FIELD: construction industry, structural units of greenhouse roof. SUBSTANCE: hollow building unit is made of plastic with internal voids and carries joining links on two sides for connection of adjacent units. Joining link of one side is box-shaped structure which internal space houses stiffening girder and bottom part of this joining link is cellular. EFFECT: development of structure least of all subject to formation of cold zones. 15 cl, 4 dwg
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RU2208106C2 |
