I Beam Roof Span

So if your house is 26 feet wide and the roof ridge beam is centered on the house you will need a rafter that can span 13 feet.

I beam roof span.

Beam calculator clearcalcs timber steel framing manual single span roof beam steel beam calculator user deflection limit for steel beams supporting masonry parions steel c channel sizes structural. 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. According to the 2012 irc codes any beam joist or header shall never have a bearing of less than 1 1 2. Have on the system.

Engineered wood products ewp span and size charts for bci joists. Span of beam inches tributary width inches uniform load pounds square foot e g. The maximum spans in the table above are for the horizontal distance the rafter can span not the diagonal distance or actual length of the rafter. Leave a reply cancel reply.

For example you can span a 1 grade no knots southern yellow pine a greater distance than a 2 grade with knots southern yellow pine. Anything 5 and above we always at least double cripple. Wood beam calculator american wood council website rafter and joist span faq. Sizing a steel beam.

Consideration might also be given to cases in which a joist with a long span parallels a short span or a foundation end wall. Let s use this example and find a size of rafter that will work. For example l 360 span 360 for a 308 span is 19 of deflection. This post may contain affiliate links.

Yield strength of steel ksi e g. Patio roof maximum beam rafter spans. F stands for the beam s fiber strength in bending which depends on the species of wood. L 240 would be 11 29 and l 180 would be 29 of deflection.

W4 x 13w5 x 165x4x1 4 structural tubingw8 x 10w8 x 13w8 x 18w8 x 21w8 x 24w8 x 31w10 x 12w10 x 15w10 x 19w10 x 22w10 x 26w10 x 30w10 x 39w12 x 14w12 x 16w12 x 19w12 x 26w12 x 30w12 x 35w12 x 40w12 x 45w12 x 50w12 x 53w12 x 58w12 x 65w12 x 72w12 x 79w12 x 87w12 x 96w12 x. The total load is 4 000 pounds. For the initial calculation f can be estimated at 1 000. The lengths and sizes of joists vary depending on the species and quality of the lumber used.

On longer spans the beam may require much more bearing space as indicated by this table. Uniformly loaded simple beam. For example a 308 span with up to 19 of allow able live load. In the example the beam spans the 10 foot width of the roof.