2021 International Existing Building Code – ICC IEBC-2021

2021 International Existing Building Code® (IEBC)

Scope:
The 2021 International Existing Building Code® (IEBC) provides a consistent, performance-based framework for the repair, alteration, addition, and change of occupancy of existing structures—including historic buildings. It promotes the reuse of existing buildings while achieving appropriate levels of safety without requiring full compliance with new construction standards in the I-Codes.

Key Updates in the 2021 IEBC:

• Storm Shelters:
  Required occupant capacity is limited to the total load of classrooms, vocational rooms, and offices. The maximum travel distance requirement has been removed.
• Exterior Wall Modifications:
  When significant portions of the exterior wall envelope are added or replaced, compliance with IBC Chapters 14 and 26 is now required.
• Snow Load Requirements:
  Snow loads must be addressed in repairs involving substantial structural damage, regardless of whether the original damage was caused by snow.
• Classroom Acoustics (Group E):
  Additions, Level 3 alterations, and occupancy changes in educational buildings must now meet enhanced classroom acoustic standards per Section 808 of ICC A117.1.
• Roof Equipment Loads:
  New provisions allow additional equipment on roofs without a full structural analysis if each unit weighs under 400 lbs and represents less than 10% of the total roof dead load.
• Seismic Evaluation (Occupancy Change):
  A seismic analysis is required when changing occupancy from Group S or U to another occupancy classification.
• Permit Exemptions for Furniture:
  Freestanding furniture items (e.g., cubicles, reception desks, bookcases) are exempt from permit and not considered Level 2 alterations.
• Sprinkler Requirements:
  Revised criteria for sprinkler systems in Level 2 and Level 3 alterations, especially in areas of higher hazard.