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• IBC 510.1

  General

  • Sections 510.2 to 510.9 allow special conditions that modify height and area limits; each stands alone.

  International Building Code, 2024 · Chapter 5, General Building Heights and AreasRead the full text (opens UpCodes in a new tab)

• IBC 510.2

  Horizontal building separation allowance

  • A 3-hour horizontal assembly over a sprinklered Type IA podium makes the parts above and below separate buildings ('podium'), with 2-hour shaft enclosures, A/B/M/R/S above, no H below, and height limited by the lower allowance.

  International Building Code, 2024 · Chapter 5, General Building Heights and AreasRead the full text (opens UpCodes in a new tab)

• IBC 510.3

  Group S-2 enclosed parking garage with Group S-2 open parking garage above

  • A one-story Type I/II enclosed garage under an open garage is a separate building for construction type, with area ratios ≤ 1, tiers per Table 406.5.4 and up to 1,000 sq ft of office/waiting/toilet.

  Works withIBC 406.5.4

  International Building Code, 2024 · Chapter 5, General Building Heights and AreasRead the full text (opens UpCodes in a new tab)

• IBC 510.4

  Parking beneath Group R

  • A one-story Type I (or open Type IV) garage under Group R lets stories for construction type be counted from the floor above the garage.

  Works withIBC 508.4

  International Building Code, 2024 · Chapter 5, General Building Heights and AreasRead the full text (opens UpCodes in a new tab)

• IBC 510.5

  Group R-1 and R-2 buildings of Type IIIA construction

  • Type IIIA R-1/R-2 gets +10 ft and +1 story with a 3-hour floor over the basement and 2-hour fire walls dividing areas of 3,000 sq ft or less.

  International Building Code, 2024 · Chapter 5, General Building Heights and AreasRead the full text (opens UpCodes in a new tab)

• IBC 510.6

  Group R-1 and R-2 buildings of Type IIA construction

  • Type IIA R-1/R-2 may go to 9 stories and 100 ft with 50 ft from other buildings, 2-hour exit enclosures and a 1½-hour first floor.

  International Building Code, 2024 · Chapter 5, General Building Heights and AreasRead the full text (opens UpCodes in a new tab)

• IBC 510.7

  Open parking garage beneath Groups A, I, B, M and R

  • An open garage under A, I, B, M or R follows 406.5 limits; the upper part follows 503, with height measured from grade including the garage.

  Works withIBC 406.5IBC 503

  International Building Code, 2024 · Chapter 5, General Building Heights and AreasRead the full text (opens UpCodes in a new tab)

• IBC 510.8

  Group B or M buildings with Group S-2 open parking garage above

  • B or M below an open garage of lesser type is a separate building with a 2-hour horizontal assembly, Type IA below (IB/II if one story), and garage exits discharging directly at grade.

  International Building Code, 2024 · Chapter 5, General Building Heights and AreasRead the full text (opens UpCodes in a new tab)

• IBC 510.9

  Multiple buildings above a horizontal assembly

  • Several buildings above a qualifying horizontal assembly are each separate buildings.

  Works withIBC 510.2IBC 510.3IBC 510.8

  International Building Code, 2024 · Chapter 5, General Building Heights and AreasRead the full text (opens UpCodes in a new tab)

• IBC 510.7.1

  Fire separation

  • Separate garage and upper occupancy per Table 508.4; supporting garage members carry the stricter rating; upper egress is enclosed by 2-hour barriers.

  Works withIBC 508.4IBC 601

  International Building Code, 2024 · Chapter 5, General Building Heights and AreasRead the full text (opens UpCodes in a new tab)

• IBC 406.4

  Public parking garages

  • Other garages are public, open (406.5) or enclosed (406.6); see 510 for special provisions.

  Works withIBC 406.5IBC 406.6IBC 510

  International Building Code, 2024 · Chapter 4, Special Detailed Requirements Based on Occupancy and UseRead the full text (opens UpCodes in a new tab)

• IBC 918.1

  General

  • New buildings provide two-way emergency responder radio coverage per IFC 510.

