Attic Joist Reinforcement

You can strengthen the roof to prevent damage by adding braces to the roof rafters inside your attic.

Attic joist reinforcement. In massachusetts attic floors must support at least 30 lbs ft live load the same as bedroom floors if the attic is accessed by means of a fixed stairway 780 cmr 5502 3 1 use a span table to determine the necessary joist dimensions given their span length spacing wood species and grade. Often existing joist bays are filled with electrical and heating ducts that will need to be relocated. Sistering installing new larger joists next to the existing ones is one way to bring your attic floor up to code. For slightly better bracing across the entire depth of the assembly you could instead use 2x12 blocking or double 2x6 blocks one layer for the top joists and one for the bottom.

Positioning the new joist adjacent to the existing preserves precious ceiling but it does come with some potential complications. The type of modifications selected for reinforcing the joists will depend on the recommendations of the engineer but the following methods are commonly used to beef up undersized attic joists. How to reinforce an attic floor with sister joists clear the joist spaces pull out all insulation and any debris from all of the joist spaces so you can see the full. A steel plate can be used the same way.

Now it is time to use some wood and screw it into place on the original joist as well as the cross beam. The solution is simple sister on an 18 gauge 1 5 8 x6 steel stud material to act as a joist running plate to plate. But 2x8s should work fine and will save labor and materials. A raised platform of lumber in dimensions of 2 4 or 2 6 with insulation placed between joists and covered up with a 12 inch plywood helps build the right flooring.

This is a fairly basic project that can help protect your roof but consult a structural. Installing flooring material over the attic doesn t quite leave room for the recommended insulation space needed to provide efficient home energy. Screw the metal joist to the existing wood ceiling joist and to each plate and you have very effectively reduced the load deflection of any stored attic loads for little cost. Measure the old joists measure the length of the old joists and note how much they overhang any supporting walls or.