Every Alumbody tool box is fabricated from the same 5052 marine-grade aluminum as the bed and welded directly into the rail or chassis crossmember. No bolt-on brackets, no rattle, no rust, no leaks at a seam — and no third party to call when something doesn't fit.
Topsiders along the rails, underbody boxes beneath the deck, a crossbed up front, or a fully custom built-in for the way you actually work. We spec the box around the chassis, the trade and the bed — not the other way around.
Most fleet builds combine 2 or 3 box styles on one truck — topsiders for hand tools, underbodies to keep the deck clear, and a crossbed for long stock.
Mounted along the top rail of the bed
Long, low-profile boxes that run the length of the bed rail, sitting just above the deck. Easy to reach from the ground, lockable from outside the truck, and they don't steal any deck space underneath. Our most-installed box style.
Hung beneath the bed deck between the rails
Boxes mounted under the deck on the chassis frame — the entire deck stays open and flat. We typically run two boxes per side, sized to clear the wheel wells, fuel tank and exhaust on your specific chassis.
Spans the bed behind the cab
Full-width box behind the cab, against the headache rack. Common on pickups running long stock — pipe, conduit, lumber — because the box gives a clean front wall and a flat bed behind it. We can split the lid 50/50 for two-tech access.
Built into the bed structure itself
When a standard topsider or underbody won't fit the workflow, we build the storage into the bed framing — recessed tool wells, slide-out drawers, ladder tunnels, drum compartments. Drawn and welded one-off in our Orange shop.
Boxes are fabricated from the same 5052 aluminum as the bed and welded into the chassis or rail. Nothing rattles loose; nothing leaks at a bolt seam.
Every lid is fitted with a stainless steel paddle latch, keyed lock and weather gasket. Standard keying available on multi-truck fleet builds.
Continuous EPDM gasket and a positive-close stainless hinge keep rain, road spray and chemical mist out — tools stay dry through a Southern California winter or a freeway car-wash.
Add aluminum dividers, drop-in trays, drawer slides or rod-holders inside any box. Most builds get at least one tool tray and two compartments per box.
Chevy Colorado / Ford Ranger / Tacoma
Two topsider boxes 16" × 13" × 72" along the rails + ladder rack overhead + 16" fold-down rear gate + dock bumper.
Silverado 2500 / F-250 / Ram 2500
Two topsider boxes 24" × 24" × 36" + two underbody boxes 14" × 12" × 30" + crossbed front box for long stock + dock bumper.
F-550 DRW / Sprinter 3500 / Isuzu NPR
One large underbody 18" × 18" × 48" per side, deck left fully open for chips and debris, 38" lift-out stakes, rear dock bumper.
F-150 / GMC Sierra 1500 / Tundra
Two topsider boxes 18" × 18" × 60" + crossbed front box for rod & gas + 22" fold-down sides + 6 D-ring tie-downs.
The same alloy, the same welder, the same shop. We don't outsource tool boxes to a third party and bolt them on after the fact — they are fabricated alongside your bed in our Orange, CA facility, fitted to the chassis while the body is still on the jig.
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Yes — if the bed is sound. We typically retrofit underbody boxes on existing Alumbody beds in a couple of shop days. Adding topsiders to a third-party bed usually requires reinforcing the top rail first, which we inspect for during the estimate.
We measure your specific chassis before fabrication. Underbody boxes are always built to clear the OEM fuel tank, exhaust and spare-tire location — and to keep at least 9" of ground clearance under the lowest point.
Yes. Multi-truck fleets typically run a single key for every box on every truck — we set that up at the latch supplier before installation.
Stand-alone tool box add-ons to an existing Alumbody bed are usually 3–5 shop days. Full bed builds with integrated boxes run 4–6 weeks from drop-off to delivery.
We email firm quotes within 2 business days.
