Rollbar For The WW2 Jeep

Above. The rollbar pipe is 2″ in diameter. The mounting plate is 5″x 3/8″ flat plate. The height is 29.5″ just under the canvas top, yet not out of proportion with the rest of the jeep if the top is off. A muffler shop useing a mandrel could not bend the top bar as sharp as desired so the designer used weldable 90 degree elbows on them. Some rollbars are created with the big looping bends on the top bar and the designer thought it would not look correct on a WW2 jeep. The Willys MB/Ford GPW jeep are built with a lot of angles, and the designer tried to carry that through the roll bar as well. Designer’s Comments: First I feel I must explain the reason for my roll bar. Two weeks before I got my jeep, a local guy was killed on a mountain road in his new 1942 jeep purchase. His new roll bar was sitting in his driveway. My wife said “You’re not driving that thing until it has a roll bar”. My design is more cosmetic than functional. I would probably survive the first roll. The third, fourth, and fifth revolution, I would be history. I know there arw stronger ways to build one, but I’m not into four wheeling. Chico is a collage town and I have added an extra brake light and only venture in there on weekends and evenings. I also used seat belts out of a 72 Chevelle. The roll bar is not much good if you fly out of the machine.
rollbar02 Above. Front view, looks good clean, almost as if it really belongs there.
rollbar03 Above. Rear view, clearly showing the lines of the rollbar. The angle braces were bent by a local muffler shop. They would not bend a roll bar, (liability) so the designer had to tell them it was a bicycle rack.
rollbar04 Above. Driver side view, this time show how the top bows will work with the rollbar. It’s important to make sure that the rollbar will not interfere with the operation of the top bows. Otherwise you may find that your top is no longer usuable or require modification of the rollbar.
rollbar05 Above. Close-up view of the rollbar joints described above. Notice the relatively sharp angles of the main rollbar.
rollbar06 Above. Close-up view of the rollbar details, looking from inside the vehicle out. Notice the mounting plates and the curves of the rollbar, designed in a manner to offer protection to the occupants but allow the toolboxes to continue to function.
rollbar07 Above. Close-up of the rear mount. There is just barely clearance between rollbar and the toolbox lid. There is only one bolt apparently holding the rear mount to the body, an optional extra bolt could be added by drilling the mount with a bolt opposite the one seen and welding the head in place then weld the rollbar to the mount. Underneath the mount a larger plate should be used to sandwich the body material. This is to help minimize the “punch through” effect on roll over as energy is directed toward the jeep body. The forces will be dissipated as it copes with the different size mount. Note: Not being a structural engineer this is strictly theory on my part.
rollbar08 Above. Close-up of one of the main rollbar mounts. Because this mounting plate is smaller then the one on top (or it could just as well be the other way around), it will minimize the “punch through” effect. This design requires two such mounting plates, this one and an upper mount. An optional, (though more difficult to make) plate would be to make one larger plate (still differing size from the main rollbar plate.)
rollbar09Above. Interior vehicle shot showing the main rollbar plate. It is approximately 5″ x 23″ x ⅜”” plate (dimensions are approximate-suite to fit) with a bend to fit around the inner fender.
  rollbar10 Above. Angled Interior vehicle shot showing the rollbar plates with sizes nominally indicated, suite to fit. Front plate is approximately 5″ x 23″ x ⅜” with a bend to fit around the inner fender and the rear plate is approximately 5″ x 2″ x ⅜”(dimensions are approximate-suite to fit). DISCLAIMER: Design of safety devices and enhancements should ONLY be done by proffessional engineers. The original designer and the author of these web pages accept NO responsibility or liability for YOUR implementation of this design. It is posted here strictly for INFORMATIONAL purposes. Neither the designer nor the author have any CONTROL over YOUR implementation of this device or any other “safety device”. Please use common sense and do not exceed your skills or attempt to do anything you otherwise would not do if a “safety device” were not installed. Be safe!