Stairtread for spiral staircases

Details Stairtread for spiral staircases Stairtread for spiral staircases

E - Fixed Constructions

04

F

20/101

E04F 11/16 (2006.01) E04F 11/032 (2006.01)

Patent

CA 1146332

ABSTRACT OF THE DISCLOSURE A tread for a spiral staircase is disclosed. The tread has a frame consisting of a tubular sleeve, a pair of side frame members radiating outwardly from and secured to the sleeve, and an outer frame member secured to outer ends of the side frame members. A generally triangular perforated plate is secured to the side frame members, and the frame members and the perforated plate are encased in a covering of polyurethane foam. The covering means is provided on its upper surface with a recess for reception of carpeting or like covering material, and the underside of the covering means is provided with downwardly open pockets to receive edges of the carpet. The outer frame member is provided with at least one open- ing to receive a railing supporting rod and a bracket is provided in association with the opening to secure the rod therein.

371537

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