scope:

This standard covers the design and construction of circular cast-in-place or precast reinforced concrete chimney shells. If other shapes are used, their design shall be substantiated in accordance with the principles used here. The standard does not include the design of linings, but includes the effects of linings on the concrete shell.

A precast chimney shell is defined as a shell constructed wholly from precast reinforced concrete sections, assembled one atop another, to form a freestanding, self-supporting cantilever. Vertical reinforcement and grout are placed in cores as the precast sections are erected to provide structural continuity and stability. The use of precast panels as stay-in-place forms is considered cast-in-place construction.