| 摘要 |
PURPOSE:To shorten construction period by timbering a steel staircase step form through the arrangement of reinforcing on a staircase site back form assembled between a staircase handrail of precast concrete panel and a circumferential wall, by placing concrete between the steel staircase step form and the staircase site back form, and by removing the form thereafter. CONSTITUTION:Upper and lower step parts 3a, 3b of a divergent staircase main body 3 are formed on the upper part of a staircase handrail precast concrete panel 2, and upper and lower handrail parts 2a, 2c, and upper and lower step side beams 2b, 2d are formed. Inserts 21... for supporting a reinforcement 31 of the step parts 3a, 3b of the main body 3, are arranged in two lines, while a pair of connection metallic materials 22... of a steel plate, are protruded on the upper end surface, and notches 23... and connection metallic materials 24... are provided on the lower end surface. The reinforcement 31 on a staircase site back form 5 is welded to the reinforcing bar preliminarily protruded from the circumferential wall, and steel staircase step forms 6, 7 are arranged, and are timbered by an angular pipe 9 and the like. The staircase can thus surely be integrated with the concrete panel 2. |
