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试验目的:弄懂脚手架设置斜撑(或称十字撑、剪刀撑)的作用。工具:扎钢筋的钢筋钩。材料:30～50厘米长的钢筋头6根,扎钢筋铅丝少许。步骤:(1)将4根钢筋扎成一正方形(图1)。(2)把方形钢筋直立在地面上,用一手指从左(或右)角作水平方向推力试验,如图2所示,将发现它在较小推力的作用下,即发生倾斜,说明侧向稳定性极差。
Purpose of the test: Understand the role of scaffolding with diagonal braces (or braces, scissor braces). Tools: Reinforced bar hooks. Materials: 6 steel heads 30 to 50 cm long, with a little steel wire. Steps: (1) Bind 4 reinforcing bars into a square (Fig. 1). (2) Place the square steel bar upright on the ground and use one finger to test the horizontal thrust from the left (or right) corner. As shown in Figure 2, it will be found that under a small thrust force, tilt occurs, indicating the side Very poor stability.