2. LUMBER DESIGN VALUES Use of these span tables requires reference to the applicable design values for the various species and grades of lumber. Tables W-1 and W-2 of Design Values for Joists and Rafters, a supplement to these span tables, provide such values for the most commonly used ...
original source: http://www.southernpine.com/span-tables/joists-rafters/ - Complete set of46 tables for live loads 30 to 100 psf and dead loads 10 to 20 psf and deflection limit 360 (joists) or 180 - 240 (ceilings and rafters for various snow loads), popular examples of these tables ...
Structural use of timber. Recommendations for the calculation basis for span tables. Purlins supporting raftersdoi:BS 5268-7.6:1990传统斜屋顶结构中使用的实木檩条的允许净跨度的计算基础,即不包括桁架椽屋顶.交叉引用:BS 648BS 4471BS 4978BS 5268:第2BS 5268部分:第3BS 5268部分:第7.1BS 6100节:第2.1BS...