How to strengthen beams using plywood.
Strengthening roof joists.
Choose ring shank nails or screws that are long enough to penetrate the joists by 11 2 in and space them every 6 in.
You can however strengthen the joists.
This is also routine procedure for some ceiling or floor joists that are manufactured in.
In the case of 2x6 joists you can pair them up with additional 2x6 joists by nailing them together side by side.
Strengthening existing roof rafters is a difficult process that often requires professional help.
Add an additional row of fas teners midway between the joists to pull the layers tightly together.
When installing on the underside of the joists the process is the same.
If you have a stick frame roof there are a few basic techniques that you can use to strengthen your rafters.
Sistering is the process of adding a new joist next to each existing joist.
Joists and orient panel ends over joists.
Snow increases the overall weight of your roof adding to the forces acting on your rafters.
As incremental parts of a building s structure joists are not easily replaced.
If the attic joists are not adequate one way to strengthen the floor for live loads is to sister the old joists.