3、注意事项 ， 为防止沟内水落口堵塞溢水而向内檐灌水、檐沟外边的上口不宜高于内檐，如必须高于内檐沟，则在檐沟外边设溢水孔。 高低跨内排水天沟与立墙交接处，用有变形能力的镀锌薄铁板。
1. In the working conditions, the beaker should be installed first, and the height of the beaker should be 30mm lower than the leveling layer at the bottom of the gutter. The gap between the Water Falling Cup and the base is filled with 1:2:2 cement: Sand: fine stone concrete. 2, Gutter, gutter waterproof layer construction should be the gutter, Gutter grass-roots clean, there is rust to Polish out the original color of the steel plate. After cleaning, waterproof protection is done, one cloth and three coating waterproof treatment is carried out with metal roofing waterproof coating. After the waterproof coating is dried, water test is carried out. 3. Points to note: In order to prevent the overflow from being blocked by the water drop in the ditch, the water should be poured into the inner eaves. The outer top of the EAVES ditch should not be higher than the inner eaves. If it must be higher than the inner eaves ditch, the overflow hole should be set outside the eaves ditch. The junction of high and low span inner drainage gutter and Vertical Wall is made of galvanized iron sheet with deformability.