2
3
4
5
6
7 LONG TITLE
8 Committee Note:
9 The Business and Labor Interim Committee recommended this bill.
10 Legislative Vote: 12 voting for 0 voting against 8 absent
11 General Description:
12 This bill amends the State Construction and Fire Codes Act and enacts provisions
13 regarding the use of mass timber products.
14 Highlighted Provisions:
15 This bill:
16 ▸ amends the definition of the State Construction Code to include standards for the
17 use of mass timber products;
18 ▸ enacts building standards for the use of mass timber products for residential and
19 commercial building construction; and
20 ▸ makes technical and conforming changes.
21 Money Appropriated in this Bill:
22 None
23 Other Special Clauses:
24 None
25 Utah Code Sections Affected:
26 AMENDS:
27 15A-1-102, as enacted by Laws of Utah 2011, Chapter 14
28 15A-2-101, as enacted by Laws of Utah 2011, Chapter 14
29 15A-2-102, as last amended by Laws of Utah 2016, Chapter 249
30 ENACTS:
31 15A-2a-101, Utah Code Annotated 1953
32 15A-2a-102, Utah Code Annotated 1953
33 15A-2a-201, Utah Code Annotated 1953
34 15A-2a-202, Utah Code Annotated 1953
35 15A-2a-203, Utah Code Annotated 1953
36 15A-2a-204, Utah Code Annotated 1953
37 15A-2a-301, Utah Code Annotated 1953
38 15A-2a-302, Utah Code Annotated 1953
39 15A-2a-401, Utah Code Annotated 1953
40
41 Be it enacted by the Legislature of the state of Utah:
42 Section 1. Section 15A-1-102 is amended to read:
43 15A-1-102. Definitions.
44 As used in this title:
45 (1) "Board" means the Utah Fire Prevention Board created in Section 53-7-203.
46 (2) "Division" means the Division of Occupational and Professional Licensing created
47 in Section 58-1-103, except as provided in:
48 (a) Part 4, State Fire Code Administration Act; and
49 (b) Chapter 5, State Fire Code Act.
50 (3) "State Construction Code" means the State Construction Code adopted by:
51 (a) Chapter 2, Adoption of State Construction Code;
52 (b) Chapter 2a, Tall Wood Buildings of Mass Timber Construction Incorporated as
53 Part of State Construction Code;
54 [
55 Code; [
56 [
57 Code[
58 (e) Chapter 6, Additional Construction Requirements.
59 (4) "State Fire Code" means the State Fire Code adopted by Chapter 5, State Fire Code
60 Act.
61 (5) "Utah Code" means the Utah Code Annotated (1953), as amended.
62 Section 2. Section 15A-2-101 is amended to read:
63 15A-2-101. Title -- Adoption of code.
64 (1) This chapter is known as the "Adoption of State Construction Code."
65 (2) In accordance with Chapter 1, Part 2, State Construction Code Administration Act,
66 the Legislature repeals the State Construction Code in effect on July 1, 2010, and adopts the
67 following as the State Construction Code:
68 (a) this chapter;
69 (b) Chapter 2a, Tall Wood Buildings of Mass Timber Construction Incorporated as
70 Part of State Construction Code;
71 [
72 Code; [
73 [
74 Code[
75 (e) Chapter 6, Additional Construction Requirements.
76 Section 3. Section 15A-2-102 is amended to read:
77 15A-2-102. Definitions.
78 As used in this chapter [
79 Construction Incorporated as Part of State Construction Code, Chapter 3, Statewide
80 Amendments Incorporated as Part of State Construction Code, and Chapter 4, Local
81 Amendments Incorporated as Part of State Construction Code:
82 (1) "HUD Code" means the Federal Manufactured Housing Construction and Safety
83 Standards Act, as issued by the Department of Housing and Urban Development and published
84 in 24 C.F.R. Parts 3280 and 3282 (as revised April 1, 1990).
85 (2) "IBC" means the edition of the International Building Code adopted under Section
86 15A-2-103.
87 (3) "IEBC" means the edition of the International Existing Building Code adopted
88 under Section 15A-2-103.
89 (4) "IECC" means the edition of the International Energy Conservation Code adopted
90 under Section 15A-2-103.
91 (5) "IFGC" means the edition of the International Fuel Gas Code adopted under
92 Section 15A-2-103.
93 (6) "IMC" means the edition of the International Mechanical Code adopted under
94 Section 15A-2-103.
95 (7) "IPC" means the edition of the International Plumbing Code adopted under Section
96 15A-2-103.
97 (8) "IRC" means the edition of the International Residential Code adopted under
98 Section 15A-2-103.
99 (9) "NEC" means the edition of the National Electrical Code adopted under Section
100 15A-2-103.
101 (10) "UWUI" means the edition of the Utah Wildland Urban Interface Code adopted
102 under Section 15A-2-103.
103 Section 4. Section 15A-2a-101 is enacted to read:
104
105
106
107 15A-2a-101. Title.
108 (1) This chapter is known as "Tall Wood Buildings of Mass Timber Construction
109 Incorporated as Part of State Construction Code."
110 (2) This chapter establishes building standards for the use of mass timber products in
111 residential and commercial building construction and is applicable statewide.
112 (3) Where this chapter replaces a section of the IBC that Chapter 3, Statewide
113 Amendments Incorporated as Part of State Construction Code, or Chapter 4, Local
114 Amendments Incorporated as Part of State Construction Code, amends, the amendment in
115 Chapter 3 or 4 shall apply to the IBC replacement in this chapter.
116 Section 5. Section 15A-2a-102 is enacted to read:
117 15A-2a-102. Definitions.
118 As used in this chapter:
119 (1) "Mass timber" means a structural element of Type IV construction primarily of
120 solid, built-up, panelized or engineered wood products that meet minimum cross section
121 dimensions of Type IV construction.
