Prior to the concrete being placed, the decking should be cleared by others of any debris, grease and/or dirt which could adversely affect the bond between the concrete and the decking. Typically, ceramic ferrules from the shear stud thru-deck welding process can be left distributed over the decking surface and lost within the concrete pour. Final clarification should be sought from the project structural engineer

Refer to Nelson Stud Welding – Application Information: Removal of Broken Ferrules - WTD (31/01/2006) for more information