Chicago : Engineering and Contracting Pub. Co. · leaf 698
and 3 the batter is allin the top three feet of the wall, and the in-side diameter of the covers used is 22 ins.In No. 2 the batter is in the upper 2 ft. ofthe wall and the diameter of the inside ofthe cover is 32% ins. The cast iron coversused are 7%, 9 and 2% ins. deep, for man-holes Nos. 1, 2… … shall be carried to the grade given by theengineer. Manholes shall be neatly and accurately bull,according to plans furnished or- directions given
Buildings
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