Bow String Trusses

Used to span wide column free spaces it consists of an arched beam the bow joined at each end by a straight beam the string with diagonal support beams joining the two.

Bow string trusses. A bowstring truss is a structural device commonly used in bridge building and less often in industrial architecture. This is what an active job site. These diagonals result in a structure that more closely matches a parker truss or pratt truss than a true arch. 5 most common commercial bowstring truss manufacturers in california arch rib truss co.

All bowstring trusses are not created equal and do not share the same characteristics when found in a building and occupancy. Bowstring trusses structurally behave as a tied arch. Prior to 1960 it was one of the most common designs for large commercial and industrial. These forces are transferred to the bottom chord through the u shaped steel straps at the ends of the truss.

Modified howe truss fabricated for film studio in sylmar ca if you are not familiar with our company and your first contact with us is online. They may have the same shape but shape alone does not define the bowstring truss. Western wood structures chief engineer paul gilham talks onsite with us at north marion high school about post tensioning and upgrading of bowstring trusses. Bow string trusses sophisticated building constructions should appear safe and elegant.

The shape of the top chord parabolic results in generally uniform compressive stresses in top chord elements under uniform loads. The thrust forces at the ends of the top chord are resisted by the bottom chord which acts as a tie. Please let us know what your needs and questions are we will be more than happy to help. Multi member chord summerbell roof structures multi member mono chord vo vec roof structures multi member chord commercial roof structures multi member chord national truss company multi member chord easybow trusses by u.

We would be pleased to hear from you. In this truss all of the members except the upper chord are in tension and the strains in the bracing are comparatively slight thus making it a very economical truss for steel construction. The most common failure to bowstring trusses are. Asdo tendons enable higher loads to be safely transmitted through slender lower chords.

While similar in appearance to a tied arch bridge a bowstring truss has diagonal load bearing members. The bowstring truss bridge was patented in 1841 by squire whipple.