Flat Roof Joist Overhang

If you want need a soffit don t forget to leave enough overhang on the ends of the joists.

Flat roof joist overhang.

Click the button to calculate the stock size needed for this job. Time and i ve figured out that 14 i joists at 2 on center is similar to 2 12 s at 16 on center the span is about 22 feet 10 pitch. The lanterns hanging over the green couches accentuate the japanese style of this patio. This house will have a gable roof and a 16 center area with a cathedral ceiling over the living and dining room areas the roof pitch will be 5 12 with a cathedral ceiling at a 2 5 12 slope the overhang will be 2 around the whole house the trusses on the ends of the house will be drop top gable trusses.

Hi we recently completed an extension which had a flat roof. The figures are based on quality materials. This patio roof conjures up images of japanese houses. 9 x 3 joists were used as.

On a two story house you can usually tie the ledger into a band joist also called a rim joist located between the floors as shown below. Because this style of a shed has a flat roof it can facilitate a wider overhang which is ideal for storage. If attaching a patio roof to a ledger beneath the eaves does not allow for enough headroom you can set the new patio roof s rafters on the wall s top plate. Area span on the flat please enter area span on the flat in foot.

With a flat shed roof the roof simply extends past the wall plate to provide an overhang. For gabled roofs the roof rafters extending beyond. The latticework allows natural light to pass through so that you will be covered partially. Input the rafter span on the flat eave overhang and pitch of the roof.

The tables below give maximum spans for rafters and beams. I m trying to balance cost vs. This calculator is to be used as an estimating tool only. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.

You will need to make a ladder on the two side walls which has the same amount of overhang as the front edge so that you get an even soffit all around the roof. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. I m starting the roof on my house next week.