E - Fixed Constructions – 04 – F
Patent
E - Fixed Constructions
04
F
E04F 11/00 (2006.01) E04F 11/16 (2006.01)
Patent
CA 2064305
LB 145 491 896 Lambton-002 TITLE: SUPPORTED RETURNED STAIR TREAD WITH MOISTURE-COMPENSATING JOINT AND METHOD FOR MAKING SAME Abstract A returned stair tread for use on an open stairway or an open portion of a stairway is shown, which returned stair tread comprises: a stair tread constructed of wood and having at least one side edge fashioned to fit flush against an opposing surface of a return nosing to form an exposed joint between the stair tread and nosing along a forward end portion of the tread and nosing; a return nosing fitting flush against the side edge, the stair tread and nosing being slidably connected to one another by tongue and groove construction extending along at least an rear portion of the side edge rearward of the exposed joint; and, means for securing the nosing to the stair tread, in which the means comprises: rigid securing means joining the nosing to the LB 145 491 896 Lambton-002 stair tread only in the region containing the exposed joint which is located on a forward end portion of the tread forward of the slidably connected construction, which rigid securing means is adapted to prevent gaping or other deformation of the exposed joint as the stair tread expands or contracts in width over a range due to changing ambient temperature and humidity conditions; and, a non-rigid securing means joining said nosing to the stair tread along the length of their mutual juncture, which non-rigid securing means is adapted to secure the continued contact of the nosing and stair tread while permitting each to expand and contract in width over a range due to changing ambient temperature and humidity conditions. A method for the construction of such a returned stair tread is also shown.
Bellegarde Rene P.
Gowling Lafleur Henderson Llp
Lambton Manufacturing Ltd.
LandOfFree
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