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DUARIB
PATENT
D040373A
2
Set the ladder perpendicular to the base body,
without forcing, then set the pins.
3
Hang the other ladder to the base body by slightly
tilting it.
Base body assembly
Hang the base body on a ladder by setting it on a
rung, while the ladder is slightly tilted.
The screeds of
the base body must wrap around the ladder's upright.
4
Set the ladder perpendicular to the base body,
without forcing, then set the pins.
5
Cross the braces so the whole structure is stronger
