The scope includes only cranes of the types described in para. 22-0.2.1 that are articulated by hydraulic cylinders and powered by internal combustion engines or electric motors and that are mounted on a mobile chassis or stationary installation. Articulating cranes equipped with a load hoist mechanism to broaden their versatility are covered by this Volume. Some basic machine types within this scope are convertible for excavating work and other uses not considered to be lifting service. The requirements of this Volume are applicable only to such machines when used as lifting cranes. Exemptions from this Volume include (a) all units with a maximum rated capacity of 2,000 lb (907 kg) or less (b) all units with booms constructed of nonconductive-type materials (c) all units equipped with or designed primarily for personnel baskets, platforms, ladders, etc. (d) all units when equipped with nonlifting attachments (e) all units while used in forestry and logging applications (f) telescoping boom cranes that do not articulate (covered under ASME B30.5) (g) scrap and material handlers as defined in ASME B30.25