| 摘要 |
A coupling member for securing a ladder base end positionable against an unstable or uneven supporting surface. The coupling member includes a pair of receiving members disposed parallel and spaced apart for positioning the ladder base end thereupon and proximal of the supporting surface. A stabilizing cross-member extends between inner walls of the receiving members and is slidably adjustable in a width dimension to span a variety of ladder base widths. Outboard of each receiving member is disposed a side sleeve having an axially oriented channel therethrough in which a fixation member is slidably inserted to extend a contacting end against the supporting surface. Each fixation member is adjustable in height relative to respective side sleeves, thereby allowing the coupling member to be adjusted in a level orientation proximal the supporting surface with stabilization of the ladder base ends restrained in respective receiving members during load-bearing activity on the ladder.
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