Open Question: 1987 coleman camper model 216?

i have a 1997 coleman pop-up camper i want to put a airconditionar on the roof what i need to know is how much weight the roof will hold and still be able to raise the roof with out problems
1987 coleman pop-up camper model number 216 its a 8 foot by 6 foot

Source:
http://answers.yahoo.com/question/index?qid=20110713145733AA5XOkJ

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