Fire escape – ladder – or scaffold – Wall- or floor-attached – Single pole or strand
Patent
1989-09-29
1991-01-01
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Wall- or floor-attached
Single pole or strand
182189, 182228, E06C 902
Patent
active
049811959
ABSTRACT:
An alternating tread ladder apparatus and an associated tread step bracket are disclosed. The apparatus comprises an elongated central tread support for mounting between a upper level and a lower level at some predetermined forward angle of inclination. The tread support is provided with a plurality of generally laterally oriented tread support apertures positioned therealong and extending therethrough. The preferred embodiment tread step brackets are comprised of angled Z-shape. The upper arm of the Z is longer than the lower arm, and entends through one of the apertures in the central tread support.
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"The Lapeyre Stair" Brochure.
"Lapeyre Stair" Brochure, 1988.
Popular Science "What's New--Home Improvement", Sep. 1988, vol. 233, No. 3, p. 98.
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