Cargo Platform Storage Boxes
Recent models of Nucamp Boondock-optioned trailers come with a sturdy cargo platform on the front. While these platforms provide no weatherproof storage, adapting off-the-shelf commercial toolboxes described here can provide more than 5 cu. ft. of additional weatherproof storage space (with a box mounted on each side). These boxes, when installed as described below, extend almost exactly to the width of the trailer for good space utilization.
The box lid comes fitted with a waterproof seal and has a provision for a padlock. This method secures the boxes to the cargo platforms from underneath with carriage bolts, a design that prevents removal of a locked box using simple hand tools. However, the box material would not withstand prying or bashing by a determined thief. Steel plates described in the mounting method help reduce stress and fatigue on the box bottoms caused by vibration during use on rugged roads. The parts cost is about $75 per box.
The final installation is shown below:
Parts (per box):
Instructions (for one box):
This procedure allows the bottom of the box and cargo platform to be sandwiched between the two steel plates, one under the cargo platform and the other inside the box.
Invert the toolbox, and using an angle grinder, rasp, or chisel, remove the molded feet from the bottom of the box so that the surface is flat and smooth. See photo below.
Position the box upright on the cargo platform and push it in firm contact against the rear support rail and the propane bin. Working from underneath the platform, use a pencil to outline three of the platform circles on the bottom of the box. Choose two circles at the front of the platform and one in the middle. See diagram below. This configuration may give the best support against wind forces.
Hold one of the steel plates under the platform in the front-outboard position to cover the three holes traced in the previous step. If necessary, trim a corner for a better fit. Using a pencil from the top, trace the three circles to the plate.
Clamp the two steep plates together with the tracing visible on the top, and with a 5/16 in. bit, drill through both plates in the approximate center of one of the traced circles. Temporarily drop one of the carriage bolts through the hole to keep the two plates aligned, and drill a second hole near the center of one of the other circles. Drop another carriage bolt through the second hole, and then similarly drill a hole near the center of the third hole. Note: The exact placement of the holes within the circles is not critical, but the position of the holes relative to one another on the two steel plates must be precise; thus, inserting the bolts after each hole is drilled assures exact alignment. See photo below of the third hole being drilled through the two steel plates.
Invert the box and position one of the steel plates with the drilled holes over the traced circles on the bottom of the box. At this point, make sure that the orientation of all holes and plates are correct so that in the final construction, the assembly will sit properly on the platform with one steel plate underneath and the other inside the box on the bottom. Place one hole over the approximate center of a traced hole on the bottom of the box. Drill through the hole in the plate and into the box. Place a bolt through the hole to hold alignment. Repeat with another hole and drop in a bolt. Complete the process with the third hole. As with the above step, placing a bolt through the hole after drilling helps maintain the critical alignment between holes for the final assembly. See photo below showing the drilling of the third hole.
The carriage bolts have a square shoulder just below the head to keep it from twisting when tightening a nut. Unfortunately, the square shoulder will not fit through the round holes drilled for this project, and squaring a round hole in steel is difficult. But in this application, a hammer can be used to sink the shoulder into the steel plate without compromise. Support the bottom steel plate over the jaws of a vice that nearly close on the threads of the bolt, or alternatively, drill a hole in a piece of wood and place the hole in the plate over the hole in the wood. (The idea is to support the steel as much as possible to prevent bending, yet allow the bolt to slide through.) For each hole, drop the bolt through the hole so that the shoulder contacts the steel. Strike the head of the bolt with a hammer until the shoulder deforms the steel and the bolt head contacts the surface of the steel. See photos below. During this process, try to keep the bolt vertical so that it goes directly into the hole rather than an angle, which could affect the alignment described in the previous step. Perform this step for only the bottom steel plate.
Assemble the box on the platform by holding the bottom plate from underneath with the carriage bolts pointing up through the holes in the platform. See photo.
Place the box on the platform and push the bolts through the holes in the bottom of the box. It may be necessary to tap the bolts through the holes. See photo of inside the box.
Place the upper steel plate in the box and over the protruding bolts. Place a lock washer on each bolt and then secure with the nut. Push the box firmly against the platform rail at the back and the propane bin at the side. The circles in the platform should allow ample room for adjustment. Make sure there is enough room for the box lid to be lifted past the propane bin cover. (Optionally, you may choose, as I did, to notch the box lid where it contacts the bin cover, allowing an even tighter fit on the platform.) Once the final position has been established, tighten the nuts firmly to take out all slack between the layers. You may wish to place a piece of sturdy cardboard or plastic in the bottom of the box to prevent the nuts from damaging the contents.
