For the actual mandatory requirements of the code, see the indicated section of text.ī. This table does not cover all requirements, nor does it cover all aspects of the indicated requirements. Letter references are to Figure R1001.1, which shows examples of typical construction. Note: This table provides a summary of major requirements for the construction of masonry chimneys and fireplaces. Solid masonry units or hollow masonry units grouted solid with not less than 4-inch nominal thickness.Įffective flue area (based on area of fireplace opening)ġ2" hooked around outer bar with 6" extension.įor SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 square foot = 0.0929 m 2. ![]() 4 bars for each additional 40" or fraction of width or each additional flue.ġ/ 4" ties at 18" and two ties at each bend in vertical steel. 4 full-length bars for chimney up to 40" wide. Smoke chamber wall thickness Unlined wallsįour No. Reinforced to carry its own weight and all imposed loads.ġ0" solid brick or 8" where a firebrick lining is used. 12" fireplace opening ≥ 6 square foot.ġ6" fireplace opening < 6 square foot. TABLE R1001.1 SUMMARY OF REQUIREMENTS FOR MASONRY FIREPLACES AND CHIMNEYS ITEMĨ" fireplace opening < 6 square foot. Masonry fireplaces shall be constructed in accordance with this section and the applicable provisions of Chapters 3 and 4.
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