Floor Joist On Concrete

Can i just lay my floor joist directly on the concrete.

Floor joist on concrete.

They are usually made of concrete steel or wood. The strongest way to install floor joists is to create a concrete ledge on the inside face of the wall. 69 chapter 4 floor construction woodframe floor systems and concrete slab on grade floors are discussed in this chapter. The spi keystone joist system combines the long span benefits of prestressed concrete with all the advantages of a monolithically poured concrete deck.

Joists must exhibit the strength to support the anticipated load over a long period of time. Or use regular. To create a ledge you can use special brickledge blocks which most major manufacturers offer in common widths. They help support main floors above the crawlspace.

That would not be allowed in my area and they use the minimum height in crawlspace to enforce it with the local requirement being 36 inches. Reinforcement rebar or steel fibers is placed and the concrete actually expands as it cures resulting in tensioning of the steel. Our composite system is economical fast and virtually maintenance free. The procedure for installing a floor structure over a slab with 2 by 6 joists can be.

This is probably the best option for extremely heavy floors such as pre cast planks or second story garages. Shrinkage compensating concrete type k with an experienced contractor and designer can allow a reduction or elimination of joints. Rather the reader is referred to the aisi standard for cold formed steel framing prescriptive method for one and two family dwellings aisi 2001 for guidance. In many countries the fabrication and installation of all framing members including joists must meet building code standards.

While some floors are built directly on a concrete slab those built above open areas such as crawl spaces basements and lower floors almost always use a floor joist system to provide weight bearing support for flooring furniture people and everything else in your home. I ve done joist on concrete and seen it done in other parts of the country but i never liked it. Building a framed wood floor over an existing concrete slab can provide the space needed for electric wiring heat venting plumbing drain lines and added insulation when remodeling a basement or garage space. Eventually the concrete shrinks back and behaves similar to a post tensioned.

Considering the cross section of a typical joist the overall depth of the joist is critical in establishing a safe and stable floor or ceiling system.