LOADS IN STRUCTURES 81 



WEIGHT OF AUSTRALIAN WOODS, DRY (Continued) 



Name of Tree 



Average 



Weight per 



Cubic Foot 



Pounds 



Eucalyptus tereticarnis (flooded gum) 68 



Eucalyptus viminalis (manna gum tree, drooping 



gum, or white gum tree) 43 



Eugenia smithii (myrtle) 57 



Exocarpus cupressiformis (native cherry tree) . . 60 

 Fagus cunninghamii (evergreen beech or native 



myrtle) 45 



Hakea leucoptera (water tree) 51 



Heterodendron oleifolium 53 



Lomatia f raseri 42 



Melalenca decussata 59 



Melalenca parviflora 62 



Myporum insulare 51 



Myrsine variabilis 45 



Panax murrayi (palm panax) 22 



Pimelea microcephala 55 



Pittosporum bicolor (white wood) 48 



Pomaderris apetala (hazel) 48 



Prostanthera lasianthas (mint tree) 51 



Santalum acuminatum (native peach or quan- 



dong) 52 



Santalum persicarium (native sandalwood) 47 



Senecio bedfordii (native dogwood) 56 



Syncarpia laurifolia (turpentine) 63 



Tristania conferta (brush or white box) 67 



Tristania neriifolia (water gum) 63 



Viminaria denudata 39 



SNOW AND WIND LOADS 



In calculating the weights on roofs, the snow load must be 

 included. When the rise of the roof is under 12 in. per ft. 

 of horizontal distance, the snow load is estimated at 12 Ib. 

 per sq. ft.; for roofs of a rise of more than 12 in. per ft. of 

 horizontal distance, assume the snow load to be 8 Ib. per sq. ft. 

 In northern climates, such as that of Canada, snow loads 

 50% greater than the preceding should be assumed. 



The wind pressure depends on the velocity with which 

 the air is moving. United States government tests have 



