Detailed Product Description bridge deck formwork mivan aluminium formwork permanent formwork systems High Load Bearing Girder Box Formwork for Preformed Unit Description: 1. Brief introduction GB system-B is a kind of formwork especially for performed box girder in bridge floor construction. 2. Competitive advantage ①. Assembling is easier makes high construction efficiency. ②. Pouring object surface is smooth and beautiful. The formwork is made of steel material with higher load bearing capacity and stronger stiffness that makes perfect surface on concrete. ③.Good economic performance The cost will be greatly reduced by its long service life and more turnover times.