Building Codes & Regulations Flashcards

Which IRC chapter primarily governs the energy efficiency requirements for new residential construction?

Answer: Chapter 11 – Energy Efficiency

Chapter 11 of the IRC, often cross-referenced with the IECC, establishes energy efficiency requirements for residential buildings.

A homeowner wants to convert a garage into a bedroom. Which code concern is MOST critical?

Answer: Egress window requirement

Bedrooms must have at least one egress window meeting minimum opening size, sill height, and net clear opening dimensions under the IRC.

Under IRC Section R302, what is the minimum fire-resistance rating required for the wall separating an attached garage from a dwelling?

Answer: ½-inch gypsum board on the garage side

IRC R302.6 requires the wall between an attached garage and the dwelling to be protected with not less than ½-inch gypsum board on the garage side.

What does the acronym 'AHJ' stand for in the context of building codes?

Answer: Authority Having Jurisdiction

AHJ stands for Authority Having Jurisdiction, the entity responsible for enforcing code requirements in a given area.

The IRC requires smoke alarms to be installed in which of the following locations?

Answer: In each bedroom, outside each sleeping area, and on each story

IRC R314 requires smoke alarms inside each bedroom, outside each separate sleeping area, and on every story including the basement.

When a local code conflicts with a state-adopted model code, which typically takes precedence?

Answer: The local code, if it is more restrictive

Local amendments may be more restrictive than the adopted model code, and where adopted, the more restrictive local provision generally governs.

Under the IRC, what is the minimum net clear opening area required for an egress window in a sleeping room?

Answer: 5.7 square feet

IRC R310 requires egress windows in sleeping rooms to have a minimum net clear opening area of 5.7 square feet (5.0 sq ft for grade-floor openings).