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Discussion in 'Cargo Carriers / Bike Racks / Other Storage Option' started by peter moyes, Feb 6, 2018.
Most pups aren't designed to carry an extra 300-400 lbs of weight on the roof, much less the added stress of cranking it down with ratchet straps.
It was 245. The weight over the outer edge of the roof while the pup was closed. As I said my pup is over 20 years old and no roof issues. That’s my experience do as you choose.
Looking at pictures of a sunfish sailboat, I think blocks meant for standup paddle boards may work better for you than canoe gunwale blocks. I’d use a pair of 2x4s across the roof to spread the load, then put the foam blocks on that and strap it all down to the frame.
I have yet to fabricate this, but my plan is to build two supports inside that will run vertically between where the beds meet when closed. Have a 'T' on top and bottom to spread out the load and also run some foam on the top to protect the ceiling. This will keep the roof a lot more stable when going over any bumps with a heavy load on the roof. Quickest and easiest way to add maximum support IMO.
Also could do a measurement of the distance between the ceiling and bed when closed and add some firm foam blocks of a little larger size (take into consideration the mattresses will compress) and spread those around on pressure points on the roof.