Building Spec for Transporter

It depends on how evenly the load is distributed, and also on where you put the wheels. Putting them at about the 20% and 80% points, rather than the ends, will allow considerable reduction in tube size/weight.

http://cr4.globalspec.com/thread/83137

Work through this one!

Are you going to take out insurance? You will need it!

Is it welded or clamped/screwed frame work? If in doubt take more and smaller ID. Other than that any size will do dependent on your calculations.

Good luck!

Your post is so devoid of usable information as to be laughable, if it were not so sad.

Yes, yet another inquiry that lacks detail. I do not like to discourage people from asking questions, but,,,, this gives almost as much detail as the questions how, what or why!

If more detail was given, it could be an interesting exercise. It's always a challange to do something new.

I would drop your idea for a self powered vehicle and purchase a wheeled cart.

At maximum design load of 11,000 lbs, it could be moved by a small industrial tractor or forklift.

Something like this, but longer and more robust.

http://www.ktecinc.com/industrial_carts_flatdeck1501appl.html

45 - 48 feet is kind of long. Are you sure that no turns will be involved in the expected route of travel ?

What is being transported ?

There is just too little information here.

What load(s) are you transporting, how far, what standards does it have to meet, etc.

A first glance suggests you should be hiring the services of an engineering shop (or similar) to design and construct this thing for you, especially if this is to be used on a job site.

What's the load anyway?

You have given us the approximate dimensions of a flat back articulated trailer. Tow it with a standard tractor unit or an adapted fork truck. On the second hand market they are very cheap, especially if you don't need a one that is gong to be used on public highways. It would be much cheaper and quicker than anything you can build.

4" x 6" x 3/8" wall should be good.

How does the hydraulics lines have anything to do with the structure to support the load. If you plan to use tubing for the structure and use this tubing as the hydraulic line. You will find that it will take a lot of oil. Massey specs on a the tube at 45 feet will will hold all most 40 gals. Sound more like the reservoir then pressure lines.

It sounds as though you need a railway bolster wagon, but as you haven't said anything about the surface you want to cross, a hovercraft or a narrowboat would be equally applicable. You haven't said why you want to build it and why you can't either buy new, buy secondhand, or hire the equipment you need, so I'm off back to Blighty on the next transporter, even though I weigh only a tiny fraction of 11000lbs.

There really is no need to reinvent the wheel so to speak. You could simply use something like this float table.

http://www.airfloat.com/equipment/air-platforms/

For your safety and the safety of others have a professional do the work for you. 11,000 pounds is one heck of a load.

I have used similar units in the past and they function well and move with minimal effort. There are powered units with drive wheels as well. While I have not personally seen a float table as large as 48 feet I have used a few that where 20-30 feet with a capacity of 80,000 pounds. (Die mold transfer carts)