... steel structure of sandwich panel 1. Item Name: steel structure warehouse/ workshop2. Steel Material: Q235B and Q345B3. Connection Type: bolted connection ... they have different thickness(50mm,75mm,100mm, 200mm), density, color, type, etc.b. Single color corrugated steel sheet( Steel Material: ... ( 0.3-0.7mm), color, type, etc.E. You can choose freely the material of door and windowsF. We also have ...