11.3 - Unpainted top flanges
From TGN Online
Where beams are to receive thru-deck welded shear studs, the top flanges are to be free from any type of paint, grease, loose rust or any other coating, as this prevents effective welding and will subsequently reduce the final weld strength.
Important Note: When masking the top flange before painting, the full top flange should be masked. Where a return of paint at the toes of the beam flange is required, this should extend no more than 15mm from the beam toe.
Refer to BCSA Code of Practice for Metal Decking and Stud Welding Publication No. 37/04 for more information
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