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2021 International Building Code (IBC) by International Code Council

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2021 International Building Code (IBC) by International Code Council

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, TABLE OF CONTENTS

CHAPTER 1 SCOPE AND 308 Institutional Group I . . . . . . . . . . . . . . . . . . . . . . . 3-8
ADMINISTRATION . . . . . . . . . . . . . . 1-1 309 Mercantile Group M . . . . . . . . . . . . . . . . . . . . . . . 3-9
310 Residential Group R . . . . . . . . . . . . . . . . . . . . . . 3-10
PART 1—SCOPE AND APPLICATION . . . . . . . . . . 1-1
311 Storage Group S . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Section
312 Utility and Miscellaneous Group U. . . . . . . . . . . 3-12
101 Scope and General Requirements . . . . . . . . . . . . . 1-1
102 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 CHAPTER 4 SPECIAL DETAILED
REQUIREMENTS BASED
PART 2—ADMINISTRATION AND ON OCCUPANCY AND USE . . . . . . 4-1
ENFORCEMENT . . . . . . . . . . . . . . . . . . . . 1-2 Section
103 Code Compliance Agency . . . . . . . . . . . . . . . . . . . 1-2 401 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
104 Duties and Powers of Building Official. . . . . . . . . 1-2 402 Covered Mall and Open Mall Buildings . . . . . . . . 4-1
105 Permits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 403 High-rise Buildings . . . . . . . . . . . . . . . . . . . . . . . . 4-5
106 Floor and Roof Design Loads . . . . . . . . . . . . . . . . 1-6 404 Atriums . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
107 Construction Documents . . . . . . . . . . . . . . . . . . . . 1-6 405 Underground Buildings . . . . . . . . . . . . . . . . . . . . . 4-9
108 Temporary Structures and Uses . . . . . . . . . . . . . . . 1-7 406 Motor-vehicle-related Occupancies . . . . . . . . . . 4-10
109 Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 407 Group I-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
110 Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 408 Group I-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
111 Certificate of Occupancy . . . . . . . . . . . . . . . . . . . . 1-9 409 Motion Picture Projection Rooms . . . . . . . . . . . . 4-21
112 Service Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 410 Stages, Platforms and Technical
113 Means of Appeals . . . . . . . . . . . . . . . . . . . . . . . . 1-10 Production Areas . . . . . . . . . . . . . . . . . . . . . . . 4-21
114 Violations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 411 Special Amusement Areas. . . . . . . . . . . . . . . . . . 4-23
115 Stop Work Order . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 412 Aircraft-related Occupancies. . . . . . . . . . . . . . . . 4-24
116 Unsafe Structures and Equipment . . . . . . . . . . . . 1-11 413 Combustible Storage . . . . . . . . . . . . . . . . . . . . . . 4-28
414 Hazardous Materials . . . . . . . . . . . . . . . . . . . . . . 4-28
CHAPTER 2 DEFINITIONS . . . . . . . . . . . . . . . . . . . 2-1 415 Groups H-1, H-2, H-3, H-4 and H-5 . . . . . . . . . . 4-32
Section 416 Spray Application of Flammable Finishes . . . . . 4-41
201 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 417 Drying Rooms . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42
202 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 418 Organic Coatings . . . . . . . . . . . . . . . . . . . . . . . . . 4-42
419 Artificial Decorative Vegetation . . . . . . . . . . . . . 4-42
CHAPTER 3 OCCUPANCY
420 Groups I-1, R-1, R-2, R-3 and R-4 . . . . . . . . . . . 4-42
CLASSIFICATION AND USE . . . . . . 3-1
421 Hydrogen Fuel Gas Rooms . . . . . . . . . . . . . . . . . 4-44
Section
422 Ambulatory Care Facilities . . . . . . . . . . . . . . . . . 4-44
301 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
423 Storm Shelters . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-45
302 Occupancy Classification and Use Designation . . 3-1
424 Play Structures. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-46
303 Assembly Group A . . . . . . . . . . . . . . . . . . . . . . . . 3-1
425 Hyperbaric Facilities . . . . . . . . . . . . . . . . . . . . . . 4-46
304 Business Group B . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
426 Combustible Dusts,
305 Educational Group E . . . . . . . . . . . . . . . . . . . . . . . 3-3
Grain Processing and Storage . . . . . . . . . . . . . 4-46
306 Factory Group F. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
427 Medical Gas Systems . . . . . . . . . . . . . . . . . . . . . 4-47
307 High-hazard Group H . . . . . . . . . . . . . . . . . . . . . . 3-4
428 Higher Education Laboratories . . . . . . . . . . . . . . 4-48




