A-1 SPAN TABLES FOR JOISTS AND RAFTERS 1 EXPLANATION OF TABLES 1. SCOPE 4. MOISTURE CONTENT These span tables for joists and rafters are calcu- lated on the basis of a series of modulus of elasticity (E) and bending design values (Fb). Additionally, compres- sion perpendicular to grain...
Structure. Tables are included for domestic floor joists, ceiling joists and binders, and rafters and purlins supporting rafters for traditional pitched roofs. Calculations are also given for "canted" purlins supporting roof sheeting or cladding, and for flat roof joists. The tables cover softwood ...
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 are given below....