Search for: calculators

AWC Releases Update to Span Calculator

by on March 8, 2022

LEESBURG, VA. – The American Wood Council (AWC) has released an update to the mobile apps and web-based Maximum Span Calculator for Wood Joists and Rafters to include the design values as found in the 2018 National Design National Design Specification® (NDS®) for Wood Construction Supplement. The mobile apps and the web-based calculator were also updated to include design values for non-North…

AWC Releases Updates to Connection Calculator 

by on April 18, 2025

LEESBURG, VA. – The American Wood Council (AWC) released an updated version of its Connection Calculator. The Calculator supports users by calculating capacities for single bolts, nails, lag screws and wood screws based on the provisions of the 2024 National Design Specification for Wood Construction (ANSI/AWC NDS-2024).  Key updates include adding the design provisions for…

Mass Timber Requirements Added to Free Heights & Areas Calculator

by on December 16, 2024

2021 Code Conforming Wood Design Also Available LEESBURG, VA. – The American Wood Council (AWC), International Code Council and WoodWorks have joined together to release an updated version of the free app to calculate maximum allowable heights and areas for buildings of various occupancy classifications and types of construction. The Heights & Areas Calculator is…

Does the wet service factor apply for residential wood decks?

Wood members that are protected from direct moisture in building construction reach an equilibrium moisture content below 19%, which is considered dry service conditions. Design values assigned to lumber and engineered wood products in the AWC National Design Specification® for Wood Construction (ANSI/AWC NDS®) and the NDS Supplement are based on the assumption of dry service conditions. When wood…

Where can I get span tables and span table information for lumber? Where can I get decking span tables?

A variety of Span Table Documents and Span Calculator products are available for use in wood building design, complete with a tutorial for their use. The online AWC Span Calculator performs calculations for ALL species and grades of commercially available softwood and hardwood lumber as found in the NDS Supplement. There are also several other online span tables available for…