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<br />78 <br /> <br />CLOSURES FOR HORIZONTAL OPENINGS BELOW RFD <br /> <br />NEOPRENE GASKET OR EQUIVALENT <br />ALUMINUM FLOOD SHIELD <br /> <br />"';6.: <br />". ~~;..; <br /> <br /> <br />~';. <br />THAEA.~~~r- J <br />ANCHORAGE <br /> <br />L STIFFENERS <br />OPENING~ <br /> <br />I.) <br /> <br />-, <br />( , <br />~'; .-~'~' "","" '''~}' <br /> <br />I"~ <br /> <br />CAST IRON FRAME & COVER <br />FOR SQUARE, RECTANGULAR <br />OR Cl RCULAR OPENINGS <br /> <br />~f'.(';"~CC'- <br />~--' -~ ~-'~:~ : <br />.",i, <br /> <br />IbJ <br />T.BOl T OR OTHER QUICK <br />DISCONNECT FASTENER <br /> <br /> <br />DETAIL <br /> <br />~, <br /> <br />'.-< <br /> <br />Figure 8.11. Shields for vents and shafts. (Reference 40) <br /> <br /> <br />Figure 8.12. Flood shield for air vent manual placement prior <br />to flooding. (Reference 33) <br />