Rated Load Marking. A radius indicator or boom angle indicator, compatible with the load rating chart, shall be provided where it is clearly visible to the operator in his or her normal operating position on all derricks equipped with a movable working boom.
Or. Admin. Code § 437-002-0232
Stat. Auth.: ORS 654.025(2) & ORS 656.726(3)
Stats. Implemented: ORS 654.001 - ORS 654.295