Polytunnel structure

Abstract

A polytunnel structure is described which comprises a plurality of rows of leg members, and a plurality of cover support members, each cover support member being supported at one end by a leg of one of the rows, and at its opposite end by a corresponding leg of an adjacent one of the rows, wherein at least one of the cover support members is of tubular form of non-circular cross-sectional shape having a major axis and a minor axis, wherein, in use, the minor axis extends generally parallel to a ground surface upon which the polytunnel structure is used, and the major axis extends perpendicularly to the minor axis.

1 . A polytunnel structure comprising a plurality of rows of leg members, and a plurality of cover support members, each cover support member being connected at one end to a leg of one of the rows, and at its opposite end to a corresponding leg of an adjacent one of the rows, wherein at least one of the cover support members is of tubular form of a material of non-circular cross-sectional shape having a major axis and a minor axis, wherein, in use, the minor axis extends generally parallel to a ground surface upon which the polytunnel structure is used, and the major axis extends perpendicularly to the minor axis, wherein at least some of the legs include a support part for cooperation with the end part of the associated cover support member, the support part being of non-circular cross-sectional shape. 
     
     
         2 . A structure according to  claim 1 , wherein the support part is of substantially the same cross sectional shape as, but of smaller dimensions than, the end part of the associated cover support member to allow the support part to be received within the end part of the cover support member. 
     
     
         3 . A structure according to  claim 1 , wherein throughout the length of the cover support member the major axis extends in a vertical direction or in a direction having a vertical component. 
     
     
         4 . A structure according to  claim 1 , wherein the cover support members have a cross-sectional shape in the form of a pair of part circular regions spaced apart from one another by substantially straight sides. 
     
     
         5 . A structure according to  claim 1 , wherein each leg includes an arm or projection for cooperation with an end part of the associated cover support member, the arm or projection being of non-circular cross-sectional shape and defining the support part. 
     
     
         6 . A structure according to  claim 5 , wherein each leg has two such arms or projections associated therewith. 
     
     
         7 . A structure according to  claim 5 , wherein the arm or projection is coaxial with the leg. 
     
     
         8 . A structure according to  claim 5 , wherein each arm or projection is of dimensions smaller than those of the cover support member to allow the arm or projection to be received within an end part of the cover support member. 
     
     
         9 . A structure according to  claim 1 , further comprising at least one clip or clamp adapted to be fitted to a cover support member of non-circular cross-section. 
     
     
         10 . A cover support member, leg, clamp or clip adapted for use in a polytunnel structure, the polytunnel structure comprising a plurality of rows of leg members, and a plurality of cover support members, each cover support member being connected at one end to a leg of one of the rows, and at its opposite end to a corresponding leg of an adjacent one of the rows, wherein at least one of the cover support members is of tubular form of a material of non-circular cross-sectional shape having a major axis and a minor axis, wherein, in use, the minor axis extends generally parallel to a ground surface upon which the polytunnel structure is used, and the major axis extends perpendicularly to the minor axis, wherein at least some of the legs include a support part for cooperation with the end part of the associated cover support member, the support part being of non-circular cross-sectional shape.