Steel Roof Diaphragm Design

The larger design shears may be resisted by using both heavier gage panels and fewer.

Steel roof diaphragm design.

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. The program is based on the steel deck institute sdi diaphragm design method and incorporates the latest icc es ac43 performance data. Steel roof and floor deck diaphragm design requires careful attention to load paths stiffness variations fastener types and regional preferences figure 1.

Or a concrete slab in. Generally there are two different types of diaphragms. Our new interactive deck tools provide the fastest way to generate your load tables and diaphragm designs for roof composite and form deck. The hilti profis df diaphragm software version 2 0 1 calculates diaphragm shear flexibility factors and uplift resistance for steel deck roof and floor systems.

The maximum average shear r b occurs at the ends of the roof diaphragm. Metal deck or composite metal deck in steel construction. 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. Results are output in a convenient downloadable pdf.

The diaphragm of a structure often does double duty as the floor system or roof system in a building or the deck of a bridge which simultaneously supports gravity loads. 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. Diaphragms are usually constructed of plywood or oriented strand board in timber construction.

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. In its most basic form a diaphragm behaves as if it were a short deep beam. Simply input your project data and our tool will customize your load tables or diaphragm designs from among more than 73 000 permutations.