(All Dimensions in Inches)
────────┬──────────────────┬──────────────────
Rope │ Steel │ Iron
Diam. ├────────┬─────────┼────────┬─────────
│ 7-Wire │ 19-Wire │ 7-Wire │ 19-Wire
────────┼────────┼─────────┼────────┼─────────
1/4 │ 20 │ 12 │ 40 │ 24
5/16 │ 25 │ 15 │ 50 │ 30
3/8 │ 30 │ 18 │ 60 │ 36
7/16 │ 35 │ 21 │ 70 │ 42
1/2 │ 40 │ 24 │ 80 │ 48
9/16 │ 45 │ 27 │ 90 │ 54
5/8 │ 50 │ 30 │ 100 │ 60
11/16 │ 55 │ 32 │ 110 │ 66
3/4 │ 60 │ 35 │ 120 │ 72
7/8 │ 70 │ 41 │ 140 │ 84
1 │ 80 │ 47 │ 160 │ 96
1 1/8 │ 90 │ 53 │ 180 │ 108
1 1/4 │ 100 │ 58 │ 200 │ 120
1 3/8 │ 110 │ 64 │ 220 │ 132
1 1/2 │ 120 │ 70 │ 240 │ 144
────────┴────────┴─────────┴────────┴─────────
DIAMETER OF MINIMUM SHEAVES IN INCHES, CORRESPONDING TO A MAXIMUM SAFE
WORKING TENSION.
─────────────┬────────────────────────────┬───────────────────────────
Diam. of Rope│ Steel │ Iron
in Inches ├────────┬─────────┬─────────┼────────┬─────────┬────────
│ 7-Wire │ 12-Wire │ 19-Wire │ 7-Wire │ 12-Wire │ 19-Wire
─────────────┼────────┼─────────┼─────────┼────────┼─────────┼────────
1/4 │ 19 │ 15 │ 11 │ 39 │ 31 │ 23
5/16 │ 24 │ 19 │ 14 │ 49 │ 38 │ 29
3/8 │ 29 │ 22 │ 17 │ 59 │ 46 │ 35
7/16 │ 34 │ 26 │ 19 │ 69 │ 54 │ 41
1/2 │ 38 │ 30 │ 22 │ 79 │ 61 │ 47
9/16 │ 43 │ 33 │ 25 │ 89 │ 69 │ 52
5/8 │ 48 │ 37 │ 28 │ 99 │ 77 │ 58
11/16 │ 53 │ 41 │ 31 │ 109 │ 84 │ 64
3/4 │ 58 │ 44 │ 34 │ 119 │ 92 │ 70
7/8 │ 67 │ 52 │ 39 │ 138 │ 107 │ 81
1 │ 77 │ 59 │ 45 │ 158 │ 123 │ 93
─────────────┴────────┴─────────┴─────────┴────────┴─────────┴────────
ENGINEERING BULLETINS PUBLISHED BY THE STATE COLLEGE OF WASHINGTON
ENGINEERING EXPERIMENT STATION.
1. Sewage Disposal for the Country Home.
Septic tanks and underground distribution systems.
By O. L. Waller and M. K. Snyder. Mar. 1914, July 1916.
2. How to Measure Water.
Construction of weirs and tables for same.
By O. L. Waller. Oct. 1915.
3. Water Supply for the Country Home.
Water Sources, pumps, filters, storage tanks and cost data.
By M. K. Snyder. Jan. 1916 (out of print).
4. Construction and Maintenance of Earth Roads.
Grades and grading, drainage and dragging.
By L. V. Edwards. April 1916.
5. Cost of Pumping for Irrigation.
Cost of equipment and operation of same,
with tables of efficiency.
By O. L. Waller. Aug. 1916 (out of print).
6. Fuel Economy in Domestic Heating and Cooking.
Fuel Tables, heating equipment and care of same.
By B. L. Steele. Dec. 1917.
7. Thawing Frozen Water Pipes Electrically.
Method of Thawing and list of equipment needed.
By H. J. Dana. Oct. 1921.
8. The Use of Ropes and Tackle.
Illustrations of application to different jobs.
By H. J. Dana and W. A. Pearl. Mar. 1922.
9. Well and Spring Protection.
By M. K. Snyder. (In preparation).
10. Water Purification for the Country Home.
By M. K. Snyder. (In preparation).
11. Farm Water Systems.
By M. K. Snyder and H. J. Dana. (In preparation).
12. Commercial and Economic Efficiency of Commercial Pipe Coverings.
By H. J. Dana. (In preparation).
[Illustration: Mechanics Arts Building--Headquarters Mechanical
Engineering Experiment Station]
=_The State College of Washington_=
Founded and Maintained by the National Government and the
State of Washington
College of Agriculture and Experiment Station
Farm Crops, Soils, Animal Husbandry, Dairy Husbandry, Poultry
Husbandry, Horticulture, Landscape Gardening, Forestry, Farm
Management, Plant Pathology, Agricultural Engineering.