2021 INTERNATIONAL BUILDING CODE® xxiii

,TABLE OF CONTENTS



CHAPTER 5 GENERAL BUILDING 721 Prescriptive Fire Resistance . . . . . . . . . . . . . . . . .7-40
HEIGHTS AND AREAS . . . . . . . . . . . 5-1 722 Calculated Fire Resistance . . . . . . . . . . . . . . . . . .7-65
Section
501 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 CHAPTER 8 INTERIOR FINISHES . . . . . . . . . . . . .8-1
502 Building Address . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Section
503 General Building Height and Area Limitations. . . 5-1 801 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
504 Building Height and Number of Stories . . . . . . . . 5-2 802 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
505 Mezzanines and Equipment Platforms . . . . . . . . . 5-2 803 Wall and Ceiling Finishes . . . . . . . . . . . . . . . . . . . .8-1
506 Building Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6 804 Interior Floor Finish . . . . . . . . . . . . . . . . . . . . . . . .8-4
507 Unlimited Area Buildings . . . . . . . . . . . . . . . . . . . 5-9 805 Combustible Materials in Types I
508 Mixed Use and Occupancy . . . . . . . . . . . . . . . . . 5-12 and II Construction . . . . . . . . . . . . . . . . . . . . . . .8-5
509 Incidental Uses . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14 806 Decorative Materials and Trim . . . . . . . . . . . . . . . .8-5
510 Special Provisions . . . . . . . . . . . . . . . . . . . . . . . . 5-15 807 Insulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-6
808 Acoustical Ceiling Systems. . . . . . . . . . . . . . . . . . .8-6
CHAPTER 6 TYPES OF CONSTRUCTION. . . . . . 6-1
Section CHAPTER 9 FIRE PROTECTION
AND LIFE SAFETY SYSTEMS . . . . .9-1
601 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Section
602 Construction Classification . . . . . . . . . . . . . . . . . . 6-1
901 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
603 Combustible Material in
Types I and II Construction . . . . . . . . . . . . . . . . 6-5 902 Fire Pump and Riser Room Size . . . . . . . . . . . . . . .9-2
903 Automatic Sprinkler Systems . . . . . . . . . . . . . . . . .9-2
CHAPTER 7 FIRE AND SMOKE 904 Alternative Automatic
PROTECTION FEATURES. . . . . . . . 7-1 Fire-extinguishing Systems . . . . . . . . . . . . . . . . .9-9
Section 905 Standpipe Systems . . . . . . . . . . . . . . . . . . . . . . . .9-11
701 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 906 Portable Fire Extinguishers . . . . . . . . . . . . . . . . . .9-14
702 Multiple-use Fire Assemblies . . . . . . . . . . . . . . . . 7-1 907 Fire Alarm and Detection Systems . . . . . . . . . . . .9-16
703 Fire-resistance Ratings and Fire Tests . . . . . . . . . . 7-1 908 Emergency Alarm Systems . . . . . . . . . . . . . . . . . .9-27
704 Fire-resistance Rating of Structural Members. . . . . 7-2 909 Smoke Control Systems . . . . . . . . . . . . . . . . . . . .9-27
705 Exterior Walls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4 910 Smoke and Heat Removal . . . . . . . . . . . . . . . . . . .9-36
706 Fire Walls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9 911 Fire Command Center . . . . . . . . . . . . . . . . . . . . . .9-37
707 Fire Barriers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-12 912 Fire Department Connections . . . . . . . . . . . . . . . .9-39
708 Fire Partitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13 913 Fire Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-39
709 Smoke Barriers . . . . . . . . . . . . . . . . . . . . . . . . . . 7-15 914 Emergency Responder Safety Features. . . . . . . . .9-40
710 Smoke Partitions . . . . . . . . . . . . . . . . . . . . . . . . . 7-16 915 Carbon Monoxide Detection . . . . . . . . . . . . . . . . .9-40
711 Floor and Roof Assemblies . . . . . . . . . . . . . . . . . 7-16 916 Gas Detection Systems . . . . . . . . . . . . . . . . . . . . .9-42
712 Vertical Openings . . . . . . . . . . . . . . . . . . . . . . . . 7-17 917 Mass Notification Systems . . . . . . . . . . . . . . . . . .9-42
713 Shaft Enclosures . . . . . . . . . . . . . . . . . . . . . . . . . 7-19 918 Emergency Responder
714 Penetrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-20 Communication Coverage. . . . . . . . . . . . . . . . .9-42
715 Joints and Voids. . . . . . . . . . . . . . . . . . . . . . . . . . 7-23
CHAPTER 10 MEANS OF EGRESS . . . . . . . . . . . .10-1
716 Opening Protectives. . . . . . . . . . . . . . . . . . . . . . . 7-24
Section
717 Ducts and Air Transfer Openings . . . . . . . . . . . . 7-31
1001 Administration . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1
718 Concealed Spaces . . . . . . . . . . . . . . . . . . . . . . . . 7-37
1002 Maintenance and Plans. . . . . . . . . . . . . . . . . . . . .10-1
719 Fire-resistance Requirements for Plaster . . . . . . . 7-39
1003 General Means of Egress . . . . . . . . . . . . . . . . . . .10-1
720 Thermal- and Sound-insulating Materials . . . . . . 7-39
1004 Occupant Load . . . . . . . . . . . . . . . . . . . . . . . . . . .10-2



