Strengthen Floor Joists From Above

Set a hydraulic jack and post under the beam and jack up the joists about 1 8 in.

Strengthen floor joists from above.

Tack a beam under the sagging joists. To keep the walls above from cracking and to prevent other damage the joist sag is lifted a tiny bit at a time usually no more than 1 4 inch every few weeks. The joists are quite small 5 5 inch x 2 5inch with tiles above so i would also to take this opportunity to strengthen the floor as i think we re borderline on the deflection front and i dont fancy doing the floor again. Jacking them up too fast may cause cracks in the walls and floors overhead.

Sistering is the process of adding a new joist next to each existing joist. The nice thing about a beam and. Lay the new sheets perpendicular to the floor joists and orient panel ends over joists. A day until they re level.

Choose ring shank nails or screws that are long enough to penetrate the joists by 11 2 in and space them every 6 in. As incremental parts of a building s structure joists are not easily replaced. Add an additional row of fas teners midway between the joists to pull the layers tightly together.