2113.16 Flue area (masonry fireplace).
BC § 2113.16
Flue sizing for chimneys serving fireplaces shall be in accordance with Section 2113.16.1 or 2113.16.2. Table 2113.16(1)Net Cross-Sectional Area of Round Flue Sizes a Flue Size, Inside Diameter(inches)Cross-Sectional Area(square inches)Flue Size, Inside Diameter(inches)Cross-Sectional Area(square inches)6 28 7 38 8 50 10 78 10 3/490 12 113 15 176 18 254 For SI: 1 inch = 25.4 mm, 1 square inch = 645.16 mm 2 a. Flue sizes are based on ASTM C 315. Table 2113.16(2)Net Cross-Sectional Area of Square and Rectangular Flue Sizes a Flue Size, Outside Nominal Dimensions(inches)Cross-Sectional Area(square inches)Flue Size, Outside Nominal Dimensions(inches)Cross-Sectional Area(square inches)4.5 × 8.5 23 4.5 × 13 34 8 × 8 42 8.5 × 8.5 49 8 × 12 67 8.5 × 13 76 12 × 12 102 8.5 × 18 101 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 For SI: 1 inch = 25.4 mm, 1 square inch = 645.16 mm 2 a. Flue sizes are based on ASTM C 315. For SI: 1 inch = 25.4 mm, 1 square inch = 645 mm 2 . Figure 2113.16Flue Sizes for Masonry Chimneys
