INTERNATIONAL CODE INTERPRETATIONS

Transcription

1 2012 INTERNATIONAL CODE INTERPRETATIONS

2 PREFACE The 2012 International Codes promulgated by the International Code Council (ICC ) comprise a comprehensive set of model regulations for the construction and maintenance of safe buildings and structures. As a result of the performance nature of the International Codes, interpretations of the code provisions as they apply to a specific situation are sometimes necessary. Interpretation of the International Codes is a regular service offered to ICC members and is intended to be of an advisory nature, with final responsibility resting with the appropriate code official. In the development of this document, a review of ICC or Legacy Code Committee Interpretations published to date was conducted. Those Interpretations that are no longer applicable because of changes in the code text since the 2000 editions of the ICC International Codes were omitted. Those in which the essential interpretative issue is still relevant to the 2012 editions were edited by ICC technical staff and revised as necessary for applicability. The interpretations appearing in this book are in consecutive order according to code and section number. Applicable 2012 International Code text is included with each interpretation INTERNATIONAL CODE INTERPRETATIONS iii

3 International Building Code CHAPTER 1 SCOPE AND ADMINISTRATION 101 GENERAL Scope Referenced codes Gas Mechanical Plumbing Property maintenance Fire prevention Energy DUTIES AND POWERS OF BUILDING OFFICIAL General Department records Approved materials and equipment Modifications PERMITS Required Validity of permit Expiration SUBMITTAL DOCUMENTS General Approval of construction documents Design professional in responsible charge Amended construction documents BOARD OF APPEALS Limitations on authority CHAPTER 2 DEFINITIONS 202 DEFINITIONS CHAPTER 3 USE AND OCCUPANCY CLASSIFICATION 303 ASSEMBLY GROUP A Assembly Group A Small buildings and tenant spaces Small assembly spaces Associated with Group E occupancies Accessory to places of religious worship Assembly Group A Assembly Group A Assembly Group A Assembly Group A Assembly Group A HIGH-HAZARD GROUP H High-hazard Group H INSTITUTIONAL GROUP I Institutional Group I Five or fewer persons receiving care Six to 16 persons receiving care Group I Five or fewer persons receiving care Group I MERCANTILE GROUP M Mercantile Group M UTILITY AND MISCELLANEOUS GROUP U General CHAPTER 4 SPECIAL DETAILED REQUIREMENTS BASED ON USE AND OCCUPANCY 402 COVERED MALL AND OPEN MALL BUILDINGS Tenant separations Anchor building separation Openings between anchor building and mall Kiosks Mall width Minimum width HIGH-RISE BUILDINGS Applicability Reduction in fire-resistance rating ATRIUMS INTERNATIONAL CODE INTERPRETATIONS v

4 404.1 General Enclosure of atriums MOTOR-VEHICLE-RELATED OCCUPANCIES Means of egress Enclosure of vertical openings GROUP I Other occupancies HAZARDOUS MATERIALS Percentage of maximum allowable quantities Fire-resistance-rating requirements Table Explosion control GROUPS H-1, H-2, H-3, H-4 AND H Special provisions for Group H-1 occupancies Grinding rooms CHAPTER 5 GENERAL BUILDING HEIGHTS AND AREAS 503 GENERAL BUILDING HEIGHT AND AREA LIMITATIONS Buildings on same lot MEZZANINES Area limitation Openness BUILDING AREA MODIFICATIONS General Frontage increase Area determination UNLIMITED AREA BUILDINGS General Nonsprinklered, one story Sprinklered, one story Mixed occupancy buildings with Groups A-1 and A Two story Group H occupancies Allowable area MIXED USE AND OCCUPANCY General Accessory occupancies Separation INCIDENTAL USES Separation and protection SPECIAL PROVISIONS Open parking garage beneath Groups A, I, B, M and R CHAPTER 6 TYPES OF CONSTRUCTION 602 CONSTRUCTION CLASSIFICATION General Minimum requirements Type III COMBUSTIBLE MATERIAL IN TYPE I AND II CONSTRUCTION Allowable materials CHAPTER 7 FIRE AND SMOKE PROTECTION FEATURES 703 FIRE-RESISTANCE RATING AND FIRE TESTS Fire-resistance ratings Restrained classification FIRE-RESISTANCE RATING OF STRUCTURAL MEMBERS Requirements Embedments and enclosures EXTERIOR WALLS Openings Allowable area of openings Vertical exposure FIRE WALLS Structural stability FIRE BARRIERS Exterior walls Supporting construction FIRE PARTITIONS General Fire-resistance rating Continuity HORIZONTAL ASSEMBLIES Unusable space vi 2012 INTERNATIONAL CODE INTERPRETATIONS

