div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentols-fire-smoke-curtain-type-damper-designed-to-provide-2-and-4-hour-resistancehtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: OLS FIRE-SMOKE CURTAIN TYPE DAMPER Designed to provide 2- and 4-hour resistance with low air leakage and low resistance to air flowWe take a vety serious view of fire damper as a loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsusreader034viewer20220422115eb1acfdc1589d222e5ccf87html5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentols-fire-smoke-curtain-type-damper-designed-to-provide-2-and-4-hour-resistancehtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: OLS FIRE-SMOKE CURTAIN TYPE DAMPER Designed to provide 2- and 4-hour resistance with low air leakage and low resistance to air flowWe take a vety serious view of fire damper as a loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsusreader034viewer20220422115eb1acfdc1589d222e5ccf87html5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentols-fire-smoke-curtain-type-damper-designed-to-provide-2-and-4-hour-resistancehtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: OLS FIRE-SMOKE CURTAIN TYPE DAMPER Designed to provide 2- and 4-hour resistance with low air leakage and low resistance to air flowWe take a vety serious view of fire damper as a loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII=...