{"product_id":"atb-m6000i-under-trailer-i-beam-box-mounting-kit-heavy-duty-steel","title":"ATB M6000I Under-Trailer I-Beam Box Mounting Kit, Heavy Duty Steel","description":"\u003cp\u003eThe ATB M6000I hangs a 24\"H x 24\"D x 72\"W box under a trailer from both sides of the I-beams. Steel hook plates bolt to the I-beams and carry cross beams that the box bolts to. The kit is .25 (1\/4 gauge) powder-coated steel with Grade 8 hardware, rated 500 lbs. (-2B) or 1000 lbs. (-3B) max.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eM6000I main mounting hook plates, main cross beams and bracket cross beams\u003c\/li\u003e\n\u003cli\u003eGrade 8 1\/2\" and 5\/16\" bolts, flat washers and lock nuts\u003c\/li\u003e\n\u003cli\u003eClosed-cell neoprene foam strip\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e1\/4\" Steel Brackets\u003c\/strong\u003e\u003cbr\u003eThe kit is built from .25 (1\/4 gauge) steel with predrilled holes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePowder Coated Finish\u003c\/strong\u003e\u003cbr\u003eATB powder coats the brackets with a baked-on finish.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUnder-Trailer I-Beam Mount\u003c\/strong\u003e\u003cbr\u003eHook plates hang from the trailer I-beams and carry cross beams, so the box mounts under the trailer from both sides.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSized for 72\" Wide Boxes\u003c\/strong\u003e\u003cbr\u003eATB lists it for a 24\"H x 24\"D x 72\"W box.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrade 8 Hardware\u003c\/strong\u003e\u003cbr\u003eATB's install sheet lists Grade 8 1\/2\" and 5\/16\" bolts, washers and lock nuts plus closed-cell neoprene foam.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLoad Ratings\u003c\/strong\u003e\u003cbr\u003eATB rates the M6000I-24-24-2B at 500 lbs. max and the M6000I-24-24-3B at 1000 lbs. max.\u003c\/p\u003e\n\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cdiv style=\"background:#faf7f7;border-left:4px solid #ba232a;border-radius:0 8px 8px 0;padding:14px 16px;margin:12px 0;\"\u003e\n\u003cp style=\"margin:0 0 6px;\"\u003eHow to choose: pick the -2B (500 lbs. max) or -3B (1000 lbs. max) by the loaded weight of the box.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 6px;\"\u003eFor a 72\" wide box, ATB sets the outside brackets about 70\" apart, so check the trailer I-beams give you that span.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cb\u003eFits:\u003c\/b\u003e Under-trailer I-beam mount for a 24\"H x 24\"D x 72\"W box\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eBrand:\u003c\/b\u003e ATB\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSeries:\u003c\/b\u003e M6000I\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eType:\u003c\/b\u003e Under-trailer I-beam box mounting kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial:\u003c\/b\u003e .25 (1\/4 gauge) steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFinish:\u003c\/b\u003e Powder coated\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMade in:\u003c\/b\u003e USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBox size:\u003c\/b\u003e 24\"H x 24\"D x 72\"W\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"pt-fitw pt-varspec\"\u003e\u003ctable\u003e\n\u003ccaption\u003eVersions\u003c\/caption\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePart #\u003c\/th\u003e\n\u003cth\u003eLoad rating\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr data-sku=\"M6000I-24-24-2B\"\u003e\n\u003ctd\u003eM6000I-24-24-2B\u003c\/td\u003e\n\u003ctd\u003e500 lbs. max\u003c\/td\u003e\n\u003ctd\u003eM6000I-24-24-2B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-sku=\"M6000I-24-24-3B\"\u003e\n\u003ctd\u003eM6000I-24-24-3B\u003c\/td\u003e\n\u003ctd\u003e1000 lbs. max\u003c\/td\u003e\n\u003ctd\u003eM6000I-24-24-3B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eWhat's involved:\u003c\/b\u003e Hook plates bolt to the trailer I-beams; you drill 1\/2\" holes through the I-beams and 5\/16\" holes through the box bottom. · \u003cb\u003eTools:\u003c\/b\u003e 1\/2\" drill bit; 5\/16\" drill bit; Touch-up paint\u003c\/p\u003e\n\u003cp\u003eHere's the short version. Follow ATB's install sheet (below) for your truck's exact positions and hardware.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eCheck all parts against the parts list and make sure there is room to mount the box.\u003c\/li\u003e\n\u003cli\u003eHang two main mount hook plates back to back on the trailer I-beam with two 1\/2\" center bolts, four flat washers and two lock nuts. Repeat until all six pairs hang loosely and can still slide. For a 72\" box, set the outside brackets about 70\" apart.\u003c\/li\u003e\n\u003cli\u003eBolt the main cross beams to the hook plates, then bolt the four bracket cross beams to the main cross beams.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSlide the kit to position and tighten all bolts installed so far to 65-70 ft-lbs.\u003c\/b\u003e Square the kit vertically and horizontally.