How Far Apart Do You Put Boards For Porch Roof

Once you ve calculated the number of trusses you will need you should purchase the lumber.

How far apart do you put boards for porch roof.

Putting the trusses into place. Total height of low level ground level deck. A 4 by 10 can usually span up to 12 feet between posts. In this example the section of roof is 20 feet wide and 14.

So the space between rafters can be greater without reducing the maximum span. Most are spaced between 18 26 inches apart. I am building a 10 x12 deck not attached to a ledger board. Apr 28 20 11 17 am.

Common spacing for trusses on this type of building is often between 2 and 4 feet but trusses built with advanced designs may allow spacing as great as 8 or 12 feet. Measure the section of the roof from the fascia to the peak and divide this by two which is the two foot spacing of the wood nailers. If you move up to 4 by 8 you re usually allowed to span up to 10 feet between posts. In general the maximum span for a 4 by 6 beam is 6 feet between 4 by 4 posts.

There is also a potential trip hazard if the boards are installed so far apart and so wet that as the boards dry in dry climates and weather that their shrinkage opens the gaps to 1 2 or more. The trusses should be a little longer than the exact width to allow for overhang and you will need sufficient trusses to mount across the length. The smallest beams for patio covers are typically 4 by 6. This table agrees that 10 12ft is the max span for typical grade lumber at typical spacings for a 5psf dead load.

The same concept holds true for roof trusses. I am looking to install privacy screens on my concrete patio.