![]() ![]() Joists are technically beams that typically spans relatively short distances compared to beams and are made of wood, steel, or engineered wood or lumber. It is like the skeleton/ framing of a building that supports the load which the floor is built to bear. They transfer the dead load of the subfloor and floor finishes and live load of people, furniture and furnishings to beams, walls, headers, or foundation walls. Their function is similar as beams, except floor joists are supported by wall, foundations, or beams framing.įloor joists usually run between walls or rafters to support a ceiling or floor. Floor joists are typically a horizontal structural member that runs across an open space of building on supporting wall or studs. The other surfaces are the walls, which the joists span the distance between, providing a source of support to keep the walls from shifting.įloor joists can be define as several small beams. ![]() The first surface is, unsurprisingly, the ceiling, the materials of which attach directly to the joists. Grade 1 lumber have higher strength than other grade Lumber due to fewer knots.Ĭeiling joists provide support for more than one surface in your home. ![]() Southern yellow pine is strongest species of wood that can span more distance compared to other species of wood. There are different depth of floor joist made of timber are used in floor construction such as 47×120, 47×145, 47×170, 47×195, 47×220, 75×175, 75×220 etc made of different species of wood (southern yellow pine & Douglas fir) and different grade such as grade – 1, grade – 2, grade – 3. It is used as floor joist, ceiling joist, pitch roof rafter, flat roof rafter, purlin and Binder. There are many species of wood/ timber or dimensional lumber used in house construction as wood frame structure. ![]()
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