How Many Posts To Support A Roof

How to support a porch roof.

How many posts to support a roof. Or as required by design. If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts. Patio roof posts columns. Porch decks also require larger footings than deck footings.

Most deck roofs require separate footings from the deck to support the weight of the roof throughout the seasons. Load bearing posts must have a solid footing on undisturbed soil and all parts of the post must be fastened together. 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. Step 1 post material.

Solid lumber such as 4 by 4s 6 by 6s and 8 by 8s. Cut beams to fit. For deck roof posts dig holes for the roof posts and pour cement to keep them secure. Keep in mind that these figures depend on the size and spacing of joists and the overall structural loads.

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. Any post that will touch the ground should be pressure treated for decay resistance. Sometimes they e built up from more than one size of lumber. In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts.

Go to sutherlands post frame building packages. You will need to plant a minimum of six posts that will support your carport roof. Your porch roof will need to have a lot of support in order for it to stay up through the seasons. Posts and footings support the weight of your house so you have to size them right.

Consult with a structural engineer local building officials and contractors who specialize in this work. 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. Determine how much support is needed.

A 4 by 10 can usually span up to 12 feet between posts. A 12 inch diameter footing would suffice for footings in gravelly soil and the depth would depend upon frost levels. 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. Here we look at the most common.

Continue installing porch. Knowing which material to use and where to plant your posts are important factors in building a secure carport. Posts and columns may be made from several types of materials.