Roof Ridge Beam Size

Ridge beam sizing is based on the span of the beam between supports and the amount of roof load supported by the beam.

Roof ridge beam size.

In the example the beam spans the 10 foot width of the roof. For each application a pdf download is available. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

Covers any span and every load with pin point accuracy. Loading conditions are detailed below. 2 pine or lvl. 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.

Ridge boards can only be used in roofs with slopes from 3 in 12 up to 12 in 12. Calculate the size needed for a beam girder or header made from no. F stands for the beam s fiber strength in bending which depends on the species of wood. This hip roof calculator returns the value of the common rafter the side rafter the length of the hip the off set of the hip the height of the.

Also see assumptions for table development. 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. Refer to sfpa s publication southern pine headers beams download in publications that includes all size selection and allowable load tables. For example if the slope is 4 in 12 and the run is 12 feet the ridge beam height m will be 4 feet.

No matter what the specs say. The pitch and the thickness of the ridge. For the initial calculation f can be estimated at 1 000. A ridge board is a non structural member that serves as a prop for opposing rafters to rest against and connect to.