Glossary

Pratt truss



A truss made from panels, in which the members form the letter "N". This is a popular truss, and there are plenty about, in both timber and steel. At the nodes, the members may be pinned to permit free movement to accomodate thermal stress and deformation due to loads generally. The upper horizontal members are usually struts, and the lower ones ties, and may be of different section.


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