How to Calculate Roof Snow Loads - (Aren't you glad you live in San Diego!?)

http://bit.ly/dZuO4c

Whether you are building an accessory structure in the backyard or trying to decide whether you need to shovel off your roof after a storm, you need a way to learn whether your roof materials are up to the weight--expressed as psf, or pounds per square foot--of the snowfall in your area. This pressure is increased or decreased based on the pitch of the roof. You can compute real-time snow load for quick decision-making or use official figures to design a new building.