Volume B30.27 includes provisions that apply to the construction, installation, operation, inspection, and maintenance of mobile material placing booms, mobile telescoping boom conveyors, separate placing booms, and material placement accessories (see Figs. 1 through 3). This Volume does not apply to the pumping elements of a concrete pump, conveyors, mortar conveying or spraying machines, or dry mix shotcreting machines. The concrete pump portion of these machines is covered by CPMA 27-2000. The conveyor section of these machines is covered by ASME B20.1.