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VV I "� "", . r <br />3 <br />The OPW 104-A-12" diameter Manhole has a 9" deep sheet metal skirt. Both body and heavy <br />ribbed cover are cast iron, designed to hold up under heavy traffic. <br />The OPW 306-A-12" square Manhole is constructed of galvanized sheet steel, with a channel - <br />reinforced, serrated steel cover. The 306-A is shipped unassembled for space -saving storage, <br />with all necessary hardware, and a centering plate for ease of installation. It has a 71/2" deep skirt. <br />The OPW 306 -AD -12" square Manhole is similar to the 306-A-12" above, except it has a 12" <br />deep skirt. <br />The OPW 306-B-12" x 24" rectangular Manhole consists of a heavy guage, galvanized steel <br />welded frame with integral anchoring flanges and a serrated steel cover. It is designed to accept two <br />riser pipes (liquid and vapor return). Installation requires the construction of a suitable concrete <br />form. <br />The OPW 306-R-12" round Manhole is constructed of galvanized sheet steel with a channel - <br />reinforced, serrated steel cover. The 306-R is shipped unassembled with all necessary hardware <br />for easy assembly. It has a 9" deep skirt. <br />IV <br />U <br />U <br />U <br />e, 11 <br />