Step 11: 2"x4" Diagonal bracing.

Diagonal 2"x4" bracing boards should be placed between the 4"x4" posts along the outside perimeter of the deck, and the 4"x4" posts nearest to the pool wall. Starting with the three sides that are not directly next to the pool. Place a 2"x4" board diagonally behind the 4"x4" posts. With a pencil, mark/scribe the angle at each end and cut to fit. Attach the 2"x4" diagonal bracing board by toe-screwing two - 2 1/2" deck screws from each side. Repeat this process while alternating angles from section to section.

The 2"x4" diagonal bracing boards along the pool's edge will need to have a "compound miter angle." To achieve this use a 2"x4" bracing board that is slightly longer than the distance between the 4"x4" posts. Hold the board diagonally behind the 4"x4" posts. With a pencil, mark/scribe the vertical angle at each end. While holding it in the same position, eye-ball the second horizontal angle and mark a line parallel to the 4"x4" post onto the 2"x4" bracing board.

Cutting a compound angle: Set the 2"x4" bracing board flat on a compound miter saw. Adjust the saw's table angle to the scribed vertical angle. Adjust the saw's blade angle to the eye-balled horizontal angle. Both angles will be cut at once. Make the first cut longer than needed to ensure the angles are set properly.

Secure the 2"x4" diagonal bracing boards by toe-screwing two - 2 1/2" deck screws from each side. Repeat this process alternating angles from section to section.