To find the number of gallons contained in a tank, multiply the length, width, and depth together, in feet. This gives the contents in cubic feet; multiply by 6·24, and the result is the number of gallons contained. If the dimensions are in inches, use ·003607 in place of 6·24.
SIZES AND WEIGHT OF CORRUGATED GALVANISED IRON SHEETS.
| Thickness B.W.G. | Size of Sheets | Weight Per Square Foot. | Square Foot per Ton. |
|---|---|---|---|
| Feet. | lb. oz. | ||
| 16 | 6 × 2 to 8 × 3 | 2 1 | 800 |
| 17 × 18 | 6 × 2 ” 8 × 3 | 2 4 | 1050 |
| 19 × 20 | 6 × 2 ” 8 × 3 | 1 12 | 1300 |
| 21 × 22 | 6 × 2 ” 7 × 2½ | 1 7 | 1600 |
| 23 × 24 | 6 × 2 ” 7 × 2½ | 1 3 | 1900 |
| 25 × 26 | 6 × 2 ” 7 × 2½ | 1 0 | 2250 |
THICKNESS AND WEIGHT OF GALVANISED SHEET IRON.
Size of sheet, 2 feet in width by from 6 to 9 feet in length.
| Wire Gauge. | Weight Per Square Foot. | Wire Gauge. | Weight Per Square Foot. |
|---|---|---|---|
| No. | Oz. | No. | Oz. |
| 30 | 10 | 22 | 21 |
| 29 | 11 | 21 | 24 |
| 28 | 12 | 20 | 28 |
| 27 | 14 | 19 | 33 |
| 26 | 15 | 18 | 37 |
| 25 | 16 | 17 | 43 |
| 24 | 17 | 16 | 48 |
| 23 | 19 | 14 | 60 |
QUALITIES OF DIFFERENT ROPES EXPRESSED RELATIVELY.
| Strength. | Rigidity. | Weight Dry. | Stretching. | |
|---|---|---|---|---|
| Italian Hemp | — | 1 | 1 | } |
| Baltic ” | 0·7 ·9 | 0·8 to 0·9 | 1 | } ¹∕₇ to ¹∕₁₂ |
| Manilla ” | 0·9 to 1 | 0·75 | 0·88 | } |
| Flax | 0·9 | low | — | ¹∕₇₅ |
| Iron Wire | 3 | high | 4 | — |
| Steel | 6 | high | 4 | — |
Steel wire rope stretches about ¹∕₃₆₀, ¹∕₂₅₀, and ¹∕₁₃₀, of ¼, ⅓, and ½ the breaking weight.