Arrangement for open profile lengths

Claim 1

Arrangement for a pair of open profile lengths (1, 2) forming a closed channel structure (3) comprising: first and second substantially identical profile lengths (1, 2), each profile length (1, 2) having a base (6) with a first and a second end (6A, 6B), an external flange (5) extending from said base (6), an outgoing connecting element (7) extending out from said base (6), a base flange (15) extending from said outgoing connecting element (7), a longitudinal connecting element device (17) projecting substantially perpendicular to and outward from said outgoing connecting element (7), a longitudinal connecting element device (16) projecting substantially perpendicular to and inward from said connecting element (5), said outgoing connecting element (15) of said first profile length (1) being engageable with said external flange (5) of said second profile length (2) by the interlocking of said connecting element devices (16, 17) engaging with each other, further comprising a longitudinal male (8) and a longitudinal female (9) connecting element disposed on each of said profile lengths (1, 2), said longitudinal male and longitudinal female elements (8, 9, respectively) projecting substantially perpendicular to said base (6) and being disposed between said external flange (5) and said outgoing connecting element (7), said longitudinal male and said longitudinal female elements (8, 9, respectively) of said first profile length (1) being engageable with the corresponding longitudinal female and longitudinal male elements (9, 8, respectively) of said second profile length (2), whereby, upon engagement of said first profile length (1) with said second profile length (2), a plurality of discrete longitudinal spaces (10A, 10B, 10C) are formed.