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

SpeciesAsh, Alpine – Eucalyptus delegatensisAsh, Mountain – Eucalyptus regnansAsh, Silvertop – Eucalyptus sieberiBeech Myrtle – Nothofagus cunninghamiiBlackbutt – Eucalyptus pilularisBlackbutt, New England – Eucalyptus andrewsiiBlackbutt, WA – Eucalyptus pantensBlackwood – Acacia melanoxylonBloodwood Red – Corymbia gummiferaBox, Brush – Lopehostman confertusBox, Grey – Eucalyptus microcarpaBox, Grey, Coast – Eucalyptus bosistoanaBrownbarrel – Eucalyptus fastigataGum, Blue, Sydney – Eucalyptus salignaGum, Blue, Southern (TAS) – Eucalyptus globulusGum, Blue, Southern (VIC) – Eucalyptus globulusGum, Manna – Eucalyptus viminalisGum, Red, River – Eucalyptus camaldulensisGum, Rose – Eucalyptus grandisGum, Shining – Eucalyptus nitensSpeciesGum, Spotted – Corymbia maculataGum, Sugar – Eucalyptus CladocalyxGum, Yellow – Eucalyptus leucoxylonIronbark, Grey – Eucalyptus drepanophyllaIronbark, Red – Eucalyptus sideroxylonJarrah – Eucalyptus marginataKarri – Eucalyptus diversicolorMahogany, Red – Eucalyptus resiniferaMarri – Eucalyptus calophyllaMerbau – Instia bijugaMessmate – Eucalyptus obliquePine, Baltic – Picea abiesPine, Radiata – Pinus RadiataPine, White Cypress – Callitris glaucophyllaSheoak, WA – Allocosuarina fraseranaStringybark, Yellow – Eucalyptus muelleranaTallowwood – Eucalyptus microcorysTurpentine – Syncarpa glomuliferaWattle, Silver – Acacia dealbataTABLE 16.4 : Suitable veneer species for plywood constructionThe timber species listed in Table 16.4 have been tested and achieve the following performance when tested inaccordance with AS/NZS 3837:1998 and using the Method of Kokkala, Thomas and Karisson to calculate Material groupnumber.Material Group Number 3Average Extinction areaLess than 250m 2 kgFloor MaterialsTests done by WFRA in accordance with AS ISO 9239.1-2003 resulted in the plywood constructions givenin Table 16.5.SpeciesThickness(mm)PerformanceCritical Radiant Heat FluxPine, Hoop – Araucaria cunninghamiiPine, Radiata – Pinus RadiataPine, Slash – Pinus elliotti(plywoods with no substrate)15 or >17 or >17 or >Between 2.2 (kW/m 2 ) and4.5 (kW/m2 )Less than 750(%-min)Early Fire Indices – To AS 1530.3TABLE 16.5 : Plywood FlooringTable 16.6 gives the relevant data regarding early fire hazard tests for both untreated and fire retardanttreated plywood which is no longer acceptable. If fire retardant plywood is desired treatment must beby impregnation with fire retardant salts and must be certified to show compliance with the buildingregulations.245