1. Scope
This Standard specifies the classification, code, plate profile and structure requirements, cross-section shape and size, technical requirements, quality inspection and tolerance, packaging, marking and quality certificate of various profiled steel sheet for building.
This Standard is applicable to roll-forming profiled steel sheet for building on the continuous-mode unit, including various shaping plate used for all parts of roof, wall face and floor cover.
2. Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this Standard. For dated reference, subsequent amendments (excluding content of corrigenda) to, or revisions of, any of these publications do not apply. However, Parties to agreements based on this Code are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 708 Dimension Shape Weight and Tolerance for Cold-rolled Steel Plates and Sheets
GB/T 709 Dimension, Shape, Weight and Tolerances for Hot-rolled Steel Plates and Sheets
GB/T 1766-1995 Paint and Varnish-Rating Schemes of Degradation of Coats
GB/T 1839 Test Method for Gravimetric Determination of Mass per Unit Area of Galvanized Coatings Steel Products (GB/T 1839-2003, ISO 1460; 1992, MOD)
GB/T 2518 Continuously Hot-dip Zinc-coated Steel Sheet and Strip
CB/T 12754 Prepainted Steel Sheet
CB/T 13448 Test Method for Prepainted Steel Sheet
GB/T 14978 Continuously Hot-dip Aluminum-Zinc Alloy Coated Steel Sheet and Strip
GB 50018 Technical Code of Cold-formed Thin-wall Steel Structures
GB 50205 Code for Acceptance of Construction Quality of Steel Structures
3. Ordering Content
Contract or order ordering in accordance with this Standard shall include the following contents:
a) The standard number;
b) Product name and classification;
c) Plating plate grades, hot-dip coating variety (zinc, aluminum, zinc, zinc-aluminum, and zinc-iron), coating weight, and plate thickness, material and performance requirements;
d) Color-coating structure, coating thickness and coating surface condition;
e) Finish coat variety and color;
f) Manner of packing;
g) Specification (product model, thickness and length);
h) Quantity;
i) Other additional requirements
