IRC 2021 · Model

Chapter 10: Chimneys And Fireplaces

48 sections in this chapter of the IRC 2021 model text — not Model's amended edition.

R1001.1 General Masonry fireplaces shall be constructed in accordance with this section and the applicable provisions of Chapters 3 and 4. TABLE R1001.1SUMMARY OF REQUIREMENTS FOR MASONRY FIREPLACES AND CHIMNEYS ITEM LETTERa REQUIREMENTS Hearth slab thickness A 4 inches Hearth extension(each side of opening) B 8-inch fireplace opening < 6 square feet.12-inch fireplace opening ≥ 6 square feet. Hearth extension(front of opening) C 16-inch fireplace opening < 6 square feet.20-inch fireplace…

Plain-English guides for this chapter
  1. R1001.1General
  2. R1001.10Hearth extension dimensions
  3. R1001.11Fireplace clearance
  4. R1001.2Footings and foundations
  5. R1001.2.1Ash dump cleanout
  6. R1001.3Seismic reinforcing
  7. R1001.3.1Vertical reinforcing
  8. R1001.4Seismic anchorage
  9. R1001.4.1Anchorage
  10. R1001.5Firebox walls
  11. R1001.5.1Steel fireplace units
  12. R1001.6Firebox dimensions
  13. R1001.7Lintel and throat
  14. R1001.8Smoke chamber
  15. R1001.9Hearth and hearth extension
  16. R1002.1Definition
  17. R1002.2Installation
  18. R1002.3Footings and foundation
  19. R1003.1Definition
  20. R1003.10Wall thickness
  21. R1003.11Flue lining (material)
  22. R1003.12Clay flue lining (installation)
  23. R1003.13Multiple flues
  24. R1003.14Flue area (appliance)
  25. R1003.18Chimney clearances
  26. R1003.2Footings and foundations
  27. R1003.3Seismic reinforcing
  28. R1003.3.1Vertical reinforcing
  29. R1003.4Seismic anchorage
  30. R1003.4.1Anchorage
  31. R1003.5Corbeling
  32. R1003.6Changes in dimension
  33. R1003.7Offsets
  34. R1003.8Additional load
  35. R1003.9Termination
  36. R1003.9.1Chimney caps
  37. R1004.1General
  38. R1004.2Hearth extensions
  39. R1004.3Decorative shrouds
  40. R1004.4Unvented gas log heaters
  41. R1005.1Listing
  42. R1005.2Decorative shrouds
  43. R1005.3Solid-fuel appliances
  44. R1005.5Support
  45. R1006.1Exterior air
  46. R1006.2Exterior air intake
  47. R1006.3Clearance
  48. R1006.4Passageway

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IRC 2021 Chapter 10: Chimneys And Fireplaces — Model Code | BuildSpec