What are the two major model building codes currently used in the United States?

What are the two major model building codes currently used in the United States?

• A. NFPA 5000 and the International Code Council's (ICC) International Building Codes (IBC)
• B. NFPA 101 and the North American Building Standards Association (NABSA)
• C. The Department of Housing and Urban Development's (HUD) Federal Fire Safety Building Codes 29 CFR 1910 and the North American Standards Council (NASC)
• D. The International Organization for Standardization, Technical Committee, Subcommittee (ISO/TC/SC) 4: Fire Safety Engineering Standards and NFPA 1500

Answer: (A)

The main concept here is identifying the two frameworks that most U.S. jurisdictions rely on to regulate building design and construction. The two major model building codes used in the United States are the International Building Code (IBC), developed by the International Code Council, and NFPA 5000 Building Construction and Safety Code, published by the National Fire Protection Association. The IBC has become the dominant code across most states and municipalities, providing a comprehensive set of requirements for structural safety, fire protection, life safety, accessibility, and egress in new construction and major renovations. NFPA 5000 remains a widely recognized alternative that covers similar topics, and a number of jurisdictions still adopt it as their primary code or use it in parallel with the IBC. Together, they form the main building code framework used in the U.S. Other items don’t fit as the two major building codes because NFPA 101 is the Life Safety Code, focusing specifically on life-safety features rather than the full spectrum of construction requirements; HUD’s 29 CFR 1910 is an OSHA occupational safety standard, not a building code; ISO/TC/SC 4 represents international standards rather than the dominant U.S. model codes; NFPA 1500 is an occupational safety standard for fire departments, not a general building code; NABSA isn’t a recognized model building code authority for U.S. construction.

The main concept here is identifying the two frameworks that most U.S. jurisdictions rely on to regulate building design and construction. The two major model building codes used in the United States are the International Building Code (IBC), developed by the International Code Council, and NFPA 5000 Building Construction and Safety Code, published by the National Fire Protection Association. The IBC has become the dominant code across most states and municipalities, providing a comprehensive set of requirements for structural safety, fire protection, life safety, accessibility, and egress in new construction and major renovations. NFPA 5000 remains a widely recognized alternative that covers similar topics, and a number of jurisdictions still adopt it as their primary code or use it in parallel with the IBC. Together, they form the main building code framework used in the U.S.

Other items don’t fit as the two major building codes because NFPA 101 is the Life Safety Code, focusing specifically on life-safety features rather than the full spectrum of construction requirements; HUD’s 29 CFR 1910 is an OSHA occupational safety standard, not a building code; ISO/TC/SC 4 represents international standards rather than the dominant U.S. model codes; NFPA 1500 is an occupational safety standard for fire departments, not a general building code; NABSA isn’t a recognized model building code authority for U.S. construction.