newer truck frames are heat treated steel (to make them lighter and stronger) and should never be welded on. use your head and make clever brackets/mounts and just drill holes and bolt whatever you need to to them. You will find that even drilling them will be a chore because of the hardness and alloying elements that were added to them to make them heat treatable (chrome, molly etc). Look at them, do you see a weld anywhere on them, they are all bolted and rivetted together, no welding allowed or you will have a crack later on, then how do you fix it? sporty rick
This feels like the safest route to go and all of the welding/fabrication can be done on the bench in the shop. Plus, bolted on brackets/mounts provide an measure of flexibility in the event of future design/component changes. Thanks for the input!!!
1985 International 28 Passenger
6.9L Diesel/Allison AT-545
From memory, and 24 years of noodling around with 18-wheelers; I think you will
find that the label that says "Do not drill holes..." goes on to say "...in the frame flanges". That is, the top and bottom horizontal parts of the frame rail.
It should be fine to drill holes in the "web" of the frame -- that is, the vertical part.
That's how we mount equipment on the 18-wheelers. Fabricate on the bench;
bolt to the frame web.
An other way to mount stuff to the frame is to use U bolts around the frame rail.
Good luck with your project!
An other way to mount stuff to the frame is to use U bolts around the frame rail
I'm glad you posted that! I had been looking for a way to mount someting to the bottom of my frame without having to drill holes... The thought of U-bolts never even crossed my mind....and it is the perfect answer for my needs. Thanks for the idea!!
You just might be a Redneck if...
...your motor home used to be a school bus!
...Your living room has a steering wheel!
...Your home has brake lights
1994 Jeep Grand Cherokee
1989 Thomas Diesel Pusher (Cat 3208/Freightliner)
the sticker says do not weld or drill frame rail flanges if my memory is not totally gone. To drill the verticle part of a framerail you can rent a magnetic base drill (magdrill) or wrap a chain around the rail and have a helper use a lever to apply pressure to the back of the drill while you control the angle and speed, perpindicular and slow. also it helps to drill a pilot hole, I use 1/8 or 3/16 bits buy nthem in 10 pack bulk packs, they are consumable shop msupplies like sand paper.