Roof Truss Example Problems

Friday july 20 2018 prior to the mid 1960s a roof structure was framed at the homesite using dimensional lumber cut diagonally at the ends to size notched at the bearing points and then carefully secured along a ridge board or ridge beam at the center of the span.

Roof truss example problems.

Therefore trusses in general can be assumed to be 2 dimensional structures. Problem 407 cantilever truss method of joints. The skeletal structure of a roof system 18 0m long and 7 2m wide is as shown in figure below. To illustrate this a simple design example has been presented.

As a direct product of nature timber has so many variable properties that are more complex than that of concrete steel bricks or aluminium. Further in case weight of individual member is to be taken into consideration half of them are to be distributed at each of the pinned ends. Figure below shows a sample truss. The aim of this post is to show the design example of a timber roof truss trussed rafter.

The use of timber as trussed rafters for roof of buildings is a very popular alternative all over the world. Trusses are designed to support weight only in its plane. Problem 412 right triangular truss by method of joints. Problem 413 crane by method of joints.

The truss is made up of howe truss configuration spaced at 3m intervals. What are the most common problems with wood roof trusses. Problem 408 warren truss method of joints. Problem 409 howe roof truss method of joints.

It should take about fifteen to twenty minutes to complete. Trusses are used in bridges roofs and even bicycles and aircraft which shows how useful they are as stable structures.