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Decks and panels with or without an approved fill material may be designed as diaphragms in accordance with Diaphragm Design Manual of the Steel Deck Institute, provided other limitations in this code are complied with.
2222.4.1
Poured fill on roof and floor decks shall not be assumed to have any structural value to support or resist vertical or lateral loads or to provide stability or diaphragm action unless so designed, and poured fill and/or applied materials do not degrade when subjected to moisture.
2222.4.2
Positive attachment of sheets shall be provided to resist uplift forces. Attachment shall be as set forth in Section 2222.3.1 and as required by rational analysis, and/or tests, but not less frequently than the following maximum spacing:
  1. One fastener shall be placed near the corner of each sheet or at overlapping corners of sheets.
  2. Along each supporting member, the spacing of fasteners shall not exceed 8 inches (203 mm) on centers at ends of sheets or 12 inches (305 mm) on centers.
  3. The spacing of edge fasteners between panels, and between panels and supporting members, parallel to the direction of span, where continuous interlock is not otherwise provided shall be not more than 12 inches (305 mm) on centers.
  4. Fastening shall be by bolting, welding or other approved fastening device that provides a resistance to lateral movement as required by rational analysis or by test, but not less than 400 pounds per lineal foot (5838 N/m).
  5. Poured lightweight concrete fill will be acceptable as continuous interlock.
  6. Attachment to the supporting structure shall be provided at all perimeters and discontinuities by fasteners spaced at no more than 8 inches (203 mm) on center.
  7. Wall panels shall be attached as set forth in Section 2222.4.2(1), (2) and (3).
2222.4.3
Metal siding and roof panels shall be not less than 24 gauge.
Exception: Roof panels having an approved fill material designed to act as a diaphragm may use a lighter deck gauge provided that the product approval for the fill material allows its use over the same deck gauge, but in no case shall the deck be less than 26 gauge. The permit applicant shall provide the building official with signed and sealed structural calculations for the diaphragm design prepared by a licensed architect or engineer proficient in structural design. The diaphragm design shall comply with the applicable requirements of Chapter 16 and Chapter 22 (High-Velocity Hurricane Zones).
2222.4.4 Deflection
2222.4.4.1
Deflection of structural metal siding shall not exceed L/240.
2222.4.4.2
Deflection of structural metal roof panels shall not exceed L/180.
2222.4.5
The bending stress of metal siding and roof panels shall be designed using a safety factor of not less than 2.5.
2222.4.6
Minimum roof decking uplift loads shall comply with the design requirements of Chapter 16 (High-Velocity Hurricane Zones) utilizing rational analysis, but not less than UL 580 Class 90.
2222.4.7
2222.4.8
Metal siding and roof panels shall be designed, where possible, to be continuous over two or more spans.

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2222.4 Steel, Structural Sheets
with. Poured fill on roof and floor decks shall not be assumed to have any structural value to support or resist vertical or lateral ...
2222.4 Steel, Structural Sheets
with. Poured fill on roof and floor decks shall not be assumed to have any structural value to support or resist vertical or lateral ...
2222.4 Steel, Structural Sheets
with. Poured fill on roof and floor decks shall not be assumed to have any structural value to support or resist vertical or lateral ...