Steel Diaphragm Roof Decks

In its most basic form a diaphragm behaves as if it were a short deep beam.

Steel diaphragm roof decks.

Steel decking is used in many applications but is particularly well suited to roofing and flooring. In its most basic form a diaphragm behaves as if it were a short deep beam. 9 16 form decks and composite decks are available for floor decks. Steel roof and floor deck diaphragm design requires careful attention to load paths stiffness variations fastener types and regional preferences figure 1.

31 design manual for composite decks form decks and roof decks. Steel roof and floor deck diaphragm design requires careful attention to load paths stiffness variations fastener types and regional preferences figure 1. Following are the details you ll need about any of our products. It includes information for the design of steel deck diaphragms for roof and floor decks and complies with the requirements of the ansi aisi s310 2013 north american standard for the design of profiled steel diaphragm panels.

Deck types are described in the steel deck institute sdi publication no. 1 5 wide rib narrow rib intermediate rib and 3 deep rib deck profiles are available for roofs. The second edition of the sdi roof deck design manual rddm2 2020 by steel deck institute includes 15 design examples and 40 ksi load tables including new ones for concentrated and moving loads. Roof deck historically published diaphragm design tables for roof deck have been based on diaphragm shear loads only.

September 2015 the fourth edition of the sdi diaphragm design manual ddm04 replaces the third edition ddm03. Download the first edition of our steel deck on cold formed steel framing design manual sdcfsfdm or visit our order page to purchase a printed and bound copy. Roof diaphragm panels typically vary from 0 0295 inches to 0 064 inches in thickness and come in widths of 18 inches to 36 inches or more. Select the type of steel deck panel to calculate diaphragm shear strength tables.