Jacking Up A Floor Joist

The 4 inch lally posts can be replaced by 6 x 6 inch lumber.

Jacking up a floor joist.

Jacking up a floor and leveling it is easy with these simple instructions. 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. A day until they re level. Figure 3 jacking up floor joists.

If a crack or sag is isolated to one area the sister joist should extend at least 3 ft. Shows raisinge a sagging floor gradually with bottle jacks. 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. Place support of the floor joists with wood studs.

By jacking up the ceiling of the basement you. Make repairs to settling piers and weak joists to fix swagging floors and roof lines. Set a hydraulic jack and post under the beam and jack up the joists about 1 8 in. Raise each jack by 1 8 inch at a time this will help to reduce any damage to window frames and plaster or drywall walls above the floor.