Construction beam

Details Construction beam Construction beam

1980-07-09

1982-08-03

Word, A. Hugo

Building units and construction elements

Structure

Simulative

D25 77, D25 78, D2501

Patent

active

D02656884

REFERENCES:
patent: D229400 (1973-11-01), Ashley
patent: 2157233 (1939-05-01), Geib, Jr.
patent: 2371921 (1945-03-01), Tucker
patent: 3349535 (1967-10-01), Balinski
patent: 3381439 (1968-05-01), Thulin, Jr.
patent: 3461638 (1969-08-01), Balinski
patent: 3908328 (1975-09-01), Nelsson
patent: 4194336 (1980-03-01), Weinar

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