This standard covers methods for testing the fire-resistive properties of masonry units and of composite assemblies of building members. OSHA references NFPA 251 in 1926.152 on flammable and combustible liquids by requiring that inside storage rooms be constructed to meet the required fire-resistive rating for their use.
The following editions have been incorporated by reference (IBR) into the Code of Federal Regulations (CFR):
| IBR approved for | Overview of requirements | IBR approved edition |
|---|---|---|
| 1NFPA 251 was withdrawn in 2010. Material found in ASTM E119 and UL 263. | ||
| 29 CFR 1910.106(d)(3)(ii) | Employers must ensure storage cabinets are designed and constructed to limit the internal temperature to not more than 325°F. when subjected to a 10-minute fire test using the standard time-temperature curve as set forth in Standard Methods of Fire Tests of Building Construction and Materials, NFPA 251--1969. | NFPA 251-1969 Standard Methods of Fire Tests of Building Construction and Materials.1 |
| 29 CFR 1910.106(d)(4)(i) | Employers must ensure construction of inside storage rooms complies with the test specifications set forth in Standard Methods of Fire Tests of Building Construction and Materials, NFPA 251--1969. Employers must ensure windows are protected as set forth in the Standard for Fire Doors and Windows, NFPA No. 80--1968, for Class E or F openings. | NFPA 251-1969 Standard Methods of Fire Tests of Building Construction and Materials.1 |
| 29 CFR 1926.152(b)(4)(i) | Employers must ensure inside storage rooms for flammable and combustible liquids are constructed to comply with the test specifications set forth in Standard Methods of Fire Test of Building Construction and Material, NFPA 251-1969. | NFPA 251-1969 Standard Methods of Fire Tests of Building Construction and Materials.1 |
| 29 CFR 1926.155(f) | Employers must determine fire resistance by the Standard Methods of Fire Tests of Building Construction and Materials, NFPA 251-1969. | NFPA 251-1969 Standard Methods of Fire Tests of Building Construction and Materials. |
Standards are available for purchase from the American National Standards Institute (ANSI), see webstore.ansi.org, and from the National Fire Protection Association (NFPA), see catalog.nfpa.org.