|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 |
|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 F-1, M, S-1g
GROUP A, B, E, F-2, I, R, S-2g, Ub
|X < 5c||All||3||2||1|
|5 ≤ X < 10||IA |
|10 ≤ X < 30||IA, IB||2||1||1d|
|X ≥ 30||All||0||0||0|
Type IV construction (Heavy Timber, HT) is that type of construction in which the exterior walls are of noncombustible materials and the interior building elements are of solid or laminated wood without concealed spaces. The details of Type IV construction shall comply with the provisions of this section. Fire-retardant-treated wood framing complying with Section 2303.2 shall be permitted within exterior wall assemblies with a 2-hour rating or less. Minimum solid sawn nominal dimensions are required for structures built using Type IV construction (HT). For gluedlaminated members the equivalent net finished width and depths corresponding to the minimum nominal width and depths of solid sawn lumber are required as specified in Table 602.4.
WOOD MEMBER SIZE EQUIVALENCIES
|MINIMUM NOMINAL SOLID |
|MINIMUM GLUED-LAMINATED |
|Width, inch||Depth, inch||Width, inch||Depth, inch|
1. Fire-retardant-treated wood shall be permitted in:
2. Thermal and acoustical insulation, other than foam plastics, having a flame spread index of not more than 25.
1. 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.
3. Foam plastics in accordance with Chapter 26.
4. Roof coverings that have an A, B or C classification.
6. Millwork such as doors, door frames, window sashes and frames.
9. 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.
10. Finish flooring installed in accordance with Section 805.
11. 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.
14. Blocking such as for handrails, millwork, cabinets and window and door frames.
15. Light-transmitting plastics as permitted by Chapter 26.
16. Mastics and caulking materials applied to provide flexible seals between components of exterior wall construction.
18. Nailing or furring strips as permitted by Section 803.11.
21. 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.
22. Materials used to protect penetrations in fire-resistance-rated assemblies in accordance with Section 714.
24. Materials allowed in the concealed spaces of buildings of Types I and II construction in accordance with Section 718.5.
25. Materials exposed within plenums complying with Section 602of the Florida Buiding Code, Mechanical.