FIG. 128.—Segmental Block Sewer at Clinton, Iowa. ] =186. Organization.=—The number of men employed on a brick or block sewer is proportioned according to the size of the sewer and the working conditions. The number of men working on different tasks usually bears the same ratio to the number of masons employed, regardless of the size of the work. These proportions are shown for different jobs, in Table 66. TABLE 66 ORGANIZATIONS FOR THE CONSTRUCTION OF BRICK AND BLOCK SEWERS ─────────────┬──────────────┬────────┬────────┬────────┬────────┬────────── │ │ │ │ │ 84– to │ │General Ratio │15–foot,│66–inch │84–inch │108–inch│ 42–inch Type of Work │ on Basis of │ 5–ring │Circular│Circular│ Sewer │Lock-Joint │ Four Brick │ Brick, │ Brick, │ Brick, │Brick in│Tile Block │ Layers │Chicago │ Gary │ Gary │Detroit │ │ │ │ │ │ Tunnel │ ─────────────┼──────────────┼────────┼────────┼────────┼────────┼────────── Foreman │ 1│ 1│ 1│ 1│ 1│ 1 Brick layers │ 4│ 12│ 6│ 6│ 5│ 2 Helpers │ 2│ 11│ 3│ 3│ │ 1 Scaffold men │ 2│ 21│ 3│ │ │ Brick tossers│ 2│ 7│ │ 15│ │ 2 Brick │ 2│ 2│ │ │ │ 2 carriers │ │ │ │ │ │ Cement mixers│ 2│ 6│ 6│ 5│ │ 1 Cement │ 2│ 10│ │ 8│ │ carriers │ │ │ │ │ │ Form setters │ 1│ │ 3│ 3│ │ Laborers │ 1│ 8│ 19│ 3│ 14│ 7 │ Municipal │ Source of │ Engineering, │ H. P. Gillette, Handbook of Cost Data Information│ Vol. 54, p. │ │ 228 │ ─────────────┴──────────────┴──────────────────────────────────────────────