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 Pine, Douglas Fir, Hem-fir, and Spruce-pine-fir (SPF).
Rafter Span Tables - myCarpentry
Rafter Span Tables - Use these tables to determine lengths, sizes, and spacing of rafters based on several factors such as species, load, grade, and spacing. Visit the roof framing page for more information on cutting roof rafters, and visit the roof pitch calculator for determining rafter lengths based on rise and run.
further information on span measurements including a chart which converts horizontal distances to sloping distances, or vice versa. 6.OOF LOADS R Rafter spans are tabulated for the most common roof loads. The loads are based on adjusted roof snow loads from the governing building code. For roof live
Spans are given in feet and inches and are the maximum allowable horizontal span of the member from inside to inside of bearings. For sloping rafters, the span is also measured along the horizontal projection.
Span Options Calculator for Wood Joists and Rafters
Span Options Calculator for Wood Joists and Rafters Performs calculations for ALL species and grades of commercially available softwood and hardwood lumber as found in the NDS 2018 Supplement. Joists and rafter spans for common loading conditions can be determined.
Span and Size Charts for BCI Joists | Boise Cascade
Learn more about BCI® Joists and our sizing software BC Calc® or view the US East and US West span and size charts.
Joists & Rafters - SFPA - Southern Pine
The 46 span tables below are for three types of framing members: floor joists, ceiling joists, and rafters. Spans in the tables are listed in feet and inches and are the maximum allowable horizontal span from inside-to-inside face of supports.
Span Tables For Joist And Rafters - RedX Apps
Explore our comprehensive span tables for joists and rafters. Determine the correct size and spacing for your building project to ensure safety and stability. Find the right span table for your needs and optimize your construction design.
Rafter spans are tabulated for the most common roof loads. The loads are based on adjusted roof snow loads from the governing building code. For roof live loads less than 20 pounds per square foot (psf), rafter spans and required E values tabulated for 20 psf shall be permitted to be adjusted in accordance with the follow-ing table: For roof ...
Distances in this hole chart are based on uniformly loaded I-joists and allowable I-joist reactions without web stiffeners on minimum required bearing lengths. This chart conservatively accounts for the worst case created by the allowable simple or multiple floor spans shown elsewhere in this guide at on-center spacings of 12”,