Primary Framing

Primary Built-up members:

High grade steel plate conforming to ASTM A572 grade 50 (or equivalent) with minimum yield strength of 34.5 kn/cm2 are jointed together on one or both side of the web by a continuous automatic sub-merged arc welding machine to produce required primary buit-up sections. Primary build-up members are painted with a minimum of 35microns (DFT) of red oxide primer or any other paint system as per customer's choice at the factory.