Load On Strut

Both the Electrical Engineer and Structural Engineer need design this. Not the electrical contractors estimator. Even if the strut structure will hold the weight that is a very large load to be placed on the roof structure.
 
A thumbnail estimate:

Snow weighs 20 lbs per cubic feet. NJ can get 3 feet of snow, maybe more, kinda guessing. That would be 60 lb per square foot of roof. 1,000 lbs / 60 lb = 16.6 Call it 16 so that we can say the load per roof caddy equals a 3 foot snow load on a 4' x 4' area. With the spacing at 7', it may be ok, but like others are saying, it need to be professionally engineered.
 
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