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Standard Manholes used in New York City by the Consolidated Telegraph and Electrical 

 Subway Co., Mr. Edwin R. Quimby Chief Engineer. Nearly 4000 of these in use in New York 

 City alone. The cover is a slab, reinforced with "Steelcrete" Expanded Metal, resting on 

 I beams, and consumes the minimum amount of space, thus giving the largest obtainable room 

 for operations in the chamber. This construction is found to be the most durable and economical. 

 Where marshy soil is encountered expanded metal is placed in the sides and bottom also. 



