The steel frame structure is a structure composed of steel materials and is one of the main types of building structures.

As a new material in structure, the polyurethane roof panel has been the most suitable choice for many users.

PU Sandwich Panels are composed of 3 layers, the external and internal is two dyed Galvanized or Aluminum corrugated plates, and core Polyurethane (PU) rigid foam.

Rock wool sandwich panel is applicable to project with fairly high demand upon fire protection . The rock wool fibers plum to the color steel sheet plates . high density strip rock wool crisscross with the length of the color steel plates .