Using Pressure Treated Wood For Floor Joists

The allowable stresses of pt lumber are lower than non treated lumber which means it can not span as far.

Using pressure treated wood for floor joists.

Kiln dried treated carcassing 9 width. In situations when sistering damaged floor joists with lumber of similar dimensions it can be easy to notch and slide the sister board into place. Pressure treated lumber is also essential for exposed areas of the shed that may be exposed to the weather and water. Perry mastrovito design pics getty images.

But the 2015 irc included a new one table r507 5 that will make it easy for deck builders to spec a joist size for a given span and joist spacing. This treated lumber is bolted to the foundation and the floor joists typically rest on it. Be sure also to use ground contact pressure treated wood for any framing that will touch the ground. Any wood on a foundation wall and is less than 8 from the exposed ground.

Girders in crawl spaces are closer than 12 to the ground. However doing this does not fix the slant that the floor has taken since the old joists got damaged. Also pt lumber is corrosive so connections need to be such that they resist corr. Use decay resistant wood.

Use pressure treated plywood that is attached to floor joists with exterior grade screws. The first piece of lumber commonly attached to the top of a house foundation is often called a sill plate. Until a few years ago the irc didn t have deck joist span tables. Decks get wet and may be framed with incised treated lumber so spans may have to be adjusted.

45 mm 1 70 mm 1 95 mm 1 120 mm 1. Exterior grade nails can be used but heavy traffic will cause them to slightly flex out and eventually. Yes pt lumber can be used for framing including floors. Take some extra time and jack the damaged area up so that the new lumber doesn t need to be notched.

The ends of wood girders entering into masonry foundation walls with less than 1 2 clearance. Interior walls are within a climate controlled environment and are presumed to be free of moisture. The table includes spans for. Floor joists in crawl spaces are closer than 18 to the ground.

Cleaning equipment pressure washers vacuum cleaners dryers floor cleaning. A floor close to the ground won t last as long using non pressure treated wood. You can watch an informative video that shows a treated lumber sill plate and how it rests on a foundation. The chemicals used in pressure treating lumber including fire retardant chemicals are corrosive to bare steel and could weakend joist hangers potentially leading to collapse during fire.

Fsc standard kiln dried regularised c16 treated carcassing 220 x 45mm.