1011 IRMA Roof Drain Applications
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1011 IRMA Roof Drain Applications
 FUNCTION: Used in roof systems where the insulated membrane assembly method of waterproofing is provided. Fig. 1011 is used where built-up felt and asphalt waterproofing is installed. A 4"(100) high perforated stainless steel gravel stop is supplied to retain the crushed gravel used in IRMA flat roof construction.
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