- Roof deck sheets shall be attached as soon as possible after placement. All sheets placed shall be attached prior to the end of each work day. Arc welding is the most commonly used method for attaching Cordeck Steel Cellular Roof Deck to structural supports. Welder shall immediately follow the placement crew.
- All welds are to be made from the top of the deck down through the bottom flange of the ribs. Welds shall penetrate and attach all thicknesses of material to the structural supports.
- Caution shall be exercised on the selection of the electrodes to provide positive attachment and to prevent high amperage blow holes.
- Puddle welds shall be at least 5/8” diameter or elongated puddle welds with an equal perimeter. Fillet welds, when used, shall be at least 1” long.
- Cellular Roof Deck ends shall be welded to structural supports at 12” on center maximum and 18” on center maximum at intermediate supports or as indicated on erection drawings.
- Various mechanical fastening systems other than welding are recognized as viable anchoring methods provided they are reviewed, approved, or specified by the project designer. These include but are not limited to power-activated or pneumatically driven fasteners and screws.
- When spans exceed 5’-0”, side laps shall be fastened together at a maximum spacing of 36 inches on center or as indicated on erection drawings.
Attachment must be determined by the designer as part of the overall building design process. Values given in this document are adequate in most cases.