Roof Header Span Table

View joist rafter tables.

Roof header span table.

All other data is available on page 121 of the 2012 international residential code. Roof rafter span use this table to determine the maximum lengths of roof rafters based on species and grade of lumber spacing dimensions load and slope. Rim board header size material and span shall be in accordance with table r602 7 1 rim board headers shall be constructed in accordance with figure r602 7 2 and shall be supported at each end by full height studs. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot.

Maximum rafter spans for a patio roof. Click on the appropriate beam this will take you to the calculation table for your project. Simplified maximum span tables for selected visual and mechanical grades of southern pine lumber in sizes 2 4 thru 2 12. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters.

Determine the beam header span length and the span carried supported by the beam header. Fill in the parts of the formula that are already known. L stands for the span of the beam in feet. Girder spans and header spans for exterior bearing walls maximum spans for douglas fir larch hem fir southern pine and spruce pine fir and required number of jack studs.

A header with a 4 6 rough opening carries 15 0 simple span joists on each side. Table number grade live or ground snow load psf dead load psf load duration factor c d. Using the simple span floor joists table with 30 0 span carried select 3 1 2 x 5 1 2. Select the span carried by the header across the top of the table.

These charts are for 30 pound per square foot snow load on the roof. Span charts and 2012 irc building codes for girders and headers. Includes span tables for all load bearing locations and the number of jack studs. The number of full height studs at each end shall be not less than the number of studs displaced by half of the header span based on the maximum stud spacing in accordance with.

An essential part of planning a patio roof or gazebo project is determining the number size and spacing of rafters beams and posts according to the loads they will carry. In the example the beam spans the 10 foot width of the roof. The column on the left of each chart labeled beam span represents the beam length with bearing required for your project. Read the header size or choice of header sizes from the table.

Window door garage door headers supporting roof loads only. Floor joist span use this table to determine the maximum lengths of floor joists based on species of lumber joist spacing and joist size. For heavy roofs or in. F stands for the beam s fiber strength in bending which depends on the species of wood.