// CODE SNIPPET
1106.7 Scupper Sizing
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Scuppers shall be sized in accordance with Table 1106.7.
TABLE 1106.7
SIZING SCUPPERS FOR A-5 INCH PER HOUR RATE OF RAINFALL
SIZING SCUPPERS FOR A-5 INCH PER HOUR RATE OF RAINFALL
| HEAD IN INCHES | HORIZONTALLY PROJECTED ROOF AREA (SQUARE FEET) | ||||||
| LENGTH OF WEIR IN INCHES | |||||||
| 4 | 6 | 8 | 12 | 16 | 20 | 24 | |
| 1 | 230 | 346 | 461 | 692 | 923 | 1153 | 1384 |
| 2 | 641 | 961 | 1282 | 1923 | 2564 | 3205 | 3846 |
| 3 | 1153 | 1730 | 2307 | 3461 | 4615 | 5769 | 6923 |
| 4 | 1794 | 2692 | 3589 | 5384 | 7179 | 8974 | 10,769 |
Note:
To adjust this table for other than a 5-inch design rain fall rate, multiply the square footage on the table by 5 then divide by the local design rain fall rate.
Example:
For 4 inches of design rainfall rate, a 4-inch long scupper with a 1-inch head would accommodate 287 square feet. (230 x 5) ÷4 = 287.
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