Waterstop steel plate (waterstop steel) refers to embedding a 300mm x 3m steel plate during the pouring of the lower concrete layer, with 10-15cm of the top exposed. During the next concrete pour, this exposed section of the steel plate is also integrated, serving to prevent external water pressure from seeping in. Hence, the waterstop steel plate demands good welding joints, with no leakage points to affect its waterproofing performance.

1. Strive to position the waterstop steel plate along the centerline of the wall.

2. The welding between the two steel plates must be full and double-sided, with the overlap not less than 20mm.

3. Wall corner treatment: 1. Full steel plate bending; 2. T-shaped welding; 3. 7-shaped welding.

4. Support welding for waterstop steel plates can be done by spot welding small rebars onto the main reinforcement.

5. When the waterstop steel plate passes through the column hoop reinforcement, the hoop reinforcement can be cut to form an open hoop, which is then welded onto the steel plate.

6. The "opening" of the waterstop steel plate faces the upstream side.