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Old 09-01-2015, 06:50 AM   #15
2 Rivet Member
1963 22' Safari
Vail , Arizona
Join Date: Dec 2013
Posts: 23
Shell removal

I recommend two gantries. It will be easier to control the liftoff.

Also, as others have pointed out, the gantries are very useful for working on the trailer frame. I used them to hold the frame vertically to sandblast it prior to recoating it. Also handy for axle work -- flip the frame over and rest it on saw horses. Hoists good for removing/replacing axles.

On floor removal, I used a grinder to cut the bolts out on the floor side and then a punch to have them fall out the bottom.

On frame pattern, I retained the old floor as it was not too badly rotted. The curvature can be replicated from the old floor.

DO NOT use zip ties to attach the internal frame to the shell. They harden and break after a short while in the sun and weather. I used some of the rivet holes through which I passed screws. However I fashioned some wood blocks to use as "washers" to keep the screw heads from deforming the aluminum of the shell. I will try to describe this in words:
1. Attach some 2x4's along the bottom straight sections of the shell where the shell was attached to the trailer frame. This is where I used deck screws through the rivet holes.
2. Run some 2x4's across the bottom between the 2x4's that are attached to the sides of the shell. This will preserve the shell width where the the floor was installed.
3. Run some braces up from the side mounted 2x4's up to the beam along the roof. This forms a triangle in the cross-section of the shell to stiffen it top to bottom.
4. Run some braces in a triangle patter across the bottom where the floor was to give stiffness where the floor was installed.

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Old 09-01-2015, 09:43 AM   #16
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Belegedhel's Avatar
1973 21' Globetrotter
Houston , Texas
Join Date: Sep 2009
Posts: 1,902
Um...again, have a look at the following link:

It shows how the two gantries are used to lift a shell, as well as for frame work.

In the spirit of offering "professional" advice, within the above linked thread (toward the end) is some discussion about bracing, from a forums member who actually gets paid to do rennovations. His take, my experience, and many others' is that bracing is not needed when lifting the shell from above. This is the beauty of using the gantries--yes you will spend some time and money building them, but you will save time and money by not fussing with interior bracing to jack against.

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