| 1. |
Rigid Insulation |
|
Insulation must be field coped at all backup plates (ridge, high side, and endlaps). This will allow the roof to float & prevent stress at endlaps. Rigid insulation thickness = 2” minimum and 4” maximum. Insulation not by Nucor. |
| 2. |
Liner Decking |
|
Liner decking is .6C 28 gage painted white, and is fabricated in accordance with SDI specifications and tolerances. Nucor does not offer warranties on liner decking. |
| 3. |
Clip Fastener |
|
Two (2) required per clip; the fastener must engage roof structural members. Self-drilling fastener without washer is utilized.
NOTE: Nucor recommends the liner decking and roof structural members to be pre-drilled for the clip fasteners to help avoid fastener drill point breakage. |
| 4. |
Deck Fastener |
|
Standard fasteners are self-drilling fasteners without washers. Puddle welds are an available option for joists only. Spacing shall be as follows unless specified differently be design:
12” o.c. at intermediate supports
6” o.c. at endlap-s
30” o.c. at sidelaps |
| 5. |
UL90 Rated System Member Spacing |
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Maximum purlin spacing shall be 5’-0”.
Maximum joist spacing shall be 5’-0”. |
| 6. |
Vapor Barrier |
|
Vapor barrier is required in all composite “CFR”™ applications to help avoid problems with condensation. Vapor barrier is not provided by Nucor Building Systems. |
