How Many Posts To Support A Roof

If the deck doubles as a porch it needs to be able to support no more than 80 psf.

How many posts to support a roof.

Here we look at the most common. Porch decks also require larger footings than deck footings. Your porch roof will need to have a lot of support in order for it to stay up through the seasons. Most deck roofs require separate footings from the deck to support the weight of the roof throughout the seasons.

Determine how much support is needed. Posts and footings support the weight of your house so you have to size them right. Patio roof posts columns. You will need to plant a minimum of six posts that will support your carport roof.

A 12 inch diameter footing would suffice for footings in gravelly soil and the depth would depend upon frost levels. The number size spacing of the suports depends entirely on the depth strengh of the header spanning them. These will include one at each corner and two in the center. In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts.

Consult with a structural engineer local building officials and contractors who specialize in this work. Step 1 post material. Posts and columns may be made from several types of materials. Solid lumber such as 4 by 4s 6 by 6s and 8 by 8s.

Keep in mind that these figures depend on the size and spacing of joists and the overall structural loads. Just as an example have an open porch approx 40 long 8 deep supported. Most metal companies require support for metal roofing or siding at a maximum of 2 therefore wall girts and roof purlins should also be spaced no farther than 2 o c. For deck roof posts dig holes for the roof posts and pour cement to keep them secure.

A 4 by 10 can usually span up to 12 feet between posts. If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts. Knowing which material to use and where to plant your posts are important factors in building a secure carport. Load bearing posts must have a solid footing on undisturbed soil and all parts of the post must be fastened together.

Cut beams to fit. Sometimes they e built up from more than one size of lumber. 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. Go to sutherlands post frame building packages.

How to support a porch roof. Therefore take the total weight divide it by 2 3960 lbs and then divide it by the number of posts usually 2 1980 lbs or 3 1320 lbs. Or as required by design.