Where should I put the AC? Structural problem

[seismicfish]

So I bought an AC unit to put in my trailer. I originally was going to replace the central roof vent with it that is just slightly forward of the axles since there is already a 14" hole there. After ripping out the interior ceiling I noticed some patched holes aft of that vent. Climbed on the roof and see a shadow where a PO must have had one before.

So where should I put it?

I know the balance would be slightly better in the aft option. However there is a big difference in the rib spacing. (34" vs 46") The wider spacing would compromise the roof integrity with the weight of the ac unit hence placing it in the vent location would be better. What do I do? Below is a pic of the roof.

[HowieE]

My first thought would be to call Jackson Center and ask where it would have been place if a factory install.

If they can't answer the question I would try and find someone with that year unit.

The placement is critical with respect to support rather than balance.

Generally the roof is set up for an AC unit and if not installed a vent is there.

[seismicfish]

I am also worried that the aft option's hole will overlap one of the old patched holes.

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[Belegedhel]

I would put it where the previous owner removed the original AC and patched the holes. Yes, you have to cut a 14x14 hole for your new AC, but the wiring should be right there where you need it (and possibly even the condensate drain tube), and all of your structural and weight distribution concerns should be satisfied. You could strategically put your 14x14 hole to engulf one of the patches.

[cameront120]

Contact Jackson Centre, they'll tell you exactly where it goes. If it didn't come equipped with an air conditioner, it would have still been pre-wired for one and they'll tell you where you'll find the wire.

[perryg114]

The roof already looks caved in. I would investigate that as well.

Perry

[Silver Hawk]

When CampingWorld installed my new A/C they added wood bracing on all four sides of the opening, the ones going long wise went to the frames. They do it to all openings when replacing vents, A/V, etc. Worked really well and should have been done originally at Airstream - mkes the roof much stronger, especially around the A/C with very little added weight.

[seismicfish]

What do you recommend for the existing caves?

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[Silver Hawk]

I bought two (one small and one large) suction cup dent pullers off the internet. These worked great on dents and 'caves' or caveins. Did not work on dents caused by branches (dents with pointy bottoms) and such, where they can't get a perfect suction. I think you would have to get them from the inside.

Bought a screw type dent puller and plan to use it on the dents in the banana skirts, than bondo, than paint with truck bed stuff (Pep Boys) with roller to get textured surface. Should cover most 45 year old dents I can't get out.
Anyone try this? - how did it turn out?