AS 1684.2 N4 Supp 6-2006
Residential timber-framed construction - Non-cyclonic areas - N4 Supplement 6: Timber framing span tables - Wind classification N4 - Seasoned softwood - Stress Grade MGPÂ 15 (Supplement to ASÂ 1684.2-2006)
standard by Standards Australia, 01/01/2006