Abstract
The porpose of this paper is to clarify the capasity of materialization for the system of sliding down the snow from a roof by the force of gravity at the heavy snow area.
There are very diversities of it, for example, 50-83% from the building-to-land ratio, 8-17% from the relation of the open space and the length of a roof, 10-90% from the pitch of a roof. Therefore for generalize the system, we need to consider some counterplans for avoid the troubles oath other.
If we take nice counterplans, it will be able to more and more generalize the system ata town or village in a heavy snow area.
