E - Fixed Constructions – 04 – C
Patent
E - Fixed Constructions
04
C
25/114, 72/98
E04C 3/26 (2006.01) B28B 19/00 (2006.01) B28B 23/06 (2006.01) E04B 5/29 (2006.01) E04C 3/294 (2006.01)
Patent
CA 1259813
ABSTRACT An improved composite, pre-stressed structural member and method of forming such a member of the type provided by upside down forming which includes connecting the steel beams of the composite member to the upper side of a mold so that a parallel deflection of the mold and beams occurs as the mold is filled with concrete. The improvement comprises utilizing a steel beam having a flange at or near the neutral axis with respect to a vertical deflection of the support member. After the composite structure is formed, the flange is away from the neutral axis with respect to a vertical deflection of the composite structure. This flange, therefore, significantly increases the section modu- lus of the composite structure while not adding signifi- cantly to the resistance to bending of the beam during pre-stressing. Stacked and welded I-beams are an example of a support in accordance with this invention.
491171
Keith & Grossman Leasing Company
Ridout & Maybee Llp
LandOfFree
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