ANSI/SDI-RD1.0 Standard for Steel Deck roof1

Material:

A. Sheet steel for galvanized deck shall conform to ASTM A653 (A653M) Structural Quality, with

a minimum yield strength of 33 ksi (230 MPa).

B. Sheet steel for cold rolled plus painted deck shall conform to ASTM A1008 (A1008M) with a

minimum yield strength of 33 ksi (230 MPa). Other structural sheet steels or high strength low

alloy steels are acceptable, and shall be selected from the North American Specification

for the Design of Cold-Formed Steel Structural Members.

C. Sheet steel for accessories shall conform to ASTM A653 (A653M) Structural Quality for structural accessories, ASTM A653 (A653M) Commercial Quality for non-structural accessories, or ASTM A1008 (A1008M) for either structural or non-structural accessories. Other structural

sheet steels or high strength low alloy steels are acceptable, and shall be selected from the North American Specification for the Design of Cold-Formed Steel Structural Members.

D. The deck type (profile) and thickness (gage) shall be as shown on the plans.

Finish:

A. Galvanizing shall conform to ASTM A653 (A653M).

B. Painted with a shop coat of primer shall be applied to steel sheet conforming to ASTM A1008

(A1008M).

C. The finish of the steel roof deck shall be suitable for the environment of the structure.

Commentary: The primer coat is intended to protect the steel for only a short period of

exposure in ordinary atmospheric conditions and shall be considered an impermanent and

provisional coating. Field painting of prime painted deck is recommended especially

where the deck is exposed. (See SDI Field Painting of Steel Deck). In corrosive or high moisture

atmospheres, a galvanized finish is desirable in a G60 (Z180) or G90 (Z275) coating. In highly

corrosive or chemical atmospheres or where reactive materials could be in contact with the steel deck, special care in specifying the finish should be used.