307-98
Design and Construction of Reinforced Concrete Chimneys and Commentary
1995, Reapproved 1998, 30 pp.
$56.50

This standard gives material, construction, and design requirements for cast-in-place and precast reinforced concrete chimneys. It sets forth minimum loadings for the design of reinforced concrete chimneys and contains methods for determining the concrete and reinforcement required as a result of these loadings. The method of analysis applies primarily to chimney shells, however, a general proceudre for analysis of noncircular shape is included.

This standard is written in explicit, mandatory language, and as such, is intended for reference in project specifications.

Equations are provided for determining the temperature gradient through the concrete resulting from the difference in temperature of the gases inside the chimney and the surrounding atmosphere. Methods for combining the effects of dead and wind (or earthquake) loads with temperature both vertically and circumferentially are included in the standard. These methods permit the designer to establish minimum concrete and reinforcement requirements.

This standard refers extensively to "Building Code Requirements for Structural Concrete" (ACI 318); construction requirements are generally in accordance with 318; and notation is in accordance with ACI 304.

Contents:

Chapter 1--General

1.1--Scope
1.2--Drawings
1.3--Regulations
1.4--Reference standards

Chapter 2--Materials

2.1--General
2.2--Cement
2.3--Aggregates
2.4--Reinforcement

Chapter 3--Construction Requirements

3.1--General
3.2--Concrete quality
3.3--Strength tests
3.4--Forms
3.5--Reinforcement placement
3.6--Concrete placement
3.7--Concrete curing
3.8--Construction tolerances
3.9--Precast erection

Chapter 4--Service Loads and General Design Criteria

4.1--General
4.2--Wind loads
4.3--Earthquake loads
4.4--Special design considerations & requirements
4.5--Deflection criteria

Chapter 5--Design of Chimney Shell--Strength Method

5.1--General
5.2--Design loads
5.3--Required strength
5.4--Design strength
5.5--Nominal moment strength; Circular shells
5.6--Noncircular shells
5.7--Design for circumferential bending

Chapter 6--Thermal Stresses

6.1--General
6.2--Vertical temperature stresses
6.3--Circumferential temperature stresses

Appendix A--Notation