Snow can weigh anywhere from about 7 pounds per cubic foot for big fluffy flakes to over 20 pounds per cubic foot for wet, packed, or drifted snow.  On average, snow weighs about 15 pounds per cubic foot.  For the decks in Mount Air, two feet of snow accumulation can mean about 6,000 pounds of weight on your deck.  That's equivalent to about 40 people or 2½ compact cars.

 

For safety reasons, everyone should take the precaution of clearing the snow from their deck.  For home with older decks, this is much more important since most older decks only have support columns on the front of the deck and are only bolted to the house on the back.