|BUILDING ELEMENT||TYPE I||TYPE II||TYPE III||TYPE IV||TYPE V|
|Primary structural frameg (see Section 202)||3a||2a||1||0||1||0||HT||1||0|
|Nonbearing walls and partitions |
|See Table 602|
|Nonbearing walls and partitions |
|0||0||0||0||0||0||See Section 602.4.6||0||0|
|Floor construction and associated secondary members (see Section 202)||2||2||1||0||1||0||HT||1||0|
|Roof construction and associated secondary members (see Section 202)||11/2b||1b,c||1b,c||0c||1b,c||0||HT||1b,c||0|
|FIRE SEPARATION DISTANCE = |
|TYPE OF CONSTRUCTION||OCCUPANCY GROUP Hf||OCCUPANCY |
GROUP F-1, M, S-1g
GROUP A, B, E, F-2, I, R, S-2g, Ub
|5 ≤ X < 10||IA |
|10 ≤ X < 30||IA, IB |
|X ≥ 30||All||0||0||0|
|MINIMUM NOMINAL SOLID |
|MINIMUM GLUED-LAMINATED |
|Width, inch||Depth, inch||Width, inch||Depth, inch|
- Fire-retardant-treated wood shall be permitted in:
- Thermal and acoustical insulation, other than foam plastics, having a flame spread index of not more than 25.
- Insulation placed between two layers of noncombustible materials without an intervening airspace shall be allowed to have a flame spread index of not more than 100.
- Insulation installed between a finished floor and solid decking without intervening airspace shall be allowed to have a flame spread index of not more than 200.
- Foam plastics in accordance with Chapter 26.
- Roof coverings that have an A, B or C classification.
- Interior floor finish and floor covering materials installed in accordance with Section 804.
- Millwork such as doors, door frames, window sashes and frames.
- Interior wall and ceiling finishes installed in accordance with Sections 801 and 803.
- Trim installed in accordance with Section 806.
- Where not installed greater than 15 feet (4572 mm) above grade, show windows, nailing or furring strips and wooden bulkheads below show windows, including their frames, aprons and show cases.
- Finish flooring installed in accordance with Section 805.
- Partitions dividing portions of stores, offices or similar places occupied by one tenant only and that do not establish a corridor serving an occupant load of 30 or more shall be permitted to be constructed of fire-retardant-treated wood, 1-hour fire-resistance-rated construction or of wood panels or similar light construction up to 6 feet (1829 mm) in height.
- Stages and platforms constructed in accordance with Sections 410.3 and 410.4, respectively.
- Combustible exterior wall coverings, balconies and similar projections and bay or oriel windows in accordance with Chapter 14.
- Blocking such as for handrails, millwork, cabinets and window and door frames.
- Light-transmitting plastics as permitted by Chapter 26.
- Mastics and caulking materials applied to provide flexible seals between components of exterior wall construction.
- Exterior plastic veneer installed in accordance with Section 2605.2.
- Nailing or furring strips as permitted by Section 803.11.
- Heavy timber as permitted by Note c to Table 601 and Sections 602.4.7 and 1406.3.
- Aggregates, component materials and admixtures as permitted by Section 703.2.2.
- Sprayed fire-resistant materials and intumescent and mastic fire-resistant coatings, determined on the basis of fire-resistance tests in accordance with Section 703.2 and installed in accordance with Sections 1705.13 and 1705.14, respectively.
- Materials used to protect penetrations in fire-resistance-rated assemblies in accordance with Section 714.
- Materials used to protect joints in fire-resistance-rated assemblies in accordance with Section 715.
- Materials allowed in the concealed spaces of buildings of Types I and II construction in accordance with Section 718.5.
- Materials exposed within plenums complying with Section 602 of the International Mechanical Code.