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MODERN GASWORKS PRACTICE
3. Through bench (charging and discharging machinery)— Bench, 20 feet.
Charging side, 23 feet.
Discharging side, 17 feet.
Total width of house, 60 feet;
Height of bench from top of foundation to top of brick-work, 24 feet 6 inches to 26 feet for 5 tiers.
Height of house to eaves (stage type), 41 feet, with continuous hoppers.
Height of house to eaves (stage type), 36 feet, with hoppers between roof trusses.
The height of the bench naturally depends upon the nurnber of tiers in which the retorts are set, and an approxi-mate rule gives an allowance of 29 inches of height for each tier. This gives the distance from charging floor to the soffit of the main arch.
Kig. 20.—Regenerative Stop-end Setting.
Thus for a setting of 10’s in two rows of 5 the height to the underside of the arch would be approximately 12 feet. For a setting of 8’s in three rows the height would be 8 feet to 8 feet 9 inches. So far as the width of the main arch. is concerned, the dimensions (from inside to inside of pier walls) are as follows :—
For two rows : 7 feet 9 inches to 8 feet 9 inches, depending on the size of retorts employed.
For three rows : 8 feet 6 inches to 9 feet ,,