How to Add Strength to Wood Trusses How to Add Strength to Wood Trusses

What You'll Need
Wood screws

Over time, heavy loads and dry rot can weaken wood trusses. Strengthening a wood truss is possible with the right tools and materials. This home improvement project will take about 2 hours to complete.

Step 1 – Measuring the Truss

Use a tape measure to determine the length of the damaged area and the width of the truss that has become weak. The width of the truss will most likely be either 3½ inches or 5½ inches. Add 12inches to the length of the truss to determine the measurement you will use.

Step 2 – Cutting the Support Board

Use your saw to cut a piece of plywood to support your truss. Use plywood that is ¾-inch thick. Use the width and length measurements you have determined to cut the piece. Cut a second piece the same size as the first one.

Step 3 – Securing the Support Board

Secure the support boards to both sides of the weakened truss. Use wood glue to secure the support board to the truss. Use your C-clamps to secure the support board. Secure 3-inch wood screws through the plywood and into the truss. Be sure to keep the screws away from the most weakened area.

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