Roof Deck Deflection

The insurance fire rating or wind uplift requirements of a building may not allow a substitutionof fasteners or change inspacingasgoverned by design.

Roof deck deflection.

Roofdeck is a spreadsheet program written in ms excel for the purpose of analysis and design of roofs with steel deck. Other innovations include n 32 a 32 wide 3 deep roof deck panel and our new smooth series rivet attachment for our portfolio of cellular deck products. Allowable deflection is generally expressed as a fraction of the span in inches. Designer should check the deflection of the diaphragm.

All spans are to be considered center to center of supports. Standard structural decking patterns are 2 nominal tongued and grooved t g and 3 and 4 double t g products available with vee or eased edges to meet discriminating architectural requirements. The amount of flex depends on the magnitude of the load applied span of the member and stiffness of the member. Deflection is the bending or sag caused by loading.

Commentary the adequacy of deck edge support details should be revised. Specifically roof decks subjected to gravity loading dead live or snow and wind uplift loading can be analyzed using either asd or lrfd methods. First to the west coast market our new smooth series rivet attachment offers a. All structural members will deflect or flex under load.

Deflection of the deck shall not exceed l 240 under the uniformly distributed design live load. Structural decking also known as roof decking should not be confused with lumber intended for residential and non residential outdoor decks.