Adding extra A/C to Itasca roof.

[Street1954]

I understand the roof construction on the Itasca is a "sandwich" design, luan plywood, rigid foam, fiberglass type matrial roof. So, there are no "structural" supports spanning the roof.
Has anyone added an a/c unit to the rear portion of their Itasca MH? I'm thinking of removing a centered light fixture and cutting the required hole for a new a/c. I plan on concealing the power wire in a "wiremold" type moulding down under the bed and out to the 20 amp pedestal plug. I'm not going to tie this unit into the coach, it will only be used at the campsite.
Does anyone see a problem with this?

 

[Kevin D Pem]

I like the hands on approach.

I would remove a vent flashing inside and study the construction before I took anyone's opinion/word for it.

 

[Underboss]

Can you add two structural members side to side

 

[Street1954]

I like the hands on approach.

I would remove a vent flashing inside and study the construction before I took anyone's opinion/word for it.

Excellent thought, Thank you!

 

[Street1954]

Can you add two structural members side to side

No, they would interfere with the bedroom slide.

 

[d23haynes57]

I will add some electrical considerations. When you pull up to a park power post and you see up to 3 receptacles, those are not 2 x 50, plus 1 x 30 plus 1 x 15 or 20 amps. That would require each post to have an 80 amp service. The 30 and the 20 come from one side each of the 50. If there is only a 30 and a 15-20 amp receptacle, the 30 will still be total available. No value running another circuit for the added AC.
No for the reason not to even consider it. While The connection to the pole is a "temporary" connection, as it enters the RV, considered a dwelling it becomes a service entrance feeder. As such it has to follow all the code requirements for grounding and over current protection. Basically, has to mimic the main service up to the main breaker in the main panel. Wiring inside needs to be the right stuff, not extension cords stuck in place.
Also, maybe consider other AC options such as a mini split. Avoid doing the holes in the roof. Seriously, for the electrical do it right.