Method of manufacturing concrete beams

Details Method of manufacturing concrete beams Method of manufacturing concrete beams

1988-08-02

1990-06-19

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Forming plural articles

249125, 249131, 249176, 264334, B28B 710, B28B 724, B28B 728

Patent

active

049351869

ABSTRACT:
A method of simultaneously manufacturing a plurality of concrete beams having upper and lower flange parts which are separated by a web part and which extend over a whole length of the beams. The method includes the steps of providing a first form part constituting a bottom part including a plurality of elongate mutually spaced recesses where the recesses have a shape corresponding to the outer portion of the upper flange part of the beams and providing a plurality of elongate intermediate members having a plurality of projections extending from opposing sides thereof which are placed on the bottom part between the recesses such that the lines of contact between the intermediate members and the bottom part are displaced from the bottoms of the recesses. In this manner, when the concrete is poured into the chamber formed by the intermediate members and the bottom part, flash is not formed on the outer portion of the upper flange part of the beams formed by the first form part. Thus, the outer portion of the upper flange part of the concrete beam is smooth.

REFERENCES:
patent: 1235858 (1917-08-01), Tanner
patent: 1436033 (1922-11-01), Hahn
patent: 1437054 (1922-11-01), Hatch
patent: 1764134 (1930-06-01), Young
patent: 2270541 (1942-01-01), Martin
patent: 2883728 (1959-04-01), Sederlund
patent: 3977646 (1976-08-01), Moon et al.

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