| 摘要 |
A ladder having pivotable folding riser sections, includes at least one pair of elongated riser components connected by a folding joint. The components have mating contacting ends abutting each other at an angle 45 DEG from the linear axis of the components. A reinforcing member concentric with said components is positioned across the joint, and a pivotable connection is formed by hinge members connected to each of the ladder components which are pivotally connected to each other by means of a hinge pin located exteriorally of the components. The invention also provides pivoting stand off members and a strap tightening mechanism for providing tightening tension equally on both ends of the strap which thus is not caused to move laterally during tightening.
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