IFC Quality Control & Inspection 3 — Questions and Answers
Question 1: Under IBC special inspection requirements, how frequently must a periodic inspector visit an active firestop installation?
- Once at the very end of the project
- Often enough to observe a representative sample of each type of system being installed (Correct answer)
- Every calendar day without exception
- Only when the general contractor requests it
Correct answer: Often enough to observe a representative sample of each type of system being installed
Periodic special inspection requires the inspector to observe a representative sample of each system type to confirm compliance; the exact frequency is defined in the approved inspection program.
Question 2: Which condition would cause an inspector to reject a firestop sealant installation without requiring physical probing?
- The sealant color differs from adjacent surfaces
- Visible voids, cracks, or incomplete fill visible on the exposed face of the assembly (Correct answer)
- The product label is in a language other than English
- The installer used a caulking gun instead of bulk equipment
Correct answer: Visible voids, cracks, or incomplete fill visible on the exposed face of the assembly
Visible surface voids, cracks, or incomplete coverage are direct indicators of deficient installation that justify rejection on visual inspection alone.
Question 3: What is the purpose of a 'firestop program' as referenced in the IBC?
- To train all building occupants on emergency exits
- To establish a documented process for design, installation, inspection, and documentation of firestop systems (Correct answer)
- To market firestop products to contractors
- To schedule fire drills
Correct answer: To establish a documented process for design, installation, inspection, and documentation of firestop systems
A firestop program is a comprehensive, documented management system that covers the full lifecycle of firestop work — from design through final inspection and record-keeping.
Question 4: When a non-conforming firestop installation has been corrected, what is required before the inspector closes out the non-conformance?
- A verbal assurance from the installer
- Re-inspection of the corrected work with documentation confirming it now meets listed system requirements (Correct answer)
- Approval from the building owner only
- Submittal of a new shop drawing
Correct answer: Re-inspection of the corrected work with documentation confirming it now meets listed system requirements
Non-conformances are formally closed only after re-inspection confirms the corrected installation matches the listed system and the finding is documented as resolved.
Question 5: A firestop inspector discovers that a listed intumescent product was installed but has expired per its manufacturer-stated shelf life. What should the inspector do?
- Allow it since the product appears physically normal
- Reject the installation and require replacement with in-date material (Correct answer)
- Apply a topcoat sealant and approve
- Issue a conditional approval pending a fire test
Correct answer: Reject the installation and require replacement with in-date material
Expired firestop materials may not perform as tested; the listing is only valid for materials within their stated shelf life, and the installation must be rejected.
Question 6: Which entity is ultimately responsible for ensuring firestop special inspections are performed on a construction project?
- The firestop product manufacturer
- The owner or owner's authorized agent (Correct answer)
- The installing subcontractor
- The local fire marshal
Correct answer: The owner or owner's authorized agent
IBC Section 1705 places responsibility on the owner (or their authorized agent) to retain approved special inspection agencies and ensure inspections are conducted.
Question 7: What does 'L-rating' measure in a firestop assembly, and why is it relevant to QC inspection?
- The linear feet of sealant installed per hour
- Air leakage through the assembly at ambient and elevated temperatures (Correct answer)
- The load-bearing capacity of the penetration collar
- The luminance of the fire barrier under emergency lighting
Correct answer: Air leakage through the assembly at ambient and elevated temperatures
L-rating quantifies air leakage in cfm/ft²; inspectors must verify the correct L-rated system was used where code requires air barrier or smoke-leakage control.
IFC Quality Control & Inspection 3
Under IBC special inspection requirements, how frequently must a periodic inspector visit an active firestop installation?