Roof Truss Analysis And Design

The aim of this post is to show the design example of a timber roof truss trussed rafter.

Roof truss analysis and design. As a direct product of nature timber has so many variable properties that are more complex than that of concrete steel bricks or aluminium. All in all these truss analysis software are extremely easy to use and highly recommended for aspiring civil engineers to solve truss problems. Sres sanjivani college of engineering kopargaon. Wind load wl wind load are most critical loads in design and analysis of industrial roof truss.

Design of an industrial truss 24 6 20 120 elevation of the truss 2 30 60 column building plan total span of the truss 6 20 120 total height of the truss 24 spacing 30 pitch angle tan 1 24 60 21 80 dead loads. Sure there may be an instance where stick framing is your only option and that is understandable. It is desired to specify the appropriate angle sections that will safely carry the anticipated loading using eurocode design code specified steel grade s 275. An economy of an industrial building depends on the configuration of structure type of roof truss and portal frame utilized forces acting on building and selection of steel sections needed as per force employed.

Roofing 2 psf purlins 1 5 psf sagrods bracings 1 psf basic wind speed v 120 mph. The use of timber as trussed rafters for roof of buildings is a very popular alternative all over the world. 13 roof truss designs designs 1 3 residential roof trusses as shown in figure a are an engineered configuration of wood members placed to hold the weight of the roof s finishing materials the internal structure s ceiling and any snow load that may occur. It has a wide range of applications including being used as a wood truss calculator roof truss calculator roof rafter calculator scissor truss calculator or roof framing.

But 99 of the time a roof truss is going to give you so much more. It provides predefined shapes to design a complete truss structure and a detailed truss analysis report. Truss4 is also a considerably good free truss calculator. Trusses is one of my favorite truss design calculator and truss analysis software as it provides a wide range of tools to design and analyze trusses.

The idealised 2d model of the roof truss typical loading configuration is as shown below. Roof truss are designed for dead load live load wind load and their combinations as per indian standards. The pros of using roof trusses drastically outweigh the pros of stick framing. Example roof truss analysis 4 6 live load roof live load lr 20 psf r1 0 6 r1 1 0 r1 1 2 0 001 at at 25 ft x 10 ft panel x 8 panels 2000 sf r1 1 2 0 001 x 2000 sf 0 60 lr 20 psf x 0 6 12 psf plr int 12 psf x 25 ft x10 ft 3 00 k due roof live load plr.

Span of roof truss 7 2m.