Rail

Details Rail Rail

1977-04-27

1979-05-15

Word, A. Hugo

Building units and construction elements

Structure

Simulative

D25 74, D25 77, D2501

Patent

active

D02518554

REFERENCES:
patent: 3228646 (1966-01-01), Hinrichs et al.
patent: 3534517 (1970-10-01), Kann
Sweet's Architectural Catalog File, 1976, section 5.11/B, p. R124, rail at center.

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