... Structure 1. Certificate:ISO9001:2000 2. High construction efficiency 3. Economic cost Steel Structure Product DescriptionProduct name: Steel Structure, Steel ... , double-span, Multi-span, single floor, double floors! 3) Base: Cement and steel foundation bolts 4) Column and ... , etc. 2. Doors and windows: Dimension, quantity, position. 3. Local climate: Wind speed, snow load, seismic magnitude etc. 4 ...