Laserfiche WebLink
FIRE AND SMOKE PROTECTION FEATURES - <br /> SECTION 720 the flame spread and smoke-developed limits of Sections <br /> THERMAL-AND SOUND-INSULATING MATERIALS 720.2 and 720.3 when tested in accordance with CAN/ULC i J 720.1 General. Insulating materials, including facings such S102.2. <br /> as vapor retarders and vapor-permeable membranes, similar Exception: Cellulose loose-fill insulation shall not be <br /> coverings and all layers of single and multilayer reflective required to be tested in accordance with CAN/ULC <br /> foil insulations, shall comply with the requirements of this S102.2, provided such insulation complies with the <br /> section. Where a flame spread index or a smoke-developed requirements of Section 720.2 or 720.3, as applicable,and <br /> index is specified in this section, such index shall be deter- Section 720.6. <br /> mined in accordance with ASTM E 84 or UL 723.Any mate- <br /> rial that is subject to an increase in flame spread index or 720.5 Roof insulation. The use of combustible roof insula- <br /> smoke-developed index beyond the limits herein established tion not complying with Sections 720.2 and 720.3 shall be <br /> through the effects of age,moisture or other atmospheric con- pemutted in any type of construction provided it is covered <br /> ditions shall not be permitted. with approved roof coverings directly applied thereto. <br /> Exceptions: 720.6 Cellulose loose-fill insulation. Cellulose loose-fill <br /> insulation shall comply with CPSC 16 CFR Part 1209 and <br /> 1. Fiberboard insulation shall comply with Chapter 23. <br /> CPSC 16 CFR Part 1404. Each package of such insulating <br /> 2. Foam plastic insulation shall comply with Chapter material shall be clearly labeled in accordance with CPSC 16 <br /> 26. CFR Part 1209 and CPSC 16 CFR Part 1404. <br /> 3. Duct and pipe insulation and duct and pipe cover- 720.7 Insulation and covering on pipe and tubing. Insula- <br /> ings and linings in plenums shall comply with the tion and covering on pipe and tubing shall have a flame <br /> Mechanical Code. spread index of not more than 25 and a smoke-developed 1 <br /> 4. All layers of single and multilayer reflective plastic index of not more than 450. <br /> core insulation shall comply with Section 2613. Exception: Insulation and covering on pipe and tubing <br /> 720.2 Concealed installation. Insulating materials, where installed in plenums shall comply with the Mechanical <br /> concealed as installed in buildings of any type of construe- Code. <br /> lion,shall have a flame spread index of not more than 25 and <br /> a smoke-developed index of not more than 450. <br /> Exception: Cellulose loose-fill insulation that is not spray SECTION 721 <br /> applied, complying with the requirements of Section PRESCRIPTIVE FIRE RESISTANCE <br /> 720.6,shall only be required to meet the smoke-developed 721.1 General. The provisions of this section contain pre- <br /> index of not more than 450. scriptive details of fire-resistance-rated building elements, <br /> 720.2.1 Facings. Where such materials are installed in components or assemblies. The materials of construction <br /> be <br /> concealed spaces in buildings of Type ILL IV or V con- listed in Tables 721.1(1), 72 fire-resistance1.1(2), and 721.1(3) shall ed <br /> struction, the flame spread and smoke-developed limits- assumed to have the ratings prescribed <br /> [ions do not apply to facings, coverings, and layers of therein.Where materials that change the capacity for heat dis- <br /> reflective foil insulation that are installed behind and in sipation are incorporated into a fire-resistance-rated assem- <br /> substantial contact with the unexposed surface of the ceil- bly,fire test results or other substantiating data shall be made <br /> available to the building official to show that the required <br /> ing,wall or floor finish. fire-resistance-rating time period is not reduced. <br /> Exception: All layers of single and multilayer reflec- 721.1.1 Thickness of protective coverings.The thickness <br /> five plastic core insulation shall comply with Section of fire-resistant materials required for protection of stmc- <br /> 2613. tural members shall be not less than set forth in Table <br /> 720.3 Exposed installation. Insulating materials, where 721.1(1), except as modified in this section. The figures <br /> exposed as installed in buildings of any type of construction, shown shall be the net thickness of the protecting materials <br /> shall have a flame spread index of not more than 25 and a and shall not include any hollow space in back of the pro- <br /> smoke-developed index of not more than 450. tection. <br /> Exception: Cellulose loose-fill insulation that is not spray 721.1.2 Unit masonry protection.Where required, metal <br /> applied complying with the requirements of Section 720.6 ties shall be embedded in bed joints of unit masonry for <br /> shall only be required to meet the smoke-developed index protection of steel columns. Such ties shall be as set forth <br /> of not more than 450. in Table 721.1(1)or be equivalent thereto. <br /> 720.3.1 Attic floors. Exposed insulation materials 721.1.3 Reinforcement for cast-in-place concrete col- <br /> installed on attic floors shall have a critical radiant flux of umn protection. Cast-in-place concrete protection for <br /> not less than 0.12 watt per square centimeter when tested steel columns shall be reinforced at the edges of such <br /> in accordance with ASTM E 970. members with wire ties of not less than 0.18 inch(4.6 rum) ( j 720.4 Loose-fill insulation. Loose-fill insulation materials in diameter wound spirally around the columns on a pitch <br /> that cannot be mounted in the ASTM E 84 or UL 723 appara- of not more than 8 inches(203 mm)or by equivalent rein- <br /> tus without a screen or artificial supports shall comply with forcement. <br /> 154 2014 OREGON STRUCTURAL SPECIALTY CODE <br />