US 4,964,256 AGranted

Beam member for concrete forming system

AssigneeEconomy Forms Corporation

InventorRobert G. McCracken

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Abstract

A light-weight, high-strength beam member for use in concrete form assemblies. An end plate is secured by weldment to each end of a pair of channel members arranged in a back-to-back, spaced apart relation. The channel members includes a pair of transversely opposite leg sections with inturned terminal edges and an interconnecting web section. The terminal end portion of the web section is foreshortened by one-half the thickness of an end plate. In assembly, an end plate rests against the terminal edge of the web sections and is partially recessed in the leg sections and inturned edges of the channel members. Upon welding of the end plates to the channel members a high-strength end connection is created which permits full strength beam assemblies to be constructed by interconnecting end-to-end a plurality of individual beam members.

Claims9

Dependent claims

A method for fabricating a high-strength, light-weight beam from a sheet of metal material, comprising:

(a) forming from the sheet material a channel-shaped member having a pair of transversely opposite leg sections with inturned terminal edges and an interconnecting web section;
(b) providing a rectangular metal end plate for each end of the beam having a thickness greater than the thickness of the sheet material;
(c) foreshortening the terminal ends of said web section of said channel member by an amount substantially equal to about one-half the thickness of an end plate;
(d) positioning a pair of said channel members with the foreshortened web sections thereof in a back-to-back spaced relation to provide a rectangular plate receiving area, of a size and shape of an end plate, having the corners thereof defined by said inturned terminal edges of said leg sections;
(e) locating an end plate within a plate-receiving area against said foreshortened web sections at the terminal ends thereof;
and
(f) securing each end plate to a channel member by a weldment extended over the surfaces of said end plates exposed outwardly from beyond the leg sections of said channel members.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/461,352Filed 5 Jan 1990
Granted: 23 Oct 1990
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

B21D 47/01
Making rigid structural elements or units, e.g. honeycomb structures: beams or pillars
E04C 3/09
With apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders: at least partly of bent or otherwise deformed strip- or…
E04C 3/32
Columns; Pillars; Struts: of metal
E04G 11/50
Supporting structures for shutterings or frames for floors or roofs: girders, beams, or the like as supporting members for forms