{"product_id":"able-sheet-metal-4fjr4-able-sheet-metal-4-galvanized-steel-fan-jack-regular-base-with-4-12-pitch","title":"Able Sheet Metal 4\" Galvanized Steel Fan Jack - Regular Base with 4\/12 Pitch","description":"\u003ch1\u003eAble Sheet Metal 4\" Galvanized Steel Fan Jack - Regular Base with 4\/12 Pitch\u003c\/h1\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eThis is a 4-inch galvanized steel fan jack, regular base with 4\/12 pitch, from Able Sheet Metal. Made from ASTM A653 steel and sold as one piece. The 4\/12 pitched base sits flush on steeper roofs and pairs with the matching fan jack top, sold separately.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features:\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4\/12 pitched base:\u003c\/strong\u003e Regular base formed to a 4\/12 roof pitch for a snug fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eASTM A653 steel:\u003c\/strong\u003e Galvanized steel meeting ASTM A653 for corrosion resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-inch opening:\u003c\/strong\u003e Sized for 4-inch exhaust duct applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid weight:\u003c\/strong\u003e Approximately 3.22 lb per piece.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle piece:\u003c\/strong\u003e Sold as one fan jack base per order.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch2\u003eSpecifications Table:\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAble Sheet Metal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4FJR4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSell unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 piece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAble Sheet Metal flashings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProfile \/ style\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFan jack, regular base, 4\/12 pitch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNominal size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFinish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGalvanized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplicable standards\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eASTM A653\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.22 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIntended use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRoof jack base for 4-in. exhaust fan ducting on 4\/12 pitch roofs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePack quantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 piece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch2\u003eFit and Compatibility:\u003c\/h2\u003e\u003cp\u003ePairs with the matching 4-inch fan jack top, sold separately. The 4\/12 pitched base fits roofs at or near a 4\/12 slope; for low-slope or other pitches, choose the corresponding base variant.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFrequently Asked Questions (FAQ):\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eQ: What roof pitch does it fit?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The base is formed for a 4\/12 pitch.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What duct size does it accept?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e It is sized for 4-inch duct.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: Is the top included?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e No, the fan jack top is sold separately.\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eQ: What material and standard?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Galvanized steel conforming to ASTM A653, weighing about 3.22 lb.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eExpert Verdict — Reviewed by the SuperArbor Pro Desk\u003c\/h2\u003e\u003cp\u003eMatch the base pitch to the roof slope so the flange sits flat and seals properly; a 4\/12 base on a flatter roof will leave gaps at the upslope edge. Integrate the flange into the shingle courses per manufacturer instructions and seal penetrations per local code, then finish with the matching 4-inch top.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eRoof installation requires fall protection and adherence to local building codes for penetration flashing.\u003c\/em\u003e\u003c\/p\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eOrder the Able Sheet Metal 4\" Galvanized Fan Jack with 4\/12 pitch base for pitched-roof exhaust venting.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Able Sheet Metal","offers":[{"title":"Default Title","offer_id":53529526370671,"sku":"4FJR4","price":49.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/610168_default_hero.jpg?v=1790350917","url":"https:\/\/superarbor.io\/products\/able-sheet-metal-4fjr4-able-sheet-metal-4-galvanized-steel-fan-jack-regular-base-with-4-12-pitch","provider":"Super Arbor","version":"1.0","type":"link"}