ETCM 2640 - Video Lecture - 9/11/25

Building codes: national/international minimum standards to protect health and safety.
Regulatory requirements (zoning): local rules that govern land use, density, setbacks, and appearance.
Codes set safety baselines; zoning can affect what the building looks like and where it can be placed.

Minimum standards can be exceeded; you may build with a higher fire rating or better materials.
Codes do not dictate exterior design aesthetics, but can constrain design through safety limitations (e.g., penetrations in a fire-rated wall).
Codes are enforced by an Authority Having Jurisdiction (AHJ) (often the inspector); not always perfectly impartial in practice.
“Impartial authority” phrasing in the course is technical; ultimately AHJ enforces code compliance.

AHJ: Inspector or authority overseeing code compliance; there can be multiple layers (local, state).
Code compliance loops: architect designs to meet codes; contractor builds to meet those codes; inspectors verify.
Liability focus: codes aim to reduce risk of lawsuits by ensuring safety and durability.

Life safety and fire safety
Structural safety
Health and welfare (ventilation, lighting, sanitation, indoor climate)
Property protection (durability and longevity of the building)
All components and systems—from walls and stairs to handrails and electrical/mechanical/plumbing

Fire rating depends on occupancy/type of use; higher risk uses require higher ratings (e.g., hospitals vs small offices).
Example: hospital walls may require a higher rating than small office walls; not about how fast materials burn but how long occupants can exit safely.
Means of egress: paths for exiting in an emergency; includes exit access, exits, and exit discharge; depth and configuration influence egress design.
Handrails, stair dimensions, and baluster spacing are tightly regulated (e.g., typical stairs: $7''\text{ rise}, 11''\text{ run}$ ; baluster spacing such that a $4''\text{ sphere}$ cannot pass through).

Structural safety: carries the load safely; most code focus is on structural integrity.
Fire protection, smoke protection, and means of egress are major safety concerns across construction types.
Materials must be tested and certified (e.g., UL, ASTM, ANSI) by recognized labs.

International Building Code (IBC): overarching framework used by many jurisdictions; current widely used version is $IBC\,2018$ ; some places still reference earlier versions (e.g., $IBC\,2012$ ) for reference.
IBC scopes: building envelope, structural systems, non-structural building services (electrical, mechanical, plumbing).
When conflicts arise, higher-level codes (e.g., IBC/International Code) prevail over local ordinances.
Chattanooga example: form-based code used in some areas, in addition to IBC 2018 base.

IBC (International Building Code): core structural, fire, egress, and accessibility requirements.
Other codes: plumbing, electrical, mechanical, International Fire Code, International Energy Conservation Code, etc.
Codes evolve after significant failures or disasters to address observed shortcomings.

National/International codes provide safety baselines; local zoning controls land use, density, and appearance.
Zoning types and terms: occupancy categories (e.g., Institutional, Assembly, Business) influence which codes apply.
Examples: Fort Wood and Downtown Chattanooga illustrate local zoning rules and historic preservation constraints.

Control total floor area, building height, setbacks, and parking requirements.
Influence urban form and density; parking might be mandated per unit in apartments.
Height limits and density depend on location within the city (e.g., downtown vs residential fringe).

Major regulatory impact; affects ramps, doors, bathrooms, and accessibility features.
Can significantly affect project costs (e.g., ramp design vs stairs).

Materials must be UL/ASTM/ANSI rated and tested by recognized labs.
Codes rely on third-party testing to ensure performance of electrical, structural, and building components.

Architect’s responsibility: design to conform with building codes and exceed minimum requirements where possible.
Contractor’s responsibility: build in accordance with the codes and the design intent, following notes and specifications.
Documentation can include notes that require conformance to codes even if not every dimension is explicit on the drawings.

Quiz focus: IBC 2012/2018 scope and administrative topics (permits, inspections, permits-related terms, certificate of occupancy).
Expect questions that require looking up code sections in the IBC (e.g., section numbers like 204 for a topic, 903.2 for sprinkler systems).
Extra credit (optional): locate five different code references in real-world settings, documenting the code number and a related detail (e.g., fire alarm, sprinkler, egress). Five distinct codes required for full credit.

AHJ = Authority Having Jurisdiction; primary enforcer on site.
IBC = International Building Code; baseline for building safety.
Occupancy classifications influence applicable code sections.
Fire rating reflects required safety margin for occupant evacuation.
ADA compliance is mandatory for accessibility; ramps and restrooms are common cost drivers.
Zoning governs form, use, parking, setbacks, and height; codes govern safety and structure.
Codes are updated slowly; major changes follow significant events and evolving safety data.

IBC 2012 - All test questions out of scope and the administrative part.

Extra credit: