1.Cape Rafter Sizing [Archive] - JLC-Online Forums
It is done to reduce the rafter span and allow a smaller size rafter. The rule of thumb for a purlin is to size the board to a 2x8 or 2x 10 and brace with a ...
2.Maximum Span Calculator for Joists & Rafters
Floor Joists, Ceiling Joists, Rafters (Snow Load), Rafters (Roof Live-Load) ... The Span Calculator for Wood Joists and Rafters (Span Calc) is available for ...