How Posts To Support A Roof

The determining factor of post spacing is the allowable span of your beams.

How posts to support a roof.

Most deck roofs require separate footings from the deck to support the weight of the roof throughout the seasons. For a freestanding overhead you will need to erect a post slightly taller than the desired height mark the height on the post and work from it as. Step 2 post height. The main structural members of patio and deck overheads are posts or columns and beams which run from post to post or from post to ledger.

2x4s would need to be cut to size an inch or so longer than the column and then. A roof jack is the best choice for this job although some people choose to use 2x4s. The length of your posts will help determine the height of your carport roof. The larger the roof is the more support that you are going to need.

Because the column is likely supporting a heavy roof structure a temporary support will need to be used. However if the spacing is too wide the patio cover s beams will bow under the weight of the joists and roof covering materials. The beams support the roof rafters or joists which in turn hold the roofing material. If the deck doubles as a porch it needs to be able to support no more than 80 psf.

Pergolas or pavilions provide a way to spend time outside shielded from sunlight or light rain. Large 8 x 8 posts are necessary for the use of supporting a porch roof. How to raise a porch to replace the column is a matter of choice. Measuring posts for a freestanding roof differs in only one respect from measuring for a house attached roof with the attached roof you ve already defined the roof height at the ledger line.

20 6x6 pt posts would be long enough to use as both deck support and roof support but the expense isn t justified because all that is needed to support the roof would be 4x4s. For deck roof posts dig holes for the roof posts and pour cement to keep them secure. Porch decks also require larger footings than deck footings. For larger porches such as wrap around porches you will want to make sure that the support is more than you need.

The second factor will be the depth these posts are planted in the ground. For post material choose one such as pressure treated pine that will resist rotting and insect damage when it is planted in the ground. How to replace a free standing roof post.