【Daily Question】【Civil Engineering Version 20180609】
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A folding staircase refers to ( ). A. Remove the landing beam at a specific section of the slab staircase. B. The stair tread is supported by the walls on both sides. C. The stair tread is supported by a wall on one side and hangs over on the other side. D. Remove the diagonal beam under the stair tread. Answer: A 【Explanation】Slab staircase: The stair treads are integrally cast with the landing beams at the upper and lower ends, with the landing beams bearing all the loads of the stair treads. At this point, the flight of stairs functions as an inclined cast-in-place concrete slab, with the platform beam serving as a support; sometimes, in order to ensure the clear height of the passage beneath the platform, the platform beam is omitted, and such stairs are known as folded-plate stairs.
C. The stair tread is supported against the wall on one side and overhangs on the other side
C. The stair tread is supported against the wall on one side and overhangs on the other side