ACTUAL COSTS AND CAPACITY OF GASWORKS. 



229 



long. The ends of the bars are machine sawn, to ensure 

 a perfect butt. The bottom curb is riveted to the sides 

 and bottom with f -inch rivets, 2 J- nch centres, and the top 

 curb to the sides with J-inch rivets, 6-inch centres. There 

 are five rows of side plates, the two bottom rows being 

 -^-inch and the top three rows J-inch plates. The hori- 

 /ontul and vertical seams are riveted together with f-inch 



Concrete in segment 

 CAD l'-6'thic 



Fig. 36. Gasholder Tank Foundation : Plan. 



rivets, aj-inch pitch and 4i-inch lap, the two bottom rows 

 being double riveted and the remainder single riveted. 

 There are six pairs of steel brackets of J-inch plate, and 

 3^-inch by 3^-inch by J-inch angles, riveted to sides of tank, 

 to" take the cast-iron base plates and carriages for guiding 



