Detailed Product Description concrete column formwork aluminium formwork system Adjustable SF120 System for Rectangle / Square Concrete Column Description: 1. Structure sketch SF120-A is a kind of formwork for pouring rectangle & square column; it is composed of formwork, props, adjustable steel clamp, etc. Competitive Advantage: 1. High-precision production line guarantees the perfect products. 2. Special hollow steel frame covered with WISA-plywood, light weight but high strength. Its allowable pressure from fresh concrete is 80KN/m2 with the weight of 65KG/m2. 3. Easy connection with adjustable steel clamp. 4. The system is easy to change the cross section.