| 摘要 |
<p>A returned tread for use on an open portion of a stairway having a stair tread constructed of wood and a return nosing joined on at least one side edge of the stair tread so as to form an exposed shaped or mitered joint on a forward side edge portion of the assembly. The surface of the nosing which opposes the stair tread and the side edge of the stair tread are joined along at least a part of their adjoining surfaces by tongue and groove construction. A single finishing nail, wood screw or other suitable fastener secures the nosing to the stair tread at a position just rearward of the exposed joint. as a result, the stair tread and nosing will not slide relative to one another at the position of the fastener or in a region next to the fastener that includes the exposed joint as the rest of the stair tread expands and contracts in width over a range due to ambient temperature and humidity changes. In the alternative, a suitable wood adhesive may be applied to the opposing surfaces of the nosing and stair tread in and along the exposed joint without using the fastener. Preferably, the nosing and stair tread are secured to one another by both gluing the opposing surfaces of the nosing and tread together along the exposed joint and by fastening the nosing and tread together with a suitable fastener as previously explained.</p> |
