Steel Roof Diaphragm Design

Steel roof and floor deck diaphragm design requires careful attention to load paths stiffness variations fastener types and regional preferences figure 1.

Steel roof diaphragm design.

The larger design shears may be resisted by using both heavier gage panels and fewer. Diaphragm design diaphragm design information for vulcraft roof and floor decks is based on the steel deck institute diaphragm design manual third edition ddm03 in accordance with the 2015 ibc. Our new interactive deck tools provide the fastest way to generate your load tables and diaphragm designs for roof composite and form deck. Simply input your project data and our tool will customize your load tables or diaphragm designs from among more than 73 000 permutations.

Vulcraft roof deck design tools 2018 ibc deck diaphragm calculate your unfilled deck diaphragm shear and stiffness for your exact condition based on the american iron and steel institute aisi s310 16. Just as the floor or roof is checked for vertical load capacity it is considered a diaphragm in the plane of the floor and check for shear when designing the lateral force resisting system. Steel roof and floor deck diaphragm design requires careful attention to load paths stiffness variations fastener types and regional preferences figure 1. 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.

Metal deck or composite metal deck in steel construction. The program is based on the steel deck institute sdi diaphragm design method and incorporates the latest icc es ac43 performance data. Diaphragms are usually constructed of plywood or oriented strand board in timber construction. Roof deck historically published diaphragm design tables for roof deck have been based on diaphragm shear loads only.

Results are output in a convenient downloadable pdf. Generally there are two different types of diaphragms. Or a concrete slab in. In its most basic form a diaphragm behaves as if it were a short deep beam.

Zones near the mid span of the roof are subjected to less unit shear therefore less diaphragm strength is required. The maximum average shear r b occurs at the ends of the roof diaphragm. In its most basic form a diaphragm behaves as if it were a short deep beam.