Pressure Treated Floor Joist

He sees it all the time.
Pressure treated floor joist. Pressure treated thick deck decking board model 107979 20 98 20 98. The chemicals used in pressure treating lumber including fire retardant chemicals are corrosive to bare steel. Learn when to use pressure treated lumber according to the 2012 international residential code. Find out why this preferred framing system should be built into your next project.
2 grade of douglas fir are indicated below. The table accounts for wet service conditions and an incised lumber reduction for species commonly incised for pressure treatment penetration. 1 psf lbf ft2 47 88 n m2. Based on information found in section r317 beginning on page 65 of the 2012 irc book.
I did have to use 2 4 blocks on the low side. So he has two rot fighting tips for deck owners and builders. I built a 12 x 24 shed 27 years ago with untreated 2 x 6 joists sitting on treated 4 x 4 runners sitting on solid 4 blocks sitting directly on the ground. Species sizes of pressure treated wood treated wood is generally available as dimensional stock in 2x4s 2x6s 4x4s and 2x2s for rail components.
Live load is weight of furniture wind snow and more. Maximum floor joist span for no. 2x8s 2x10s and 2x12s for joists stair stringers and beams. The table has two column sections one for joists without a cantilever and one for joists with a cantilever.
6x6s for support posts and plywood. Note that pressure treated pine is my building material of choice but can be substituted with naturally durable heart woods from redwood cedar black locust and black walnut. Also pt lumber is corrosive so connections need to be such that they resist corrosion. But my friend wasn t.
5 4x6s and 2x6s for decking. Deck joists rotting from the top edge down because the deck boards and debris keep them damp for weeks after rain. Set your store to see local availability compare. The predominant species of treated wood is a regionally available softwood.
The joist hangers used in construction with both sawn lumber and manufactured joists. Yes pt lumber can be used for framing including floors. Premium pressure treated lumber model 159091 16 57 16 57.