Stairs Cutting

The project is about stairs renovation at the atrium area of a commercial and office complex in Guangzhou city. The original stair had to be removed for reconstruction. It had two landings that all came with a length of 1.5m. Total length of the stringer was up to 14.5m. Total width of the stair was 4.1m.

The new stair came with an addition of a four-storey elevator. Length was reduced to 8m and width to 2.75m. Total area was 176m2. To ensure original structure around the stair would not be damaged by vibration during demolition of old stair, we needed to reinforce it in advance and then conduct vibration free cutting by using concrete saws including hydraulic wall saws, hydraulic wire saws and floor saws

Construction Process:
1. Put support at the bottom of part to be removed, enforce waterproof and reinforcement treatment to surrounding structure;
2. Positioning and paying off the hoisting chain;
3. Reasonable partitioning;
4. Cutting and handling;
5. Transporting and cleaning