Evening Republican, Volume 59, Number 75, Rensselaer, Jasper County, 30 March 1917 — Concrete Chimney Stack. [ARTICLE]

Concrete Chimney Stack.

A concrete chimney, 300 feet high, built recently at the plant of a Texas smelting company, and embodying in its construction a number of new ideas, isdescrlbedinthePopularMechanics Magazine. The shell, or walls, forming a true circle and tapering from 20% inches thick at the bottom to 5 inches at the top, was built up with the aid of patent collapsible,’ or adjustable, steel forms, used in sections. These made it easier to secure the exact amount of tapering required as the chimney rose in height, the concrete being mixed and tamped in the forms. The upper part of the chimney was hiiilt with a patent top, including a number of 4-lnch pipe inlets, regularly spaced around the stack for the admission of air from the outside. This results in arresting many of the products of combustion carried up with the smoke —which then fall down the chimney into a hopper provided near the base.