{"product_id":"pemko-stc411apk36-36-3-x-1-3-8-automatic-door-bottom-mill-finish-aluminum-finish","title":"Pemko STC411APK36 36\" 3' x 1-3\/8\" Automatic Door Bottom Mill Finish Aluminum Finish","description":"\u003cp\u003eThe STC411APK36 automatic door bottom installs into the bottom rail of commercial doors to provide acoustic sealing and air leakage control. This 36-inch mortise-mount unit automatically drops a PemkoPrene seal bar when the door closes, creating an airtight perimeter seal at the threshold. \u003ca href=\"\/companies\/pemko\"\u003ePemko\u003c\/a\u003e designed this unit for hotels, office buildings, and other commercial spaces where sound transmission and energy efficiency matter.\u003c\/p\u003e\n\n\u003cp\u003eThe aluminum housing mortises fully into the door bottom, working on both right and left hand doors. The proprietary PemkoPrene seal material compresses against the floor to block air infiltration and reduce sound transmission between rooms. Mill finish aluminum provides corrosion resistance in high-traffic applications.\u003c\/p\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eAnodized Aluminum, PemkoPrene Seal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003ctd\u003e36 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDoor Thickness\u003c\/th\u003e\n\u003ctd\u003e1-3\/8 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eFull Mortise\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e5 Year Limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eThis door bottom meets UL 10C fire door assembly testing and UL 1784 air leakage standards. ANSI\/BHMA A156.22 certification confirms performance as a door gasketing system. ASTM E283 testing validates air infiltration resistance.\u003c\/p\u003e\n\n\u003cp\u003eFire door assemblies require annual inspection per NFPA 80 standards, covered in our \u003ca href=\"\/resources\/building-codes-standards\/fire-inspection-compliance\/ul-10c-fire-rated-doors\"\u003eUL 10C fire door testing guide\u003c\/a\u003e. For broader egress code context on commercial door requirements, see \u003ca href=\"\/resources\/building-codes-standards\/emergency-life-safety\/nfpa-101\"\u003eNFPA 101 Life Safety Code\u003c\/a\u003e reference materials.\u003c\/p\u003e","brand":"Pemko","offers":[{"title":"Each","offer_id":46754802303153,"sku":"STC411APK36","price":117.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0529\/5269\/4961\/files\/0_9da2e635-3f7b-4b39-802a-8abb263e2cb4.webp?v=1775807287","url":"https:\/\/shop.usmadesupply.com\/products\/pemko-stc411apk36-36-3-x-1-3-8-automatic-door-bottom-mill-finish-aluminum-finish","provider":"US Made Supply","version":"1.0","type":"link"}