Is there a holy grail thread for shortening lwb to swb frame

[mrhino]

I agree with TX firefighter 100%. I researched and researched the "best way" and like you I came up with three different "best ways". I happen to live in the RV capitol of the world and I made it a point to look at many frames and chassis everything from class A's to big rigs extended for sleepers. Everyone I saw was straight cut and plated. If its good enough for them!

I straight cut mine. welded on a diamond plate on the inside of the frame. Then took the section I cut out, and made a outside support that I bolted on. bracing the side, top and bottom. Plus I made it where the fuel tank brackets bolt to either side of my splice. Im no engineer but Im confident It aint going anywhere.

[rs74]

I am thinking of doing this splice here. Do these measurements look right. To me it looks like you are actually moving it 20".

[mrhino]

14" out of the front. thats a fact! How far from the cab never really concerned me. I just made sure I stayed with in the front bed bolt holes, once you get the bed off it will be pretty easy to see where you should remove those 14" The rear is not the same for everybody. I was cutting a 1 ton and only need to take of about 4". If memory serves me correct i could have taken as much as 5.5 or as little as 3.5. I believe the 1/2 ton frames are different. Do you already have the bed? if so just measure your last bed bolt hole back and transfer that number to the frame rail. Its really simple and easy to over think it.

[mrhino]

to answer you question. no your drawing doesnt look right. the frame is shortened 20" total 14" in the front. Find where you want to remove those 14". draw a line down the middle of that. That would be 7" either side. then make your Zcut 7" both ways.

[rs74]

I didn't think that looked right. I copied it off another thread here someone elses drawing. Thanks for the info.