5 711.4 Continuity SHAFT ENCLOSURES Elevator lobby PENETRATIONS Membrane penetrations FIRE-RESISTANT JOINT SYSTEMS General OPENING PROTECTIVES Fire door and shutter assemblies Side-hinged or pivoted swinging doors THERMAL- AND SOUND-INSULATING MATERIALS Insulation and covering on pipe and tubing CHAPTER 8 INTERIOR FINISHES 803 WALL AND CEILING FINISHES Interior wall and ceiling finish materials Interior finish requirements based on group DECORATIVE MATERIALS AND TRIM Combustible decorative materials Interior trim CHAPTER 9 FIRE PROTECTION SYSTEMS 903 AUTOMATIC SPRINKLER SYSTEMS Group A Stories without openings NFPA 13R sprinkler systems Alarms STANDPIPE SYSTEMS Height FIRE ALARM AND DETECTION SYSTEMS Group I Group I Groups R-2, R-3, R-4 and I Audible alarms Average sound pressure Emergency voice/alarm communication systems Visible alarms CHAPTER 10 MEANS OF EGRESS 1003 GENERAL MEANS OF EGRESS Applicability Floor surface OCCUPANT LOAD Areas without fixed seating DOORS, GATES AND TURNSTILES Doors Size of doors Door swing Power-operated doors Horizontal sliding doors Door operations Locks and latches Delayed egress locks Access-controlled egress doors Panic and fire exit hardware STAIRWAYS Headroom Stairway landings EXIT SIGNS Illumination HANDRAILS Continuity GUARDS Where required Opening limitations EXIT AND EXIT ACCESS DOORWAYS Exits or exit access doorways from spaces Two exits or exit access doorways CORRIDORS Construction Width Dead ends Air movement in corridors Corridor continuity INTERNATIONAL CODE INTERPRETATIONS vii

6 1022 INTERIOR EXIT STAIRWAYS AND RAMPS Openings Penetrations Ventilation EXIT PASSAGEWAYS Exit passageway EXTERIOR EXIT RAMPS AND STAIRWAYS Exterior exit stairways and ramps Exterior stairway and ramp protection EXIT DISCHARGE General Exit discharge capacity ASSEMBLY Assembly main exit EMERGENCY ESCAPE AND RESCUE General Minimum size CHAPTER 11 ACCESSIBILITY 1103 SCOPING REQUIREMENTS Where required General exceptions ACCESSIBLE ROUTE Multilevel buildings and facilities PARKING AND PASSENGER LOADING FACILITIES Groups R-2 and R CHAPTER 12 INTERIOR ENVIRONMENT 1208 INTERIOR SPACE DIMENSIONS Minimum ceiling heights CHAPTER 14 EXTERIOR WALLS 1403 PERFORMANCE REQUIREMENTS Weather protection INSTALLATION OF WALL COVERINGS Flashing COMBUSTIBLE MATERIALS ON THE EXTERIOR SIDE OF EXTERIOR WALLS Type I, II, III and IV construction Location CHAPTER 15 ROOF ASSEMBLIES AND ROOFTOP STRUCTURES 1503 WEATHER PROTECTION Flashing Locations ROOFTOP STRUCTURES Penthouses Height above roof deck Area limitation Use limitations CHAPTER 16 STRUCTURAL DESIGN 1605 LOAD COMBINATIONS Basic load combinations Alternative basic load combinations LIVE LOADS Table Minimum uniformly distributed live loads, L o, and minimum concentrated live loads Uniform live loads Reduction in live loads Interior walls and partitions WIND LOADS Applications RAIN LOADS Controlled drainage FLOOD LOADS General Establishment of flood hazard areas CHAPTER 17 STRUCTURAL TESTS AND SPECIAL INSPECTIONS 1710 PRECONSTRUCTION LOAD TESTS Exterior windows and doors viii 2012 INTERNATIONAL CODE INTERPRETATIONS

