How To Jack Up A Floor Joist

The only tools required is a bottle jack string straight claw hammer circular saw and a light source.

How to jack up a floor joist.

The screw jack is attached with nails to the underside of the girder and to the wood block atop a concrete pier. After the old joist is lifted by the jacks the new joist will now sit on the supporting walls or wall and i beam in our case while the old is lifted off of the structure. Total cost was less than 200 while a pro would charge 500 1000. Set a hydraulic jack and post under the beam and jack up the joists about 1 8 in.

This job took two people one afternoon. It consists of two heavy steel pipes one inside the other. A screw jack is a metal support post that can be adjusted to level the floor. When a floor in your home begins to sag it indicates it is receiving insufficient support due to a structural deficiency.

The inside pipe is threaded and adjusted up and down by turning a large wing nut. If the correction is minor only a 1 4 inch over an 8 foot span using shims between the floor joist and the subflooring can often rectify it without the need to raise the floor joist with a jack. To correct this you can use a screw jack to lift the joist until the floor is again level. Tack a beam under the sagging joists.

A day until they re level. The idea behind sistering joists is that you jack up the sagging original joists add the new ones next to the old and join them together. Jacking up a ceiling joist or beam is a process that requires the use of a screw jack. Wooden shims are often used to work out squeaks and stabilize spongy areas but they can also be used for slight adjustments to specific places.

Nailing two 2x4s together will work to span about three joists unless the sag is under a weight bearing wall. Make repairs to settling piers and weak joists to fix swagging floors and roof lines. Jacking up a floor and leveling it is easy with these simple instructions. Cost time and skills.