\u003c\/li\u003e\n\u003cli\u003eUsing the top predrilled holes in the hook plates as a guide, drill through the trailer I-beam with a 1\/2\" bit (six holes) and paint inside each hole.\u003c\/li\u003e\n\u003cli\u003eInstall one 1\/2\" bolt, two flat washers and one lock nut per bracket and tighten to 65-70 ft-lbs.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eResources\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0805\/4784\/0244\/files\/atb-m6000i-installation-instructions.pdf?v=1793725753\" target=\"_blank\" rel=\"noopener\"\u003eATB ATB-M6000I installation sheet (PDF)\u003c\/a\u003e, ATB's own step-by-step guide.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eWarranty, Shipping \u0026amp; Returns\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty.\u003c\/strong\u003e ATB covers its standard truck boxes with a 60-month (5-year) limited warranty for the original purchaser; it is not transferable.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor a warranty claim, contact us with your order number and photos and we will work it through with ATB.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eShipping.\u003c\/strong\u003e Ships by freight from the ATB factory in Blanchard, ND; lift-gate delivery available.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAlaska, Hawaii and Canada: contact us for a freight quote before you order.\u003c\/li\u003e\n\u003cli\u003eWe email your tracking details as soon as it ships.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eInspect on delivery.\u003c\/strong\u003e Check the box when the freight arrives, before the driver leaves: look over the lids, doors, corners and welds for dents, scratches or shipping damage. Note any damage on the delivery receipt and send us photos. Check it as soon as it arrives.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLook for crushed ends, punctures or tears in the carton.\u003c\/li\u003e\n\u003cli\u003eIf something looks wrong, take photos of the box and the parts (and if a driver asks you to sign, note the damage on the receipt).\u003c\/li\u003e\n\u003cli\u003eOpen the box and check the parts against the parts list before you install.\u003c\/li\u003e\n\u003cli\u003eEmail \u003ca href=\"mailto:support@prestigetruck.com\"\u003esupport@prestigetruck.com\u003c\/a\u003e right away with your order number, a short note and photos. We send a replacement or a full refund at no cost to you.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e30-day returns.\u003c\/strong\u003e Return it within 30 days of delivery, unused, in the original packaging, with proof of purchase.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEmail \u003ca href=\"mailto:support@prestigetruck.com\"\u003esupport@prestigetruck.com\u003c\/a\u003e with your order number. We reply within 1-2 business days with instructions.\u003c\/li\u003e\n\u003cli\u003eDamaged, defective or wrong item: we send a prepaid label or arrange a pickup.\u003c\/li\u003e\n\u003cli\u003eChanged your mind: you pay return shipping. No restocking fee.\u003c\/li\u003e\n\u003cli\u003eRefunds go back to your original payment method within 7 business days of approval. See our \u003ca href=\"https:\/\/prestigetruck.com\/policies\/refund-policy\"\u003ereturns policy\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAbout ATB\u003c\/h3\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:24px;align-items:flex-start;margin:6px 0 4px;\"\u003e\n\u003cdiv style=\"flex:0 0 150px;max-width:150px;border:2px solid #14161a;padding:12px 8px;text-align:center;font:700 22px\/1 Rajdhani,'Arial Narrow',sans-serif;color:#b3121f;\"\u003eATB\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 340px;min-width:240px;\"\u003e\u003cp\u003eAmerican Truckboxes (ATB) builds aluminum and steel truck boxes, tanks and storage in Blanchard, North Dakota, and has done so for more than 25 years, by its own account. Its range covers pickup crossover, side-mount, chest and drawer boxes, service-truck boxes and packs, fuel tanks, and heavy-truck and trailer boxes.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#faf7f7;border-left:4px solid #b3121f;border-radius:0 8px 8px 0;padding:14px 16px;margin:16px 0 0;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eAuthorized ATB dealer.\u003c\/strong\u003e Prestige Truck is an authorized ATB dealer: every box on this page is built by ATB to the part number shown.\u003c\/p\u003e\u003c\/div\u003e","brand":"American Truckboxes","offers":[{"title":"500 lbs. max","offer_id":68033866760436,"sku":"M6000I-24-24-2B","price":1092.0,"currency_code":"USD","in_stock":true},{"title":"1000 lbs. max","offer_id":68033866793204,"sku":"M6000I-24-24-3B","price":1637.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0805\/4784\/0244\/files\/atb-tb39218-tb-product-37174.jpg?v=1793728238","url":"https:\/\/prestigetruck.com\/products\/atb-m6000i-under-trailer-i-beam-box-mounting-kit-heavy-duty-steel","provider":"Prestige Truck","version":"1.0","type":"link"}