Supporting Basement Ceiling From Floor Joists

If your house is built over a basement first inspect all of the basement support beams and posts where they meet the floor.

Supporting basement ceiling from floor joists.

Common sense tells you that large floor joists can carry more load and spacing joists closer together also increases the load bearing capacity of a floor. For now we ll look into supporting the floor joists with a floor joist beam. Then attach the sister joist using three 16d common nails driven every 16 in. They are made from metal and have an adjustable screw top that can be raised to fit the space between the floor and ceiling of the basement.

Be suspicious of wood posts set on dirt floors or wood posts with concrete poured around the post bases. When a load is applied to a joist the wood fibers along the bottom edge go into tension and those along the top go into compression fig. Gluing and screwing a 3 4 attic subfloor and providing solid bridging should also be. Driving 16d common nails in old hard wood is difficult.

Replace a rotten lally a proper footing and post add floor support that will never fail again. Stiffening a floor in this q. Insulate basement rim joists. Predrill and drive 3 8 in.

Lag screws if you re having trouble nailing. How joists support floors and ceilings joists the horizontal members that span two walls and or beams have to carry the weight of the walls people furniture appliances and other stuff we place on them. The extra two inches of vertical distance when a floor is framed with 2 x 10 joists rather than 2 x 12s can be quite important for example. Additional support for the floor joists is achieved by nailing the ends of the joists into headers.

A basement post is usually installed to counteract a sagging frame in a wood frame house. When the sagging joists are level apply a generous bead of construction adhesive to the existing joist. Place support of the floor joists with wood studs. Find jack posts at lowe s today.

By jacking up the ceiling of the basement you. The widest span in the floor joist span table in part 2 of this tutorial module showed that floor joists can span 17 2 if they are 2 x 12s spaced 12 o c. As the posts slowly rot and melt into the floor the house settles accordingly bottom to top. But larger is not always better when builders are constructing a home or adding a room addition.

Typically the posts are eight foot adjustable devices that can be placed under a sagging beam or floor joist.