[Engineering Version] Daily Question 20180601

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Which of the following statements regarding the basic requirements for the construction drawings of stair structures is incorrect? ( ) A. The floor plan of the stair structure should directly show the reinforcement details of the landing slabs. B. The construction drawings for a stair structure include its floor plan, sectional views, and detailed drawings of the individual components. C. The visible contour lines of a reinforced concrete stair are represented by thick solid lines, while the invisible contour lines are represented by thin dashed lines. D. When the scale of the sectional view of the stair structure is large, it is also possible to show the reinforcement details of the stair tread slabs directly on that sectional view. Answer: A 【Explanation】The construction drawings for a stair structure include its floor plan, sectional views, and detailed drawings of the individual components. When the scale of the stair structure plan is large, it is also possible to directly draw the reinforcement for the landing slabs. The visible contour lines of reinforced concrete stairs are represented by thin solid lines, while the invisible contour lines are represented by thin dashed lines. When the scale of the stair structure section is large, the reinforcement of the tread slab can also be shown directly on the stair structure section.