| 摘要 |
A continuous, cold rolled metal section for forming an n-sided closed frame is divided along its length by transverse aligned cuts (1, 2, 3) in longitudinally spaced pairs at its opposite sides respectively, the cuts dividing the section into the number of sides (6, 7, 8, 9) of the frame which are foldable relative to one another to form a predetermined angle of the frame, in use. The two end sides (6, 9) of the section have in their respective sides, which overlap on assembly of the frame, holes (4, 5) respectively which, when said two end sides are at the correct angle to one another in the assembled frame, are spaced linearly apart by a predetermined distance. In this way the required frame geometry can easily be achieved, assembly requiring only a simple reference tool (11; 13). |