7 CHAPTER 23 WOOD 2303 MINIMUM STANDARDS AND QUALITY Wood structural panels Strength adjustments GENERAL CONSTRUCTION REQUIREMENTS Wall sheathing Wood structural panel sheathing Wood supported by exterior foundation walls Sleepers and sills CHAPTER 24 GLASS AND GLAZING 2405 SLOPED GLAZING AND SKYLIGHTS Screening Unit skylights SAFETY GLAZING Hazardous locations Glazing in doors Glazing adjacent to doors Glazing in windows Glazing in guards and railings Glazing and wet surfaces Glazing adjacent to stairs and ramps Glazing adjacent to the bottom stair landing CHAPTER 26 PLASTIC 2603 FOAM PLASTIC INSULATION Surface-burning characteristics CHAPTER 27 ELECTRICAL 2701 GENERAL Scope CHAPTER 29 PLUMBING SYSTEMS 2902 MINIMUM PLUMBING FACILITIES Separate facilities CHAPTER 30 ELEVATORS AND CONVEYING SYSTEMS 3005 CONVEYING SYSTEMS General CHAPTER 31 SPECIAL CONSTRUCTION 3102 MEMBRANE STRUCTURES General TEMPORARY STRUCTURES Permit required SWIMMING POOL ENCLOSURES AND SAFETY DEVICES Residential swimming pools Barrier height and clearances Dwelling wall as a barrier CHAPTER 33 SAFEGUARDS DURING CONSTRUCTION 3301 GENERAL Scope CHAPTER 34 EXISTING STRUCTURES 3401 GENERAL Maintenance CHANGE OF OCCUPANCY Conformance HISTORIC BUILDINGS Historic buildings COMPLIANCE ALTERNATIVES Additions APPENDIX D FIRE DISTRICTS D102 BUILDING RESTRICTIONS D102.1 Types of construction permitted D102.2 Other specific requirements D Exterior walls INTERNATIONAL CODE INTERPRETATIONS ix

8 International Residential Code Part 1 Administrative CHAPTER 1 SCOPE AND ADMINISTRATION R101 GENERAL R101.2 Scope R102 APPLICABILITY R102.7 Existing structures R Additions, alterations or repairs R105 PERMITS R Determination of substantially improved or substantially damaged existing buildings in flood hazard areas Part III Building Planning and Construction CHAPTER 3 BUILDING PLANNING R302 FIRE-RESISTANT CONSTRUCTION R302.2 Townhouses R302.3 Two-family dwellings R308 GLAZING R308.4 Hazardous locations R Glazing in doors R Glazing adjacent doors R Glazing in windows R Glazing in guards and railings R Glazing and wet surfaces R Glazing adjacent stairs and ramps R Glazing adjacent to the bottom stair landing R310 EMERGENCY ESCAPE AND RESCUE OPENINGS R310.1 Emergency escape and rescue required R311 MEANS OF EGRESS R Floor elevations at the required egress doors R Winder treads R316 FOAM PLASTIC R Crawl spaces CHAPTER 4 FOUNDATIONS R408 UNDER-FLOOR SPACE R408.3 Unvented crawl space CHAPTER 5 FLOORS R502 WOOD FLOOR FRAMING R502.7 Lateral restraint at supports CHAPTER 6 WALL CONSTRUCTION R602 WOOD WALL FRAMING R Drilling and notching of top plate CHAPTER 8 ROOF-CEILING CONSTRUCTION R801 GENERAL R801.3 Roof drainage CHAPTER 11 ENERGY EFFICIENCY N1101 GENERAL N Fenestration product rating Part V Mechanical CHAPTER 16 DUCT SYSTEMS M1601 DUCT CONSTRUCTION M Duct design M Above-ground duct systems Part VII Plumbing CHAPTER 31 VENTS P3101 VENT SYSTEMS P Venting required P3112 ISLAND FIXTURE VENTING P Vent connection APPENDIX G SWIMMING POOLS, SPAS AND HOT TUBS AG102 DEFINITIONS x 2012 INTERNATIONAL CODE INTERPRETATIONS

9 International Fire Code CHAPTER 1 SCOPE AND ADMINISTRATION 102 APPLICABILITY Construction and design provisions Application of building code UNSAFE BUILDINGS General CHAPTER 2 DEFINITIONS 202 GENERAL DEFINITIONS CHAPTER 5 FIRE SERVICE FEATURES 503 FIRE APPARATUS ACCESS ROADS Where required Buildings and facilities Surface FIRE PROTECTION WATER SUPPLIES Required water supply CHAPTER 6 BUILDING SERVICES AND SYSTEMS 605 ELECTRICAL EQUIPMENT, WIRING AND HAZARDS Appliances CHAPTER 8 INTERIOR FINISH, DECORATIVE MATERIALS AND FURNISHINGS 803 INTERIOR WALL AND CEILING FINISH AND TRIM IN EXISTING BUILDINGS Interior finish requirements based on occupancy CHAPTER 9 FIRE PROTECTION SYSTEMS 903 AUTOMATIC SPRINKLER SYSTEMS Group A Stories without openings NFPA 13R sprinkler systems Alarms STANDPIPE SYSTEMS Height FIRE ALARM AND DETECTION SYSTEMS Group I Group I Groups R-2, R-3, R-4 and I Audible alarms Average sound pressure Emergency voice/alarm communication systems Visible alarms CHAPTER 10 MEANS OF EGRESS 1003 GENERAL MEANS OF EGRESS Applicability Floor surface OCCUPANT LOAD Areas without fixed seating DOORS, GATES AND TURNSTILES Doors Size of doors Door swing Power-operated doors Horizontal sliding doors Door operations Locks and latches Delayed egress locks Access-controlled egress doors Panic and fire exit hardware STAIRWAYS Headroom Stairway landings EXIT SIGNS Illumination HANDRAILS Continuity GUARDS Where required Opening limitations INTERNATIONAL CODE INTERPRETATIONS xi

