Roof Ridge Beam Size

These small areas are usually door opening on the interior and people are trained that these areas are the strongest place in a house to be in the case of an emergency.

Roof ridge beam size. The total load is 4 000 pounds. Ridge boards can only be used in roofs with slopes from 3 in 12 up to 12 in 12. Loading conditions are detailed below. For each application a pdf download is available.

In the example the beam spans the 10 foot width of the roof. If you know the slope x in 12 you want to use for your roof framing design you can use it along with the run r to determine the height of the ridge beam. Ridge beam sizing is based on the span of the beam between supports and the amount of roof load supported by the beam. For example if the slope is 4 in 12 and the run is 12 feet the ridge beam height m will be 4 feet.

Also see assumptions for table development. For the initial calculation f can be estimated at 1 000. Refer to sfpa s publication southern pine headers beams download in publications that includes all size selection and allowable load tables. It has been my experience to never use a beam smaller than a two ply 2 x 8.

A ridge board is a non structural member that serves as a prop for opposing rafters to rest against and connect to.