Strong greenhouses often have a curved roof or a gothic shape, as these forms best withstand heavy snow and severe wind. The shape will not allow the wind to get hold of the structure – and, in general, the snow will slide off, so the structure is not strained and, at the same time, light can enter the greenhouse. Strong greenhouses have a much higher snow and wind load than ordinary greenhouses, so they are especially suitable for areas with much snow where ordinary greenhouses may not be strong enough to withstand......

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