Pump jack scaffold
Pump jack scaffold means a supported scaffold consisting of a platform supported by vertical poles and movable support brackets.
Source
29 CFR § 1926.450
Scoping language
Scope and application. This subpart applies to all scaffolds used in workplaces covered by this part. It does not apply to crane or derrick suspended personnel platforms. The criteria for aerial lifts are set out exclusively in 1926.453.