Bolted steel staircase

Details Bolted steel staircase Bolted steel staircase

1989-04-28

1990-02-13

Chilcot, Jr., Richard E.

Static structures (e.g., buildings)

Stepped; e.g., stair

52188, 52191, 182 93, E04F 1100

Patent

active

048995045

ABSTRACT:
A bolted steel staircase is erected by placing side stringers spaced apart and attached to the upper and lower floors. A series of stair pans are placed on brackets, the brackets having been welded to the stringers in the fabrication location. The nuts are then hand-tightened on bolts which are welded to the brackets. A set of flat metal wedges, each having an angled slot, is driven between the vertical bolts and lances on the sides of the stair pans in order to align the stair pans and drive them against the stringers. After the wedges are driven, the nuts are fully tightened.

REFERENCES:
patent: 1064050 (1913-06-01), Brooks
patent: 1138642 (1915-05-01), Dowling et al.
patent: 1593418 (1926-07-01), Berson
patent: 1660392 (1928-02-01), Norberg
patent: 1676317 (1928-07-01), Bennett
patent: 1771405 (1930-07-01), Felsenthal
patent: 2105565 (1938-01-01), Von Schantz
patent: 2555002 (1951-05-01), Phillips et al.
patent: 3608256 (1971-09-01), Jeffery's
patent: 4034525 (1977-07-01), Yokomori

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