0 Introduction

After complying with all minimum requirements specified, the product shall be assigned a Performance Grade in multiple increments of 240 Pa (5 psf), as specified in Tables 6.1, 7.1, 8.1, 8.2 and 8.3. Optional Performance Grades (PG) shall not exceed the applicable Performance Grades (PG) limit specified in Tables 6.1, 7.1, 8.1, 8.2 and 8.3. ................
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