10 1015 EXIT AND EXIT ACCESS DOORWAYS Exits or exit access doorways from spaces Two exits or exit access doorways CORRIDORS Construction Width Dead ends Air movement in corridors Corridor continuity INTERIOR EXIT STAIRWAYS AND RAMPS Openings Penetrations Ventilation EXIT PASSAGEWAYS Exit passageway EXTERIOR EXIT STAIRWAYS AND RAMPS Exterior exit stairways and ramps Exterior ramps and stairway protection EXIT DISCHARGE General Exit discharge capacity ASSEMBLY Assembly main exit EMERGENCY ESCAPE AND RESCUE General Minimum size CHAPTER 32 HIGH-PILED COMBUSTIBLE STORAGE 3206 GENERAL FIRE PROTECTION AND LIFE SAFETY FEATURES Number of doors required Aisles CHAPTER 50 HAZARDOUS MATERIALS GENERAL PROVISIONS 5003 GENERAL REQUIREMENTS Maximum allowable quantity per control area Required detached buildings Percentage of maximum allowable quantities APPENDIX B FIRE-FLOW REQUIREMENTS FOR BUILDINGS B101 GENERAL B101.1 Scope APPENDIX C FIRE HYDRANT LOCATIONS AND DISTRIBUTION C101 GENERAL C101.1 Scope APPENDIX D FIRE APPARATUS ACCESS ROADS D101 GENERAL D101.1 Scope International Mechanical Code CHAPTER 3 GENERAL REGULATIONS 304 INSTALLATION Elevation of ignition source Construction and protection CHAPTER 4 VENTILATION 401 GENERAL When required MECHANICAL VENTILATION Recirculation of air CHAPTER 5 EXHAUST SYSTEMS 507 COMMERCIAL KITCHEN HOODS Where required HAZARDOUS EXHAUST SYSTEMS Where required xii 2012 INTERNATIONAL CODE INTERPRETATIONS

11 CHAPTER 6 DUCT SYSTEMS 601 GENERAL Air movement in egress elements PLENUMS Materials within plenums DUCT CONSTRUCTION AND INSTALLATION Underground ducts SMOKE DETECTION SYSTEMS CONTROL Return air systems CHAPTER 8 CHIMNEYS AND VENTS 804 DIRECT-VENT, INTEGRAL VENT AND MECHANICAL DRAFT SYSTEMS Horizontal terminations Vertical terminations CHAPTER 10 BOILERS, WATER HEATERS AND PRESSURE VESSELS 1006 SAFETY AND PRESSURE RELIEF VALVES AND CONTROLS Installation CHAPTER 11 REFRIGERATION 1104 SYSTEM APPLICATION REQUIREMENTS Machinery room Industrial occupancies and refrigerated rooms International Fuel Gas Code CHAPTER 1 SCOPE AND ADMINISTRATION 107 INSPECTIONS AND TESTING Approved inspection agencies Testing CHAPTER 3 GENERAL REGULATIONS 305 INSTALLATION Elevation of ignition source CHAPTER 4 GAS PIPING INSTALLATIONS 409 SHUTOFF VALVES Prohibited locations FLOW CONTROLS Venting of regulators APPLIANCE AND MANUFACTURED HOME CONNECTIONS Connecting appliances International Plumbing Code CHAPTER 4 FIXTURES, FAUCETS AND FIXTURE FITTINGS 403 MINIMUM PLUMBING FACILITIES Separate facilities CHAPTER 6 WATER SUPPLY AND DISTRIBUTION 608 PROTECTION OF POTABLE WATER SUPPLY Connections subject to backpressure CHAPTER 10 TRAPS, INTERCEPTORS AND SEPARATORS 1003 INTERCEPTORS AND SEPARATORS Oil separators required Separation of liquids Oil separator design General design requirements Garages and service stations INTERNATIONAL CODE INTERPRETATIONS xiii

12 International Existing Building Code CHAPTER 2 DEFINITIONS 202 GENERAL DEFINITIONS CHAPTER 14 PERFORMANCE COMPLIANCE METHODS 1401 GENERAL Additions International Energy Conservation Code CHAPTER 3 [CE] GENERAL REQUIREMENTS C303 MATERIALS, SYSTEMS AND EQUIPMENT C Fenestration product rating CHAPTER 3 [RE] GENERAL REQUIREMENTS R303 MATERIALS, SYSTEMS AND EQUIPMENT R Fenestration product rating xiv 2012 INTERNATIONAL CODE INTERPRETATIONS