The provisions of Section 803 of IBC are adopted by reference with the following modifications:
1. Revise Section 803.3 to read:
"803.3 Heavy timber exemption.
In buildings protected throughout by an automatic sprinkler system in accordance with Section 903.3.1.1 or 903.3.1.2, exposed portions of structural elements complying with the requirements for heavy timber construction in Section 602.4 or Section 2304.11 shall not be subject to interior finish requirements except in interior exit stairways, interior exit ramps, and exit passageways."
2. Replace Table 803.13 as shown:
TABLE 803.13
INTERIOR WALL AND CEILING FINISH REQUIREMENTS BY OCCUPANCY k
INTERIOR WALL AND CEILING FINISH REQUIREMENTS BY OCCUPANCY k
GROUP
| SPRINKLERED l |
NONSPRINKLERED
| ||||
Interior exit stairways and ramps, exit passageways and interior portions of the exit discharge a |
Corridors and enclosure for exit access stairways and ramps
| Rooms and enclosed spaces c | Interior exit stairways and ramps, exit passageways and interior portions of the exit discharge a |
Corridors and enclosure for exit access stairways and ramps
| Rooms and enclosed spaces c | |
GROUP
| SPRINKLERED l |
NONSPRINKLERED
| ||||
Interior exit stairways and ramps, exit passageways and interior portions of the exit discharge a |
Corridors and enclosure for exit access stairways and ramps
| Rooms and enclosed spaces c | Interior exit stairways and ramps, exit passageways and interior portions of the exit discharge a |
Corridors and enclosure for exit access stairways and ramps
| Rooms and enclosed spaces c | |
A-1, A-2 | A | B | C | A | A | B e |
A-3, A-4, A-5 | A | B | C | A | A | C |
B, E, M, R-1 | A | C m |
C | A | B | C |
R-4 | B | C | C | A | B | B |
F | A | C | C | A | C | C |
H | A | B | C g |
A | A | B |
I-1 | A | C | C | A | B | B |
I-2 | A | B | B h, i |
A | A | A |
I-3 | A | A j |
C | A | A | B |
I-4 | A | B | B h, i |
A | A | B |
R-2 | A | C | C | A | B | C |
R-3, R-5 | C | C | C | C | C | C |
S | A | C | C | A | B | C |
U | No restrictions | No restrictions | ||||
For SI: 1 inch = 25.4 mm, 1 square foot = 0.0929 m
2.
a. Class C interior finish materials shall be permitted for wainscotting or paneling of not more than 1,000 square feet of applied surface area in the grade-level lobby where applied directly to a noncombustible base or over furring strips applied to a noncombustible base and fireblocked as required by Section 803.15.1.
b. [Reserved.]
c. Requirements for rooms and enclosed spaces shall be based on spaces enclosed by partitions. Where a fire-resistance rating is required for structural elements, the enclosing partitions shall extend from the floor to the ceiling. Partitions that do not comply with this shall be considered to be enclosing spaces and the rooms or spaces on both sides shall be considered to be one room or space. In determining the applicable requirements for rooms and enclosed spaces, the specific occupancy thereof shall be the governing factor regardless of the group classification of the building or structure.
d. [Reserved.]
e. Class C interior finish materials shall be permitted in places of assembly with an occupant load of 300 persons or less.
f. [Reserved.]
g. Class B material is required where the building exceeds two stories above grade plane.
h. Class C interior finish materials shall be permitted in administrative spaces.
i. Class C interior finish materials shall be permitted in rooms with a capacity of four persons or less.
j. Class B materials shall be permitted as wainscotting extending not more than 48 inches above the finished floor in corridors, exit access stairways and exit access ramps.
k. Finish materials as provided for in other sections of this code.
l. Applies when protected by an automatic sprinkler system installed in accordance with Section 903.3.1.1 or 903.3.1.2.
m. Corridors in ambulatory care facilities shall be provided with Class A or B materials.
3. Revise Section 803.15.1 by replacing "1 3/4 inches (44 mm)" with "1 3/4 inches (44 mm) in depth."
4. Revise Section 803.15.1.1 by deleting "inorganic or."
(Amend Coun. J. 2-19-20, p. 14473, Art. II, § 26)