228 



ACTUAL COSTS AND CAPACITY OF GASWORKS. 



Station meter. The station meter 

 is fixed on a concrete foundation, 

 6 inches thick. It is fitted with 

 by-pass, valves, and other acces- 

 sories. The capacity is 180,000 

 cubic feet per day, or 36,000,000 

 cubic feet per annum. Cost, 

 second-hand, including foundations, 

 ^80. 



Gasholder foundations. Although 

 it is best to err on the side of safety 

 when providing foundations, it is 

 not an uncommon thing to exag- 

 gerate greatly the thickness of 

 concrete necessary to support such 

 a structure as a gasholder fixed in 

 a steel tank. Naturally, a good 

 deal depends upon the site selected. 

 In this instance, trial holes showed 

 that the subsoil was of such a 

 character that the thickness of con- 

 crete over a greater part of the 

 area could safely be fixed at 12 

 inches, and the remainder was made 

 i foot 6 inches thick. The gas- 

 holder is of the Gadd and Mason 

 type, in a steel tank, two lifts, 

 each 20 feet deep, the top lift being 

 60 feet and the outer lift 62 feet 

 diameter. The steel tank is 63 

 feet 6 inches diameter by 20 feet 

 4 inches deep. 



Steel tank. The bottom plates 

 are J-inch thick, riveted with f-inch 

 rivets, 2-inch pitch, 2-inch lap, 

 joints being taped. The top and 

 bottom curbs are 3|-inch by 3^- 

 inch by 4-inch angle steel, the 

 joints being covered with round 

 backed angle steel, i foot inches 





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