Chicago : Engineering and Contracting Pub. Co. · leaf 404
District Sewer—FirstSection. The sizes vary from 23 ft. x 17%ft. to 12 ft. x 8V2 ft. ~ The lightest section,on the Glaise Creek Sewer, has a crownthickness of only 7 ins. Two other types of reinforced concretesewer have been used to suit peculiar con-ditions. These were in the Glaise Creek… … Fig. 15. Construction View South Harlem Sewer—First Contract. too small, as these bars invariably bend be-tween supports. Two and one-half inchesshould be the minimum for light bars. inforcing steel are given below. The ClassA and Class B concrete have been usedin the sewers. The Class *C concrete…
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