xxiv 2021 INTERNATIONAL BUILDING CODE®

, TABLE OF CONTENTS



1005 Means of Egress Sizing. . . . . . . . . . . . . . . . . . . . 10-4 CHAPTER 12 INTERIOR ENVIRONMENT . . . . 12-1
1006 Number of Exits and Section
Exit Access Doorways . . . . . . . . . . . . . . . . . . 10-5 1201 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1
1007 Exit and Exit Access 1202 Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1
Doorway Configuration . . . . . . . . . . . . . . . . . 10-8
1203 Temperature Control . . . . . . . . . . . . . . . . . . . . . 12-4
1008 Means of Egress Illumination . . . . . . . . . . . . . . . 10-9
1204 Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-4
1009 Accessible Means of Egress . . . . . . . . . . . . . . . 10-10
1205 Yards or Courts . . . . . . . . . . . . . . . . . . . . . . . . . 12-4
1010 Doors, Gates and Turnstiles . . . . . . . . . . . . . . . 10-12
1206 Sound Transmission . . . . . . . . . . . . . . . . . . . . . . 12-5
1011 Stairways. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-22
1207 Enhanced Classroom Acoustics . . . . . . . . . . . . . 12-5
1012 Ramps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-26
1208 Interior Space Dimensions . . . . . . . . . . . . . . . . . 12-5
1013 Exit Signs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-27
1209 Access to Unoccupied Spaces . . . . . . . . . . . . . . 12-6
1014 Handrails . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-28
1210 Toilet and Bathroom Requirements . . . . . . . . . . 12-6
1015 Guards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-29
1016 Exit Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-31 CHAPTER 13 ENERGY EFFICIENCY. . . . . . . . . . 13-1
1017 Exit Access Travel Distance . . . . . . . . . . . . . . . 10-31 Section
1018 Aisles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-33 1301 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1
1019 Exit Access Stairways and Ramps . . . . . . . . . . 10-33
1020 Corridors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-34 CHAPTER 14 EXTERIOR WALLS . . . . . . . . . . . . 14-1
1021 Egress Balconies . . . . . . . . . . . . . . . . . . . . . . . . 10-35 Section
1022 Exits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-35 1401 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1
1023 Interior Exit Stairways and Ramps . . . . . . . . . . 10-36 1402 Performance Requirements . . . . . . . . . . . . . . . . 14-1
1024 Exit Passageways . . . . . . . . . . . . . . . . . . . . . . . 10-38 1403 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-2
1025 Luminous Egress Path Markings . . . . . . . . . . . 10-39 1404 Installation of Wall Coverings . . . . . . . . . . . . . . 14-3