  Works withIFC

  International Building Code, 2024 · Chapter 9, Fire Protection and Life Safety SystemsRead the full text (opens UpCodes in a new tab)

• IBC 1510.1

  General

  • General scope for Section 1510.

  Works withIBC 1510.2IBC 1510.4

  International Building Code, 2024 · Chapter 15, Roof Assemblies and Rooftop StructuresRead the full text (opens UpCodes in a new tab)

• IBC 2510.1

  General

  • General scope for Section 2510.

  Works withIBC Table 2507.2IBC Chapter 35

  International Building Code, 2024 · Chapter 25, Gypsum Panel Products and PlasterRead the full text (opens UpCodes in a new tab)

• IBC 2510.6

  Water-resistive barriers

  • Stucco water-resistive barriers per 1403.2 plus 2510.6.1 or 2510.6.2.

  Works withIBC 1403.2IRC R703.7.3IBC 2510.6.1IBC 2510.6.2

  International Building Code, 2024 · Chapter 25, Gypsum Panel Products and PlasterRead the full text (opens UpCodes in a new tab)

• IBC 403.4.5

  Emergency communication coverage

  • Two-way emergency responder radio coverage per IFC 510.

  Works withIFC

  International Building Code, 2024 · Chapter 4, Special Detailed Requirements Based on Occupancy and UseRead the full text (opens UpCodes in a new tab)

• IBC 406.2.8

  Mixed occupancies and uses

  • Mixed uses with garages follow 508.1, and for open garages also 402.4.2.3, 406.5.11, 510.3, 510.4 and 510.7.

  Works withIBC 508.1IBC 510.3IBC 510.4IBC 510.7

  International Building Code, 2024 · Chapter 4, Special Detailed Requirements Based on Occupancy and UseRead the full text (opens UpCodes in a new tab)

• IBC 406.5.3

  Mixed occupancies and uses

  • Mixed uses follow 402.4.2.3, 406.5.11, 508.1, 510.3, 510.4 and 510.7.

  International Building Code, 2024 · Chapter 4, Special Detailed Requirements Based on Occupancy and UseRead the full text (opens UpCodes in a new tab)

• IBC 504.1.2

  Special provisions

  • Section 510 conditions can modify height limits.

  Works withIBC 510

  International Building Code, 2024 · Chapter 5, General Building Heights and AreasRead the full text (opens UpCodes in a new tab)

• IBC 506.1.2

  Special provisions

  • Section 510 conditions can modify area limits.

  Works withIBC 510

  International Building Code, 2024 · Chapter 5, General Building Heights and AreasRead the full text (opens UpCodes in a new tab)

• IBC 707.3.11

  Horizontal separation offsets

  • Vertical offsets in podium separations per 510.2.

  Works withIBC 510.2

  International Building Code, 2024 · Chapter 7, Fire and Smoke Protection FeaturesRead the full text (opens UpCodes in a new tab)

• IBC 1404.11.1.1

  Water-resistive barriers

  • Per 2510.6.

  Works withIBC 2510.6

  International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

• IBC 1404.11.1.5

  Adhered masonry veneer applied directly to masonry and concrete

  • Per 1404.11 plus 1404.11.1.4 or 2510.7.

  Works withIBC 2510.7

  International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

• IBC 1404.11.1.4.1

  Lathing

  • Per 2510.

  Works withIBC 2510

  International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

Searches all 4,276 IRC 2024 sections, 5,532 IBC 2024 sections and defined terms (Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33 so far) and each city's local rules as they are added. Section numbers and titles from the International Residential Code and International Building Code, 2024 editions, copyrighted by the International Code Council; the IRC's electrical chapters (34 to 43) follow NFPA 70, the National Electrical Code. Requirements are summarized in our words (IRC Chapters 3 to 43, IBC Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33); read the full text at the link on each result. Local values come from each city's published documents.