Roof Uplift Design

Minimum pressures for fortified correspond to vult 130 mph with exposure c.

Roof uplift design.

For mechanically attached single ply roofing systems the test involves building a roof assembly on a test frame that measures 12 feet by 24 feet. The specific test that pertains to wind uplift utilizes a test apparatus designed by fm approvals. The test frame has the appropriate roof deck attached to supports. Wind uplift design pressures provided are component and cladding c c asd pressures acting away from the roof surface per asce 7 10 figure 30 5 1 and 2015 irc table r301 2 2.

There are three tests ul 580 ul 1897and astm e1592 that are used to determine a metal roof s uplift rating. Uplift loads from the roof walls and other elements to the foundation and into the ground. It also describes wind uplift design of roof assemblies in accordance with asce 7 16 with several illustrative examples. Wind uplift ratings are a critical safety metric for building and testing roof systems for superior wind performance.

Illustrate how the load path resists wind uplift forces but a complete building design includes a consideration of numerous other forces on the load path including those from gravity loads and lateral loads. Several rating systems have been developed to measure the stability of various parts of a roof in high winds. Published august 1 2018 by whirlwind team. To ensure a correctly built metal roof there are a variety of wind uplift tests manufacturers use to test their metal panel systems.

Design wind loads are derived using the american society of civil engineers asce standard asce 7 minimum design loads for. The test frame has the appropriate roof deck attached to supports. Design and performance requirements. As the fourth edition of the rcif monograph.

Roof wind designer is intended to provide users with an easy to use means for determining roof systems design wind loads for many commonly encountered building types that are subject to building code compliance. The technical bulletin below explains the design considerations such as bottom flange bracing and uplift connections at bearing. The specific test that pertains to wind uplift utilizes a test apparatus designed by fm approvals. Wind uplift is a near constant force on roofs with wind movement from zero to over 170 mph.

In some cases wind loading can result in uplift loads on roof joists.