This document is the 18" - 30" Round Grate/Cover Extension Ring Quick Spec Installation Nyloplast Detail. It shows the illustrations with chart and notes.

The illustrations show the ductile iron Grate/Cover, ductile iron grate riser extension. Asphalt resurfacing, asphalt above concrete slab and integrated ductile iron frame to match basin. A chart details frame size, extension height and part number.

Notes detail that dimensions are in inches. Grates/solid covers shall be ductile iron per ASTM A536 grade 70-50-05. Frames shall be ductile iron per ASTM A536 grade 70-50-05. Grate riser extensions shall be ductile iron per ASTM A536 grade 70-50-05.