【Daily Question】【Civil Engineering Version 20180616】

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Which of the statements regarding the notation for cast-in-place concrete slab staircases is incorrect? ( ) A. The construction drawings for cast-in-place concrete slab staircases can be presented in two ways: planar notation and sectional notation. B. The distribution bars of the stair slabs are indicated using the letter F, followed by the specific values of those bars. C. The information included in the stair sectional drawings encompasses concentrated annotations for the stair slabs, numbering of stair beams and columns, horizontal and vertical dimensions of the stair slabs, structural elevations of different floors, and elevations between floors. D. Planar notation includes concentrated annotations and on-site annotations. E. For sectional notation, it is necessary to draw both plan views and sectional views of the staircase in the construction drawings; this notation method consists of planar notation, sectional notation, and on-site annotation. Answer: ADE 【Explanation】The construction drawings for cast-in-place concrete slab staircases can be presented in three ways: planar notation, sectional notation, and tabular notation. Planar notation methods include centralized annotation and peripheral annotation. For the distribution bars on the ladder steps, the specific value of the distribution bar is indicated with an ‘F’ at the beginning. The sectional notation method requires drawing the floor plan and sectional views of the staircase in the stair construction drawings; this notation method is divided into two parts: floor plan notation and sectional notation. The annotations in the staircase sectional view include the collective markings for the stair treads, the numbering of stair beams and columns, the horizontal and vertical dimensions of the stair treads, the structural elevation of each floor, and the structural elevation between floors.