Commercial greenhouse with parallel gutters on uprights - has double usual upright spacing with reinforced gutter to take roof load, allowing use of simple normally spaced transverse members

摘要

The (commercial) greenhouse comprises a number of parallel gutters (1) each supported by U-section upright posts horizontally spaced at 6m intervals. Half-way each spacing length, each gutter is reinforced via a downwardly extending 50 cm long vertical U-section part (2) of which the lower end is bolted to the ends of two metal strips (3). - The other end is bolted to the upper ends of the respective uprights. Near their upper ends, the uprights and the U-section part (2) have 30 cm long cross-piece secured to it. The ends of transverse members are bolted or welded to the respective ends of these cross-pieces.