Greenhouse roof, with a thin and transparent film covering, has a height setting mechanism at the roof ridge to raise it and stretch the film over the roof tie without allowing it to flutter in the wind

摘要

The greenhouse roof has a thin and transparent film (22) stretched over the longitudinal ridge and rafters projecting from it. The rafters (20) of the roof tie (26) are linked together by a short lateral strut (12) at their ends. A mechanism (14) at the center sets the height adjustment of the ridge (16) over the axial length of the greenhouse (10).