Composite Metal Decking
This information reflects our best understanding of product composition in 2015.
Composite metal decks are used in construction as concrete reinforcement and form. These decks are made from structural grade steel conforming to ASTM A1008 for primer coated or uncoated and ASTM A653 for galvanized coated steel. These coatings...
Composite metal decks are used in construction as concrete reinforcement and form. These decks are made from structural grade steel conforming to ASTM A1008 for primer coated or uncoated and ASTM A653 for galvanized coated steel. These coatings provide corrosion and rust resistance during construction. The standard galvanized coating is G60, but G90 may be used for high humidity and corrosive conditions and G30 or G40 may be used for greater economy. The base steel must meet have a yield strength of at least 33 ksi (SS grade 33), but may be available up to 80 ksi (SS grade 80). Steel decks are most commonly available in steel gauges of 16, 18, 20, or 22. This CP describes an 18 gauge composite metal decking made with 33 grade structural steel with a G60 galvanized coating.