Roof Uplift Requirements

Decra roofs also have the resilience and durability to withstand the most challenging wind conditions even in florida s.

Roof uplift requirements.

Because fm approvals requires a 2 1 safety factor roofs with field of roof uplift forces of 30 pounds per square foot are the maximum for 1 60 ratings and 37 5 pounds per square foot are the maximum for 1 75 ratings etc. Wind uplift is a near constant force on roofs with wind movement from zero to over 170 mph. Another modification provided in the april 2009 fm 1 52 is to increase the allowable deflection for metal decks. Let s assume that the calculations for our building require a roof that can withstand 23 pounds per square foot of uplift force in the field of the roof.

To ensure a correctly built metal roof there are a variety of wind uplift tests manufacturers use to test their metal panel systems. These tests are necessary to understand how a metal roof system can withstand both external and internal pressures which is important when trying to meet design and performance requirements in projects. These roof deck types are steel minimum 22 gauge wood cementitious wood fiber plank and structural concrete minimum 2 500 psi. Wind uplift ratings are a critical safety metric for building and testing roof systems for superior wind performance.

Decra roofing profiles use a unique interlocking system high strength fasteners with documented pull out resistance and lab tested installation procedures to verify that our roofs provide wind uplift resistance far beyond the limits of conventional roofing materials.