《建筑施工手册》(第二版)上册第1056页在《脚手架的设计和计算》一节中对脚手架大横杆的验算提出: “当在贴立杆处和相邻立杆的中间设置小横杆时,大横杆可按三跨连续梁计算,……”“另外,尚需验算大横杆与立杆的连接扣件的抗滑。该扣件受到的垂直作用力为:贴立杆的小横杆荷载P1和M1在扣件处引起的与P1同向的最大剪力0.65P1之和。扣件的抗滑能力为4903N(=500kgf)。则 1.65P1≤4903(单位:N,即500kgf)”此中有误。按上述大横杆按三跨连续梁计算时,荷载如图 “Building Construction Manual” (Second Edition), Volume 156, in the section “Design and Calculation of Scaffolding”, on the calculation of scaffolding large crossbars, states: “When setting up small in the middle of the pole and the adjacent pole When the crossbar is in use, the large crossbar can be calculated as a three-span continuous beam....“ ”In addition, the anti-slipping of the connecting fasteners of the large crossbar and the vertical rod is still required to be checked. The vertical force of the fastener is: The minimum crossbar loads P1 and M1 of the bar cause the sum of the maximum shear force of P1 at the fastener to be 0.65 P1, and the slip resistance of the fastener is 4903 N (=500 kgf), then 1.65 P1 ≤ 4903 (unit: N) 500kgf)" This is an error. According to the above three-span continuous beam calculation of the large bar, the load shown in Figure