Pressure Treated Wood For Deck Joists

Section r507 5 notes that deck joists can cantilever up to 1 4 of the joist span.
Pressure treated wood for deck joists. Failure to use proper flashing approved flashing tape and or proper deck drainage systems will void the warranty. Recommended or allowable joist beam spans. Pressure treated wood is required whenever you attach framing lumber or furring strips directly to concrete or other exterior masonry walls below grade. Pressure treated thick deck decking board model 107979 20 98 20 98.
Interior walls are within a climate controlled environment and are presumed to be free of moisture. But you ll notice when you look at the portion of the span table for joists with cantilevers that the joist span for decks with a cantilever is often less than the span for the same sized joist without cantilevers. If repairing a damaged joist support the deck on one side or it could crash. 2x8s 2x10s and 2x12s for joists stair stringers and beams.
For best results refer to our wood and composite deck joist span table. Set your store to see local availability. Note that this requirement is only for exterior walls as these may wick moisture onto the lumber. This article explains typical spans for deck joists deck beams and deck flooring giving both standard span tables and a quick rule of thumb that works pretty well.
Deck joists rotting from the top edge down because the deck boards and debris keep them damp for weeks after rain. The larger the deck the larger the joists. 5 4x6s and 2x6s for decking. Pressure treated wood column model c63202d 163 14 163 14.
The joists were pressure treated lumber so i was surprised at how badly decayed they were. If a cosmetic issue remove the plank flip and refasten. Our page top photo shows a small deck addition to a 1920 s bungalow in poughkeepsie ny. So he has two rot fighting tips for deck owners and builders.
6x6s for support posts and plywood. Repairing a small area of your deck can save you time and money. Set your store to see local availability. But my friend wasn t.
Use pressure treated lumber when you install the joists. Perry mastrovito design pics getty images. Treated wood is generally available as dimensional stock in 2x4s 2x6s 4x4s and 2x2s for rail components. The predominant species of treated wood is a regionally available softwood.
This guide will teach you to safely repair any deck or joist. Deck drainage systems that cover upward horizontal surfaces of pwt treated lvl joists and beams preventing wetting from occurring are acceptable substitutions for flashing on the joists and beams. He sees it all the time. Species sizes of pressure treated wood.