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Generally the load on roofs consists of two components: the snow load and the wind-pressure. The action of these loads is quite different on flat roofs and pitched ones. The snow load on flat roofs is great; practically it is at the maximum. As to the wind pressure on roofs of this type, it is very small – practically it is at its minimum. On pitched roofs the situation is different; when the pitch of the roof increases the weight of the snow load decreases. As to the wind-pressure, it increases with the increase of the pitch.
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On pitched roofs when the pitch of the roof increases the weight of the snow load …