Roof Ridge Beam Span Table

As the table shows no 2x8 s meet the span and spacing requirements but a 2x10 with an e of 1 300 000 psi and fb of 1093 psi can span 15 feet 3 inches more than enough.

Roof ridge beam span table.

You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Engineered wood products ewp lvl span and size charts. Versa lam laminated veneer lumber lvl beams and headers eliminate twisting shrinking and splitting and deliver flatter quieter floors and structures. Continuous span beams are beams supported at three or more points along their length.

Roof beams 20 verandah beams 22 garage roof. For each application a pdf download is available. Pitching beams 23. A 2x12 with an e of 800 000 psi and fb of 790 psi also works since it can span 15 feet and 10 inches.

The figures are based on quality materials. For lesser grades spans should be shorter. Loads are calculated in accordance with table 3 1 of as nzs 1170 1 2002. Refer to sfpa s publication southern pine headers beams download in publications that includes all size selection and allowable load tables.

Distance from roof beam to next roof support i e the span of the rafter or roof truss from the roof beam to the next adjacent beam or wall. The spans in this table are based on a maximum supported rafter span of 16 feet where the supported span is the total horizontal distance spanned by the roof rafters divided in half not the diagonal distance or the length of the rafter. Design of single span ridge beams in roofs in houses office buidlings schools and other structures. The spans given in these tables have been developed by experienced timber.

So this table could accommodate a house with a total rafter span or house width of 32 feet. The tables below give maximum spans for rafters and beams. Span tables use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Also see assumptions for table development.

Keep in mind that these are maximums in other words shortening spans slightly will result in a more solid structure. Our versa lam lvl is manufactured in either alexandria lena louisiana in eastern united states or in white city oregon for the western united states. Then drop down to find the appropriate fb value for the span.