Proposed Standard Specification For The Design And Construction Of Reinforced Concrete Chimneys
E. A. Dockstader
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A brief summary of forced concrete of as specification for reinforcement specification sets forth recommended loadings, including provision for both wind and earthquake, for the design of reinforced concrete chimneys and methods for determining the stresses resulting from these loadings. The method of analysis includes determination of the stresses where flue openings occur as well as at sections where the cross section is an annularring.. Charts containing curves to aid in the rapid solution of the specified formulas are included. Recommended formulas are given for determining if the temperature of the resulting gradient through the concrete rerom the temperature of the gases inside the chimney and the surrounding atmosphere together with methods of determlning the stressesing the concrete and reinforcement, both vertically and circumferentially due to the temperature gradient through the concrete. Methods of combining these stresses with those due to dead load wind and earthquake are included, toqether with recommended allowable stresses for the various stress combinations. The specification includes recommended practice concerning the mixing concrete in chimneys and lacing, and curing of concrete lightning protection, access ladders, and other chimney accessories. An appendix covers the derivation of all the formulas used in the specification and sets forth the assumtions on which the formulas are based. Note - This paper is a summary only of the specifications.