... are ready for embracing a new future Composite board of the specifications of the:thickness: color plate thickness(mm)0.3-0. ... ,1150,1000,950,1130 roof board: 950,980 characteristics of the color composite sandwich plate :high strength,physical . corrosion ... warehouse ,apecial building,big span steel structure roofing ,metope of house and external decoration . it has light weight ,high strength ...