Concrete blocks for spacers, 

 60 Frozen, 83 Inspection, 

 74 In running water, 57 

 In beams and girders, 57 

 In columns, 57 Jar or shock 

 to new, 25 Mixing, 84 

 Placing, 86 Pressure of 

 wet, (table) 29 Saddles, 

 mold for, 37 Spacers, 37 

 Water for, 84. 



Co-ope ration between trades, 

 61. 



Core-box type of floor center 

 ing, 13. 



Cost of steel, 7. 



Covering stack, 63. 



Crude oil on forms, 28. 



Cutting holes, 61 Out con- 

 crete, 89. 



Decimal equivalents for frac- 

 tions of an inch, (table) 

 102. 



Deformed or plain steel, 6. 



Demurrage rules, 65. 



Design of floor centering, 8. 



Determination of percentage of 

 voids, 42. 



Differential for size (steel bars), 

 93. 



Drawings, 77. 



Drills for concrete, 62. 



Duties of inspectors, 75. 



Effect of fineness of sand on 



mortar, 101. 



Empty cement sacks, 62. 

 End anchorage, (table) 38, 41. 

 Engineer, 62. 

 Engines, care and operation, 



62. 

 Erecting floor centering, 21. 



124 



Expanded metal, size of sheets 

 of, (table) 103. 



Fabrication amd placing of 



steel, 30. 



Feeding the mixer, 50. 

 Field-made hopper. 51 Hoist, 



Field manufacture of concrete, 

 42 Notes, 59. 



Fineness of cement, 108, 109, 

 114 Of sand on mortar, (ta- 

 ble) 101. 



Finish for concrete surfaces, 

 72. 



Fire insurance, 64. 



Floor centering, corebox type, 

 13 Opening in, 21 Panel 

 type, 13 Centering, 8 Cen- 

 tering joists, 19 Centering, 

 erecting, 21. 



Floors, openings in, 38 

 Weights of merchandise on, 

 (table) 104, 105, 106 Wet, 

 57. 



Flues, 63. 



Forms, 87. 



Footing, centering, 25. 



Forms, cleaning out, 82 For 

 reinforced concrete, 8, 81 

 Removal of, 82. 



Frame for hand mixing, 53. 



Freezing weather, 58, 85. 



Freight, 64. 



Frozen concrete, 83. 



or 



Gasoline, 67. 

 Gears, boxing, 63. 

 Girder, typical reinforced con- 

 crete, 40. 

 Gravel as aggregate, 5, 78. 



