Also found in: Dictionary.
bowstring beam[′bō‚striŋ ‚bēm]
A steel, concrete, or timber beam or girder shaped in the form of a bow and string; the string resists the horizontal forces caused by loads on the arch.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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 shape) and a straight or cambered member which ties together the two ends of the bow.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.