Page 504 - 2018_Complete_14_Collection (1)_Neat

MASONRY

For SI: 1 inch = 25.4 mm, 1 square inch = 645 mm .
2
FIGURE 2113.16
FLUE SIZES FOR MASONRY CHIMNEYS

TABLE 2113.16(1) TABLE 2113.16(2)
NET CROSS-SECTIONAL AREA OF ROUND FLUE SIZES a NET CROSS-SECTIONAL AREA OF SQUARE
AND RECTANGULAR FLUE SIZES
FLUE SIZE, INSIDE DIAMETER CROSS-SECTIONAL AREA
(inches) (square inches) FLUE SIZE, OUTSIDE NOMINAL CROSS-SECTIONAL AREA
DIMENSIONS (inches) (square inches)
6 2 8
4.5 × 8.5 23
7 3 8
4.5 × 13 34
8 5 0
8 × 8 42
10 78
8.5 × 8.5 49
3
10 / 4 90
12 113 8 × 12 67
8.5 × 13 76
15 176
12 × 12 102
18 254
8.5 × 18 101
2
For SI: 1 inch = 25.4 mm, 1 square inch = 645.16 mm .
a. Flue sizes are based on ASTM C315. 13 ×13 127
12 × 16 131
13 × 18 173
16 × 16 181
16 × 20 222
18 × 18 233
20 × 20 298
20 × 24 335
24 × 24 431
2
For SI: 1 inch = 25.4 mm, 1 square inch = 645.16 mm .
2018 INTERNATIONAL BUILDING CODE ® 477
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