Cold form steel: As per the NYC DOB Code section 1704.3.1.2 cold-formed steel floor and roof decks shall be in accordance with AWS D1.3.
As per Wikipedia, Cold-formed steel (CFS) is the common term for steel products shaped by cold-working processes carried out near room temperature, such as rolling, pressing, stamping, bending, etc. Stock bars and sheets of cold-rolled steel (CRS) are commonly used in all areas of manufacturing. The terms are opposed to hot-formed steel and hot-rolled steel.
Cold-formed steel, especially in the form of thin gauge sheets, is commonly used in the construction industry for structural or non-structural items such as columns, beams, joists, studs, floor decking, built-up sections and other components. Such uses have become more and more popular in the US since their standardization in 1946.
Cold form steel framing application in building industry
Cold form steel framing is commonly used in the building industry. Due to higher tensile strength and lighter in weight compared to the regular structural steel members, Cold form steel found a position in the construction industry. Cold form steel comes in a lot many sizes and shapes.
In high-rise commercial and multi-family residential buildings, Cold form steel is occasionally used for interior partitions and support of exterior walls and cladding. In many mid-rise and low-rise applications, the entire structural system can be framed with Cold form steel.