arched beam
A beam whose upper surface is slightly curved.
beam
Glossary
Collar beam
Nominal 1- or 2-inch-thick members connecting opposite roof rafters. They serve to stiffen the roof structure.
Glossary
continuous beam
A beam which extends over three or more supports, joined together so that, for a given load on one span,
General
bowstring beam, bowstring girder, bowstring truss
A beam, girder, or truss having one curved member in the shape of a bow (often circular or parabolic in