Special steel bottom plate of individual layer prepared roofing

The utility model provides an opposite side is equipped with female tongue -and -groove, and it is equipped with bellied crest to interlock on the plate body that special steel bottom plate of individual layer prepared roofing, it is including the plate body, and its characterized in that is equipped with sub - tongue -and -groove in one side of plate body, at the plate body and a trough that is recessed. Plate body material adoption yield strength is not less than 235MPa's galvanized steel sheet, and thickness is not less than 0.8mm. The effective width of plate body is 919mm, expandes width 1250mm, goes out the board rate and reaches 73.5%. The utility model discloses beneficial effect is: adopt reasonable board type, the wave height is moderate, and it is high that the board type goes out the board rate, energy -conserving raw and other materials, it is big that the face covers the width, and the piece number of required panel reduces relatively, has consequently practiced thrift time and cost in transportation and the installation, special design's sub - tongue -and -groove and female tongue -and -groove make overlap joint and installation prompt very fast, bear the weight of the dynamic height, permit the design span big, the quantity of purlin in the economy system, the crest width is big, and the opening is little, the installation of be convenient for insulation material and flexible waterproof coiled material, the self -tapping screw's that is used for fixing quantity has been saved to the great relatively pitch of waves than similar board type.