Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910 | Page 5

the erection of the steel tank. The material cost in this case was also exceedingly high.
In the case of the concreting, inability to purchase a hoist and motor and the high cost of renting the same, together with the delays mentioned, added greatly to the unit cost.
When it is considered that the cost of plastering covers that of four coats over the entire inside of the tank and three more over about one-third of it, it does not appear so high, especially in view of the high rate of wages paid.
The cost per yard for concrete alone was $25.126, and this is probably about 25% in excess of the cost of the same class of work executed under more favorable conditions as to location, weather conditions, etc.
TABLE 1.--COST OF HIGH-LEVEL TOWER, VICTORIA WATER-WORKS. (412 cu. yd.)
============================================================================= | TOTAL COST. | UNIT COST. ---------------------+---------+--------+----------+---------------+--------- | Rate | | | | | per | Amount.| Complete.| Labor. |Material. | hour. | | | | ---------------------+---------+--------+----------+---------------+--------- Preliminary Work: | | | | | Labor, Carpenter |$0.50 |$11.00 | | | Labor | 0.344 | 64.94 | | | " | 0.281 | 249.67 | $325.61| $0.790 | Material | | 133.62 | 133.62| | $0.324 | | | | | Forms: | | | | | Buildings, shifting | | | | | and stripping: | | | | | Labor, Carpenter | 0.50 |1,832.99| | | Labor | 0.344 | 80.85| | | " | 0.281 | 563.84| 2,477.68| 6.014 | | | | | | Material: | | | | | Lumber | | 583.49| | | Hardware | | 325.51| | | Miscellaneous | | 13.90| 922.90| | 2.240 | | | | | Scaffold: | | | | | Erecting and | | | | | tearing down: | | | | | Labor, Carpenter | 0.50 | 693.00| | | Labor | 0.344 | 350.59| | | " | 0.281 | 117.27| 1,160.86| 2.818 | | | | | | Material: | | | | | Lumber | | 487.77| | | Hardware | | 202.79| 690.56| | 1.676 | | | | | Concreting: | | | | | Labor | 0.50 | 142.00| | | " | 0.344 | 11.00| | | " | 0.281 | 947.81| 1,100.81| 2.672 | Material: | | | | | Rock | | 317.30| | | Sand | | 385.72| | | Cement | |1,581.97| | | Motor and Hoist: | | | | | Rental | | 406.56| | | Power | | 83.53| 2,735.08| | 6.638 | | | | | Plastering | | | | | (3,000 sq. ft.): | | | | | Labor, Plasterers | 0.75 | 116.50| | | Labor | 0.46-7/8| 15.00| | | " | 0.37-1/2| 198.52| | | " | 0.281 | 105.66| 435.68| 14.52 | | | | | per sq. ft. | Material: | | | | | Sand | | 8.64| | | Cement | | 66.10| | | Alum and Potash | | 16.00| 90.74| 3.25 | | | | | per sq. ft. | | | | | | Cement Wash | | | | | (8,560 sq. ft.): | | | | | Labor | 0.48-3/4| 50.00| | | " | 0.281 | 47.68| 97.68|1.14 per | | | | | 100 sq ft. | Material: | | | | | Cement | | 15.18| 15.18| 0.18 " " " " | | | | | | Windows, doors, | | | | | and scuttle: | | | | | Labor | 0.50 | 49.00| 49.00| | Material: | | | | | 1 door, | | | | | 7 windows, etc. | | 47.26| 47.26 | | | | | | | Equipment: | | | | | 40% of $461.46 | | 184.58| 184.58| 0.448 | | | | | | Superintendence | | | 1,241.45| 1.506 | | | | | | Steel Tank: | | | | | Labor, Carpenter |$0.50 | $124.24| | | Helper | 0.344 | 2.75| | | Boiler-makers | | 382.57| | | 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 |