Roof Beam Design

A structural ridge beam is a horizontal beam placed at the peak or ridge of a roof and is designed to carry much of the live and dead loads or weight of the roof structure by itself.

Roof beam design.

This calculator matches up with 90 of the applications in the 2012 international residential code book. Firstly begin the design by selecting depth and width of the beam then compute reinforcement area. Open source wood find tools designing with roof rafter span tables long span 35 lvl beam design roofdek manual structural roof deckingtimber steel framing manual single span ridge beamglulam ridge beam span. Most interior beams need to include the roof load.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. For a porch roof the beam needs to be sized according to the maximum snow loads in your area and you must know enough about the porch design to determine how the load will be distributed and over what distance the beam will carry the load. Ridge beam sizing is based on the span of the beam between supports and the amount of roof load supported by the beam. Floor beam span tables of residential structural design we will now look at roof rafter and beam design.

The design of concrete beam includes the estimation of cross section dimension and reinforcement area to resist applied loads. The design process starts at the roof and continues down to the foundation. The process involves one simple equation and some knowledge of the loads that the beam will carry. A roof is an integral part of a building and people try to personalise the roof designs to achieve optimum architectural splendour.

Poorly constructed roofs endanger the people living in a building so you need to make the roof compatible to the rest of the building in a well engineered style. Let s consider a basic gable wood roof framing design. A ridge board is a non structural member that serves as a prop for opposing rafters to rest against and connect to. The loads on the ridge beam are carried by vertical posts at the beam ends down through the building structural walls to the building foundation.

Here we have a wood framed gable roof. Continuing on from part 3. The colour and material of the roof complement the structural integrity of a building. Ridge beams are required by code if the roof slope is less than 3 in 12 irc section r802 3.

The structural design for gravity loads involves evaluating each member for performance under the anticipated live loads dead loads and a combined force of live load plus dead load often called the total load or tl. Design of rectangular reinforced concrete beam procedure. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial. There are two approaches for the design of beams.