Roof Ridge Beam Size

Ridge boards can only be used in roofs with slopes from 3 in 12 up to 12 in 12.

Roof ridge beam size.

For the initial calculation f can be estimated at 1 000. Also see assumptions for table development. The total load is 4 000 pounds. Ridge beam sizing is based on the span of the beam between supports and the amount of roof load supported by the beam.

Refer to sfpa s publication southern pine headers beams download in publications that includes all size selection and allowable load tables. Structural ridge beam span calculator posted on april 7 2020 by sandra rafter to ridge beam connection framing roof ceiling construction structural ridge beam absolute deflection in a ridge beam structural ridge beam tricks of the trade. No matter what the specs say. F stands for the beam s fiber strength in bending which depends on the species of wood.

It has been my experience to never use a beam smaller than a two ply 2 x 8. 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. Loading conditions are detailed below. For each application a pdf download is available.

For example if the slope is 4 in 12 and the run is 12 feet the ridge beam height m will be 4 feet.