I Beam Flat Roof

Timber to be covered these span tables do not apply to timber which is fully exposed to the elements.

I beam flat roof.

F stands for the beam s fiber strength in bending which depends on the species of wood. 2 end of beam fixed to a masonry wall. Fill in the parts of the formula that are already known. Continuing on from part 3.

Instead a wood i joist roof system is framed with either a central bearing wall or a structural ridge a beam that carries the roof load to posts. Let s consider a basic gable wood roof framing design. For the initial calculation f can be estimated at 1 000. Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads.

3 end of beam fixed to a column or a beam. The bottom half is carried by the exterior bearing walls. Flat roof with no permanent access and altitude not exceeding 100m 0 75 kn m udl 0 9 kn point load most areas exceeding 100m but not exceeding 200m excluding parts of scotland pennines north east england refer to bs 6399 3 1 kn m udl 0 9 kn point load. L stands for the span of the beam in feet.

Ends of beams can be laterally restrained using one of the following methods. Floor beam span tables of residential structural design we will now look at roof rafter and beam design. Beam supporting flat roof joists project number calcs for date ends of beam are to be laterally restrained. In the example the beam spans the 10 foot width of the roof.

Jun 3 2017 explore anthony valentine s board flat roof on pinterest. This beam shape has a wider profile for added horizontal strength making it ideal for sky scrapers or as a house beam along with bridge beams trailers platforms etc. See more ideas about flat roof steel structure steel house. Standard american beams aka junior beams or s beams have tapered flanges for added strength when your load is concentrated on the flanges such as machine bases hoists.

1 end of beam built into masonry wall. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths. Notches are not to exceed 0 125 of the depth of the joist and are to be located between 0 07 and 0 25 of the span from the support. Here we have a wood framed gable roof.

The load from the top half of the roof is carried by the bearing wall or structural ridge. These span tables apply only to flat roof and roof with a slope of up to 10 degrees.