How much weight does wet snow on roof add?

Difference in pound per square foot.

450.5 sq ft of roof 4000 lbs of ice less then 9 lbs per square foot. Human foot is roughly 1/2 square foot with over 100 lbs on it.

 

Do not forget that a gallon of snow is lighter than a gallon of water since h2o will expand when it freezes.

So all your math is off.

 

What does this have to do with the weight of a "gallon of snow"? I'm not talking about volume, but the weight of water.

He stated that removing the snow and ice decreased the weight by 3340 pounds. Since a gallon of water weighs 8.34 pounds, the snow and ice on his roof weighed the same amount as 400 gallons of water. I said that the snow and ice could weight as much as 500 gallons of water in my original post. I must have missed your post where you calculated the weight of the snow on his roof more accurately than I did.

 

It has a thick rubber blade that bends if it hits hard ice. It's thick enough to where it doesn't even Flex when you're scraping snow off the top.

 

264>14}x375-56£69~34=16.5
16.5 lbs per square foot

 

I’m pretty sure I was in Pa and saw a scraper at a Trucking Co I picked up at. Also first state I heard of making it illegal to run with the snow on trailer. Must have been 7 or more yrs ago.