Holders on | | 147.33| | | Labor | | 40.61| | | Foreman | 0.625 | 186.25| $883.75|$0.0441 per lb.| | | | | | Material: | | | | | Tank, rivets, etc.| | | | | (20,000 lb.) | | | 1,740.69| | $0.0875 | | | | | Iron-work: | | | | | Spiral stairway, | | | | | inlet, and overflow| | | | | pipes, ventilator, | | | | | reinforcing steel, | | | | | etc.: | | | | | Labor, Machinists | 0.50 | 89.50| | | Helper | 0.344 | 240.16| | | Labor | 0.281 | 100.79| 430.45| | | | | | | Material | |1,814.71| 1,814.71| | ---------------------+---------+--------+----------+---------------+--------- Total | | |$16,578.29| | ============================================================================= DISCUSSION MAURICE C. COUCHOT, M. AM. SOC. C. E. (by letter).--It appears to the writer that in the design of this structure two features are open to criticism. The first is that such a high structure was built of plain concrete without any reinforcement. Even if the computation of stresses did not show the necessity for steel reinforcement, some should have been embedded in the work. As a matter of fact, the writer believes that, with the present knowledge of the benefit of reinforced concrete, a structure such as this should not be built without it. This applies mainly to the tower below the tank.