The American National Stan- dards Institute (ANSI) is a non-proﬁt organization that administers and coordinates a voluntary standardization system.
SPRI, (Single Ply Rooﬁng Indus- try) is a non-proﬁt trade association representing the sheet membrane and component supplier to the commercial rooﬁng industry. SPRI is an ofﬁcial ANSI canvasser and has worked with representatives of the rooﬁng
industry to develop a number of consensus standards. SPRI offers a seminar on Perimeter Edge Wind Design (click for information)
The ANSI/SPRI ES-1 Standard is a reference for those who design, specify or install edge materials used with low slope rooﬁng systems. It addresses copings and horizontal roof edges. The following factors are considered when designing a roof edge. click here to learn more about ANSI-SPRI ES-1 standard.
•Structural Integrity of the Substrate (e.g. nailers)
•Wind Resistance of Edge Metal
Factors are used in ANSI/SPRI ES-1 to determine the loads on a roof edge
•Wind Speed (Use ANSI/SPRI ES-1Calculator)
•Location of the Edge Device on Roof
Tests Performed by Area-24 to Certify Products:
Tests the roof edge termination for mechanically attached and ballasted rooﬁng systems. The test evaluates
the perimeter attachment to ensure that
it meets a minimum holding power of 100 lbs. per ftt. The membrane is pulled at a 45 degree angle to the roof deck to simulate a billowing membrane. Failure is deﬁned as any event that allows the membrane to come free of the edge termination or the termination to come free.
A pull-off test for metal edge ﬂashing to evaluate the strength of the metal edge ﬂashing to ensure that the fascia system meets or exceeds the buildings calcu- lated design wind pressure. A load is applied to the fascia metal, simulating wind load on the fascia. The calculation used is: force at failure X face area = blow off resistance. The results must meet or exceed the calculated design wind pressure of the building.
A pull-off test for metal wall coping. It evaluates the strength of the metal coping cap to ensure that it meets or exceeds the building’s calculated design wind pressure. A load is applied to the coping cap, simulating wind load. Simultaneous up and out forces are used. The calculations used to determine the blow-off resistance for the top, face leg and back leg are: force at failure X surface area = blow-off
resistance. The results must meet or exceed the calculated design wind pressure of the building.
•ANSI SPRI ES-1 Quick Reference Guide
•Structural Design Standard Gutter Systems
•Wind Design Standard for Edge Systems Used with Low Slope Rooﬁng Systems