Each box has a bracket on the back near the top that can be used to provide additional strength to the mount. Wrap a zip tie through the bracket and around the cargo platform’s back railing. On the passenger side, the bracket will not properly hold the zip tie in place, and the bracket will have to be removed and reversed. This requires some minor cutting of the bracket, and this modification should be done before the box is mounted to the platform.
The bright yellow DeWalt logo can be peeled away from the front of the box, which may make it less attractive to thieves.
A final note about durability:
I have no other experience with these DeWalt tool boxes regarding long-term resilience. Specifications state the box is made with “durable structural foam walls,” and the manufacture’s literature indicates some suitability for outdoor use. (The walls do not look at all like foam and are very rigid.) However, my main concern is degradation from long-term exposure to ultraviolet light. For this reason, I keep my boxes covered with plastic trash bags when the trailer is in outdoor storage. I cut the bottom from a Kroger 55 gallon trash bag, which fits nicely when inverted over the box. See photo below. Of course, these bags degrade within a few months, but they are easily replaced at very little cost.
Comments
How hve these held up since you installed them?
Towed by 2019 Ram 1500 Rebel 5.7L Hemi 4x4 Crew Cab
2018 320S Outback
https://www.youtube.com/watch?v=QlLpDGMaFW4&list=PL5nON2A4YgRXrOp7oG0NmlZ5xJNbEUbEN&index=8
He provides some very helpful hints for the install.
I got them a week after I ordered them and they came with 16 oversized washers for installation. These fit perfect on each side and fit within the platform base. Lids have gaskets for a tight fit and stainless steel piano hinges. These are very sturdy and the craftsmanship is superb. These were $400 for the pair and after my research on other options seem reasonable priced. They even sent me a 7" aluminum Tab sign.
(Alde: 3020; Refrig: Isotherm Cruise 65 Eleg; Battery: BB 100Ah LiFePo4; Solar: Renogy 100Ah Suitcase; Victron BMV-712; Pwr Cntr: PD-4135KW2B; EMS: PI-HW30C)
Greg & Marlene (Tucson, AZ)
2021 T@B Boondock CS-S
2018 Nissan Pathfinder
Ontario, Canada
it would probably need to move forward 1/2" to stay open without falling down. I don't see any reason why this would not work.
2023 Tab 400 / 2022 F150 XLT Sport 3.5EB
Traded in - 2018 T@B 320 S/2019 Toyota 4Runner SR5
2023 Tab 400 / 2022 F150 XLT Sport 3.5EB
Traded in - 2018 T@B 320 S/2019 Toyota 4Runner SR5
Towed by 2023 Ford F-150 "Frida"
New River, AZ
2021 T@B 320S Boondock “The T@B”
Towed by a white 2019 Ford F-150 4x4 Supercab, 3.5L V6 Ecoboost “The Truck”
2021 T@B 320S Boondock “The T@B”
Towed by a white 2019 Ford F-150 4x4 Supercab, 3.5L V6 Ecoboost “The Truck”
@ontheroad, I considered making them all the same height but the boss thought this looked better. Bradley’s is very accommodating and I’m sure adding a few inches to the height would not be a problem.
2020 320S Boondock Lite (silver w/blue)
2019 Subaru Ascent Premium
2021 T@B 320S Boondock “The T@B”
Towed by a white 2019 Ford F-150 4x4 Supercab, 3.5L V6 Ecoboost “The Truck”
2021 T@B Boondock CS-S
2018 Nissan Pathfinder
Ontario, Canada
2021 T@B 320S Boondock “The T@B”
Towed by a white 2019 Ford F-150 4x4 Supercab, 3.5L V6 Ecoboost “The Truck”
The hardware screw holes were tiny #4's, drilled out and substituted #6 stainless machine screws and nylock hex nuts. The machine screw and bolt holding the hasp may interfere with the lid overhang and prevent closure. I ground them down with a grinder. I seem to recall putting a sheetmetal backing plate behind the four lower bolts as well for a little more heft.
The lid overhang makes the hasps stand away from the locks, requiring making a pair of offset bends in the hasps so they are co-planar with the face of the box. Put the hasps in the vice and made two bends with a sheetmetalworking vice grip. (photo: front- modified; rear- unmodified.)
*Amazon- twist-knob keyed locking hasps, four pack keyed alike)
T&B 320S 2021 | Tacoma 4 cylinder tow.
2021 T@B 320S Boondock/ 2012 Tacoma 4 cylinder truck / 2023 Tacoma 6 cyl. truck