一幢约2000米~2的砖混住宅,地面以上重约4000吨。这么多的重物,都要通过建筑工人采用“吊、砌、灌,绑、钉、安”等方法,安放到设计的指定位置上。仅砌砖就要一块一块地砌50多万块,吊装要吊4000～10000件,大大小小的材料、成品、半成品都要进行运输。运输的用工量约占总用工量的20％～30％,也就是 A brick-concrete house of about 2,000 meters to 2 meters, weighing about 4000 tons above the ground. So many heavy objects must be placed at the designated location of the design by the construction workers using methods such as “hanging, laying, filling, tying, nailing, and security”. Only masonry bricks must be built more than 500,000 pieces one by one, and hoisting should be carried out with 4,000 to 10,000 pieces of materials. Large and small materials, finished products, and semi-finished products must be transported. The amount of labor for transportation accounts for about 20% to 30% of the total amount of labor, that is,