Harbor Freight ATV Ramp based roof rack
Hi,
I built this last Summer prior to spending a couple weeks onroad/offroad in CO. My truck serves many, many roles so I can't have something permanently mounted. In addition, I wanted something fairly light weight and of course, cost effective. Given I don't have a tubing bender and only a wire feed flux core welder, I'm also a bit cornered into something I can fasten together. On top of all that I don't have a ton of extra space to store it when I'm not using it so I wanted to try to make a fold-able rack. There are 5 members of TeamDoty so we ground camp - no rooftop tent for us! Here's what I did...
I settled upon "kit-bashing" 2 sets of Harbor Freight folding aluminum ATV ramps - these can be acquired with coupons for about $80:
http://www.harborfreight.com/super-wide-tri-fold-loading-ramp-90018.html
I combined these with some aluminum angle, some sheet aluminum, rivets, fasteners, etc. The base for the design is an older model TracRac ladder rack... the TracOne model - I picked this up used on CL for about $200:
https://www.etrailer.com/Ladder-Racks/TracRac/TA27000-01.html
I started by disassembling the steel bars/brackets at the end of the ramps that rest on the tailgate and since I needed 4 sections only of the 6 total I now had (2 ramp sets = 6 sections) I took apart some of them and put the hinges in locations so I could tri-fold it on itself. I sectioned the aluminum angle so the would nest with one another when folding. The front fairing was made with some angle along with the sheet aluminum. The plastic eyes on it were from the ladder rack and I use those to pass a tube through to help support a tarp-based awning.
The ladder rack has t-slots on the top surface so I made some t-bolts to slide in there and use them to bolt the rack down through holes I cut in the ramps.
I have a hard folding tonneau cover that can open up partially with this rack assembly installed. Under the rack and on the cover I tied down an auto rooftop soft bag for all our luggage... forward of that right behind the back glass I had 4x 7-gallon water containers (the cover can support about 300lbs.)
Here's a pic of it on the truck (with Cosmo getting in the shot!):
Close up of the fairing:
From behind the fairing a bit so you can see the angle I used (I put a spacer on the bolt on the centerline of the fairing to get it to have a sorta rounded shape):
Underside of rack so you can see the basic form, the side angle aluminum, etc.:
Top down view showing mounting holes in ramps + the relief cuts in the rear angle aluminum to facilitate folding:
Top down view of the outboard ramp showing how the angle was offset to facilitate folding:
Close up detail of the corners showing the riveted construction:
Here's a view showing one outboard portion folded up and the inboard sections being folded on to one another:
Here's a view showing it all folded up for storage:
A detail showing the rack folded up and how the slightly offset rear angle pieces nest with one another:
And like all good overlanders, here's a pic of my bottle opener by the tailgate
Over all I'm very pleased with the results. It was cost effective, easy to build with just rivets, drill, bits, jig saw, etc. It's fairly light weight, folds up and stores away nicely. Given the ladder rack is rated at 800lbs. and these ramps are rated at 1000lbs. it's very strong, stable and sturdy. My truck is a 3500 model so the over-roof weight wasn't even noticeable. I mainly carried extraction gear, and other odds and ends that I planned to not need frequently on our trip. It was a great way to get that stuff up and out of the way to leave room under the cover for items we would use on a daily basis during our trip.
(re-edited, Photobucket please stop killing links!)