1026 Horizontal Exits . . . . . . . . . . . . . . . . . . . . . . . . 10-40 1405 Combustible Materials on the
1027 Exterior Exit Stairways and Ramps . . . . . . . . . 10-41 Exterior Side of Exterior Walls . . . . . . . . . . . 14-9
1028 Exit Discharge. . . . . . . . . . . . . . . . . . . . . . . . . . 10-42 1406 Metal Composite Materials (MCM). . . . . . . . . 14-10
1029 Egress Courts . . . . . . . . . . . . . . . . . . . . . . . . . . 10-43 1407 Exterior Insulation and
Finish Systems (EIFS) . . . . . . . . . . . . . . . . . 14-10
1030 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-43
1408 High-pressure Decorative Exterior-grade
1031 Emergency Escape and Rescue. . . . . . . . . . . . . 10-50
Compact Laminates (HPL). . . . . . . . . . . . . . 14-11
1409 Plastic Composite Decking . . . . . . . . . . . . . . . 14-12
CHAPTER 11 ACCESSIBILITY . . . . . . . . . . . . . . . 11-1
Section
CHAPTER 15 ROOF ASSEMBLIES AND
1101 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1 ROOFTOP STRUCTURES . . . . . . 15-1
1102 Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1 Section
1103 Scoping Requirements . . . . . . . . . . . . . . . . . . . . 11-1 1501 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-1
1104 Accessible Route. . . . . . . . . . . . . . . . . . . . . . . . . 11-2 1502 Roof Drainage . . . . . . . . . . . . . . . . . . . . . . . . . . 15-1
1105 Accessible Entrances . . . . . . . . . . . . . . . . . . . . . 11-3 1503 Weather Protection . . . . . . . . . . . . . . . . . . . . . . . 15-1
1106 Parking and Passenger Loading Facilities . . . . . 11-4 1504 Performance Requirements . . . . . . . . . . . . . . . . 15-2
1107 Motor-vehicle-related Facilities . . . . . . . . . . . . . 11-5 1505 Fire Classification. . . . . . . . . . . . . . . . . . . . . . . . 15-3
1108 Dwelling Units and Sleeping Units . . . . . . . . . . 11-5 1506 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-4
1109 Special Occupancies . . . . . . . . . . . . . . . . . . . . . . 11-9 1507 Requirements for Roof Coverings . . . . . . . . . . . 15-4
1110 Other Features and Facilities . . . . . . . . . . . . . . 11-11 1508 Roof Insulation . . . . . . . . . . . . . . . . . . . . . . . . . 15-16
1111 Recreational Facilities. . . . . . . . . . . . . . . . . . . . 11-15 1509 Roof Coatings. . . . . . . . . . . . . . . . . . . . . . . . . . 15-16
1112 Signage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-17 1510 Radiant Barriers Installed Above Deck . . . . . . 15-17



2021 INTERNATIONAL BUILDING CODE® xxv
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