Roof Deck Deflection

All spans are to be considered center to center of supports.

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. All structural members will deflect or flex under load. Structural decking also known as roof decking should not be confused with lumber intended for residential and non residential outdoor decks. First to the west coast market our new smooth series rivet attachment offers a.

A metal roof deck diaphragm is a fairly flexible system somewhat analogous to a truss as shown in figure 2. Roofdeck is a spreadsheet program written in ms excel for the purpose of analysis and design of roofs with steel deck. Commentary the adequacy of deck edge support details should be revised. Bending stresses as well as deflections are checked.

Specifically roof decks subjected to gravity loading dead live or snow and wind uplift loading can be analyzed using either asd or lrfd methods. Allowable deflection is generally expressed as a fraction of the span in inches. Designer should check the deflection of the diaphragm. 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.

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. Deflection of the deck shall not exceed l 240 under the uniformly distributed design live load.