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Roof snow load shape coefficient:
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Ratio of the snow load on the roof to the undrifted snow load on the ground, without the influence of exposure and thermal effects.
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Rope grade rr:, английский
A level of requirement of breaking force which is designated by a number (e.g. 1770 [n/mm2], 1960 [n/mm2]) note: rope grades do not necessarily correspond to the tensile strength grades of the wires in the rope.
Robustness:, английский
The ability of a structure to withstand events like fire, explosions, impact or the consequences of human error, without being damaged to an extent disproportionate to the original cause.
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