Box ladder and method of manufacture thereof

Details Box ladder and method of manufacture thereof Box ladder and method of manufacture thereof

E - Fixed Constructions

06

C

26/111, 228/14,

E06C 1/00 (2006.01) E06C 7/00 (2006.01) E06C 7/08 (2006.01)

Patent

CA 2038187

- 20 - ABSTRACT OF THE DISCLOSURE A method of manufacturing box ladders having a pair of side rails and rungs wherein each of the side rails are assembled from a pair of section members having holes pre-formed prior to assembly of the side rail. The method provides reduced deformation in the manufacture of box ladders having cylindrical rungs and provides for the manufacture of box ladders having non-cylindrical shaped rungs, particularly D-rungs.

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