A warehouse reroofing project is being checked under 2021 IBC 1505.1. Which statement correctly describes the roof fire-classification requirement?
- AEvery warehouse roof requires a two-hour structural fire-resistance rating solely because it is a warehouse.
- The minimum roof-covering classification is selected from Table 1505.1 based on construction type; listed Class A, B and C assemblies or coverings are tested to ASTM E108 or UL 790.
- CA weather-resistance warranty establishes the roof fire classification.
- DAll roofing materials must individually be noncombustible regardless of the approved assembly.
Where to look it up
https://core-docs.s3.amazonaws.com/documents/asset/uploaded_file/3836/Lennox/3042180/2021_International_Building_Code.pdf
Why B is correct
Section 1505.1 addresses roof fire classifications and selects minimum coverings by construction type. These classifications are distinct from hourly fire-resistance ratings of structural assemblies; a generic claim that every material must be fire-resistant does not establish compliance. Source: 2021 IBC 1505.1; https://core-docs.s3.amazonaws.com/documents/asset/uploaded_file/3836/Lennox/3042180/2021_International_Building_Code.pdf