3、注意事項 ， 為防止溝內水落口堵塞溢水而向內檐灌水、檐溝外邊的上口不宜高于內檐，如必須高于內檐溝，則在檐溝外邊設溢水孔。 高低跨內排水天溝與立墻交接處，用有變形能力的鍍鋅薄鐵板。
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.