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Building Codes and Regulations Flashcards

7 cards from real CBP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Building Codes and Regulations flashcards as text

  1. Under the IRC, what is the maximum riser height permitted for a residential stairway?

    Answer: 7-3/4 inches

    IRC R311.7.5.1 limits stair risers to a maximum of 7-3/4 inches.

  2. Which handrail height range does the IRC require, measured vertically from the sloped plane of the tread nosings?

    Answer: 34 to 38 inches

    IRC R311.7.8.1 requires handrails between 34 and 38 inches above the tread nosings.

  3. An IRC guard is required on an open-sided deck when the walking surface is more than how high above the floor or grade below?

    Answer: 30 inches

    IRC R312.1.1 requires guards where the walking surface is more than 30 inches above grade within 36 inches horizontally.

  4. Required guards must have openings that do not allow passage of a sphere of what diameter?

    Answer: 4 inches

    IRC R312.1.3 limits guard openings to less than a 4-inch sphere, with exceptions at stair triangles and on the sides of stairs.

  5. What is the maximum sill height for an emergency escape and rescue opening above the finished floor?

    Answer: 44 inches

    IRC R310.2.2 sets a maximum sill height of 44 inches above the floor.

  6. What minimum net clear opening does the IRC require for an emergency escape opening located on a grade-level floor?

    Answer: 5.0 sq ft

    Grade-floor or below-grade openings may be 5.0 sq ft, while other openings require 5.7 sq ft.

  7. Which project is generally exempt from a building permit under IRC R105.2?

    Answer: A one-story detached tool shed of 180 sq ft

    One-story detached accessory structures not exceeding 200 sq ft are exempt from permits under the IRC.

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Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. portal.ct.gov — Eligibility · verified Oct 2026
  2. phta.org — Score validity, test delivery, exam dates, registration deadline, score release, test dates, fees, exam format, passing score, time limit · verified Oct 2026
Building Codes and Regulations Flashcards — CBP Study Cards with Answers