840 steel tile drainage because of good performance, it is commonly used roof material. 840 finished steel tile is easy to install, lightweight and efficient. Closed systems also filled bubble molecular structure can prevent moisture condensation. Forming the outer layer of steel full account of the structure and strength requirements, taking into account aesthetics, flat inner surface layer molded to fit a variety of needs. Color plates by roll forming, although thin but high-strength steel, more suitable for use in coastal areas. The light weight steel tile :10-14 kg / m, equivalent to a brick wall, 1/30, the thermal conductivity: λ <= 0.041w/mk. High intensity: for smallpox envelope bearing plates, bending compression; generally houses without pillars. Bright color: no surface decoration, color galvanized steel coating retention in 10-15 years. Flexible installation fast: the construction period can be shortened by more than 40%. Oxygen Index: (OI) 32.0 (provincial fire product quality inspection stations). 840 Color Waki ??this parameter: [Model] 840 [Material] etc. painted roll / color coated 0.3mm ~ 0.8mm [thickness]] [the effective width 1000mm] [compressive flexural compressive