Prestressed girder member
United States Patent 3140764
US Patent References:
/0230933.html
- - 0230933

/1085429.html
- - 1085429

Truss construction
- - 2514607

Fabricated joist
- - 2624430

Structural beam with fire extinguisher
- - 2809074


Inventors:
Cheskin, David B.
Publication Date:
07/14/1964
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Assignee:
Cheskin, David B.
Primary Class:
52/223.120
Other Classes:
52/645, 52/634, 52/693
International Classes:
E04C3/10; E04C3/04
US Patent References:
2846235Prestressed cast upper fifth wheel structure for articulated vehicles
2887762Method of making prestressed structural member
Foreign References:
BE539776A