#56 lvl ridge beam span table code#

A new method of analyzing joist cantilevers resulted in a new deck joist span table with the maximum cantilever based on the adjacent joist span rather than the joist spacing.Īnother change provides generic instruction for construction of guards so they can resist adequate lateral load. Revised deck joist span tables, deck beam span tables, and deck ledger connection tables were added that cover 50, 60, and 70 psf snow loads in addition to 40 psf live loads. The deck post height table was revised to make the post height based on tributary area of the post. It revised the footing sizes in Table R507.3.1, allowing some smaller footing sizes for members with lower demand loads.

It clarified that decks are designed for either the live load or the ground snow load, whichever is greater. One change made general improvements and expanded the use of the tables throughout the section. For the 2021 IRC, seven of their proposals were ultimately approved, making significant improvements to the deck section.

#56 lvl ridge beam span table code#

This post will continue with the primary changes to Chapters 5 through 8 of the IRC.įor the 2018 and the 2021 IRC, an informal group known as the Deck Code Coalition had been working to develop detailed prescriptive requirements for the safe construction of decks.

In the last post, we described the primary structural and wood-related changes in the 2021 International Residential Code, Chapters 3 and 4.