997 : Clause
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connection load carrying capacity c
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13.5 Design of Type 1 Nailed Connec
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Page 208 and 209: nnaa=nnr42=5= 9 rowsThe assumed val
Page 210 and 211: 13.11 Design of Type 2 Screwed Conn
Page 212 and 213: The reasons k 13 and k 14 are not c
Page 214 and 215: Type of JointSeasoned TimberUnseaso
Page 216 and 217: 13.16 Design of Type 2 Bolted Conne
Page 218 and 219: where:Δ = Δi +h33j14xh35Q *Qkpfor
Page 220 and 221: The exploded view in Figure 13.11 s
Page 222 and 223: FIGURE 13.12: Edge, end and bolt sp
Page 224 and 225: 13.21 Design of Type 2 Coach Screwe
Page 226 and 227: REFERENCES CITED:1. AS 1720.1-1997,
Page 228 and 229: Plate 3Plate 4219
Page 230 and 231: Plate 7Plate 8221
Page 232 and 233: 14 Noise Control14.1 IntroductionTh
Page 234 and 235: The absorption process of a single
Page 236 and 237: When it is required to add more tha
Page 238 and 239: FIGURE 14.5: Types of cavity wallsT
Page 240 and 241: 15 Condensation & Thermal Transmiss
Page 242 and 243: 15.4 Thermal TransmissionThermal tr
Page 244 and 245: 15.5 Thermal Transmission - Design
Page 246 and 247: REFERENCES CITED:1. Condensation, C
Page 248 and 249: The early fire hazard test indices
Page 250 and 251: ISO 9705 AND AS/NZS 3837These tests
Page 252 and 253: General InformationDesign of struct
Page 254 and 255: SpeciesAsh, Alpine - Eucalyptus del
Page 258 and 259: FlooringConstructionLVL(Substrates
Page 260 and 261: as expressed in the BCA.Species Ave
Page 262 and 263: ClosurePlywood Thickness for:Dougla
Page 264 and 265: Borers are rarely a problem with st
Page 266 and 267: HazardClassH1Exposure Specific serv
Page 268 and 269: 17.3 Durability and Finishing Appli
Page 270: EWPAA MembersPlywood and Laminated
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