Wedge tread stair box system
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United States of America Patent
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Apr 16, 2019
Grant Date -
Jan 31, 2019
app pub date -
Jul 27, 2017
filing date -
Jul 27, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A stair box system made of a stair box core, stringers, risers and treads. The inner surfaces of the stringers have a discontinuous series of mortises positioned to engage only with the treads. Each tread is beveled from the front to back surfaces and each of the riser is beveled from the top to the bottom surface. Each tread features one or more notches cut into its back surface and each riser includes a complementary hook cut into its bottom surface. The hooks on the risers engage the notches on the treads forming an open-faced channel. Removable covers fit over the treads of the stair box core. These covers protect the stair box core and/or they feature decorative building materials like hardwood or tile. The system allows the user to upgrade their stairs by replacing the covers with covers featuring a different finished surface.
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