... earthquakeproof, waterproof, energy conserving and environmental protection, etc. If you're really interested, please give us the following information: 1. Dimension ... Sandwich panel or steel sheet. 5. Crane beam: Do you need crane beam inside the steel structure? 6. Is there ... country where the structure is planning to use? 7. If you have other requirements, such as fireproof, isolatedroof, etc, ...