Span Tables - Calculate Joist, Rafter and Wood Beam Spans
Use the span tables in the links below to determine the maximum allowable lengths of joists and rafters. These tables provide maximum spans for the #2 grades of four common species of lumber (Southern …
115% load duration for snow loads. 125% load duration for construction loads.
Span Tables - SFPA - Southern Pine
They help you determine how far a wooden beam or joist can span between support points, such as walls or beams, without compromising safety and structural integrity.
Span Table Calculators for Joists and Rafters - Engineers Edge
Joist and rafter span tables show the maximum distance these framing members can safely cover. The spans listed are based on the specific properties of the wood being used.
The range of values in the tables provides allowable spans for all species and grades of nominal 2-inch framing lumber customarily used in construction. These span tables assume installation of at least …
Max Span Calculator - Pacific Lumber Inspection Bureau
Enter lumber size, type of use, and span requirements in the Design Criteria section. Calculator generates the maximum span distance as well as the bending strength (F b), shear strength (F v) …
Span Calculator for Wood Joists and Rafters - RedX Apps
This tool is designed to provide accurate maximum span calculations for a wide range of commercially available softwood and hardwood lumber, including prominent species such as Douglas Fir, …
Check sources for availability of lumber in lengths greater than 20 ft.
Western Lumber Spans Design - WWPA
Design values and span tables for Western Lumber along with supporting publications.
Understanding Loads and Using Span Tables - American Wood Council
A complete analysis of wood’s mechanical properties is complex, but understanding a few basics of lumber strength will allow you to size joists and rafters with the use of span tables.