122 (2) "Non-combustible protection" (for mass timber) means non-combustible material in
123 accordance with IBC Section 703.5, designed to increase the fire-resistance rating and delay the
124 combustion of mass timber.
125 (3) "Wall, load-bearing" means any wall meeting either of the following classifications:
126 (a) any metal or wood stud wall that supports more than 100 pounds per linear foot
127 (1459 N/m) of vertical load in addition to its own weight; or
128 (b) any masonry or concrete, or mass timber wall that supports more than 200 pounds
129 per linear foot (2919 N/m) of vertical load in addition to its own weight.
130 Section 6. Section 15A-2a-201 is enacted to read:
131
132 15A-2a-201. Amendments to Chapter 4 of IBC.
133 In IBC, Section 403.3.2, is deleted and replaced with the following: "403.3.3 Water
134 supply to required fire pumps. In all buildings that are more than 420 feet (128m) in building
135 height, and buildings of Type IV-A and IV-B construction that are more than 120 feet in
136 building height, required fire pumps shall be supplied by connections to not fewer than two
137 water mains located in different streets. Separate supply piping shall be provided between each
138 connection to the water main and the pumps. Each connection and the supply piping between
139 the connection and the pumps shall be sized to supply the flow and pressure required for the
140 pumps to operate.
141 Exception: Two connections to the same main shall be permitted provided that the main
142 is valved such that an interruption can be isolated so that the water supply will continue
143 without interruption through not fewer than one of the connections."
144 Section 7. Section 15A-2a-202 is enacted to read:
145 15A-2a-202. Amendments to Chapter 5 of IBC.
146 (1) In IBC, Table 504.3, is deleted and replaced with the following: "Table 504.3
147 ALLOWABLE BUILDING HEIGHT IN FEET ABOVE GRADE PLANE
| 148 | OCCUPANCY CLASSIFICATION | TYPE OF CONSTRUCTION | ||||||||||||
| SEE FOOTNOTES | TYPE I | TYPE II | TYPE III | TYPE IV | TYPE V | |||||||||
| A | B | A | B | A | B | A | B | C | HT | A | B | |||
| 149 | A, B, E, F, M, S, U | NSb | UL | 160 | 65 | 55 | 65 | 55 | 65 | 65 | 65 | 65 | 50 | 40 |
| S | UL | 180 | 85 | 75 | 85 | 75 | 180 | 120 | 85 | 85 | 70 | 60 | ||
| 150 | H-1, H-2, H-3, H-5 | NSc, d | UL | 160 | 65 | 55 | 65 | 55 | 120 | 90 | 65 | 65 | 50 | 40 |
| S | ||||||||||||||
| 151 | H-4 | NSc, d | UL | 160 | 65 | 55 | 65 | 55 | 65 | 65 | 65 | 65 | 50 | 40 |
| S | UL | 180 | 85 | 75 | 85 | 75 | 140 | 100 | 85 | 85 | 70 | 60 | ||
| 152 | I-1 Condition 1, I-3 | NSd, e | UL | 160 | 65 | 55 | 65 | 55 | 65 | 65 | 65 | 65 | 50 | 40 |
| S | UL | 180 | 85 | 75 | 85 | 75 | 180 | 120 | 85 | 85 | 70 | 60 | ||
| 153 | I-1 Condition 2, I-2 | NSd, e, f | UL | 160 | 65 | 55 | 65 | 55 | 65 | 65 | 65 | 65 | 50 | 40 |
| S | UL | 180 | 85 | |||||||||||
| 154 | I-4 | NSd, g | UL | 160 | 65 | 55 | 65 | 55 | 65 | 65 | 65 | 65 | 50 | 40 |
| S | UL | 180 | 85 | 75 | 85 | 75 | 180 | 120 | 85 | 85 | 70 | 60 | ||
| 155 | Rh | NSd | UL | 160 | 65 | 55 | 65 | 55 | 65 | 65 | 65 | 65 | 50 | 40 |
| S13D | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 50 | 40 | ||
| S13R | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | ||
| S | UL | 180 | 85 | 75 | 85 | 75 | 180 | 120 | 85 | 85 | 70 | 60 | ||
157 UL = Unlimited; NS = Buildings not equipped throughout with an automatic sprinkler
158 system; S = Buildings equipped throughout with an automatic sprinkler system installed in
159 accordance with Section 903.3.1.1; S13R = Buildings equipped throughout with an automatic
160 sprinkler system installed in accordance with Section 903.3.1.2; S13D = Buildings equipped
161 throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.3.
162 a. See Chapters 4 and 5 for specific exceptions to the allowable height in this chapter.
163 b. See Section 903.2 for the minimum thresholds for protection by an automatic
164 sprinkler system for specific occupancies.
165 c. New Group H occupancies are required to be protected by an automatic sprinkler
166 system in accordance with Section 903.2.5.
167 d. The NS value is only for use in evaluation of existing building area in accordance
168 with the IEBC.
169 e. New Group I-1 and I-3 occupancies are required to be protected by an automatic
170 sprinkler system in accordance with Section 903.2.6. For new Group I-1 occupancies,
171 Condition 1, see Exception 1 of Section 903.2.6.
172 f. New and existing Group I-2 occupancies are required to be protected by an automatic
173 sprinkler system in accordance with Section 903.2.6 and Section 1103.5 of the International Fire 174 Code.
175 g. New Group I-4 occupancies see Exceptions 2 and 3 of Section 903.2.6.
176 h. New Group R occupancies are required to be protected by an automatic sprinkler
177 system in accordance with Section 903.2.8."
178 (2) In IBC, Table 504.4, "Allowable Number of Stories Above Grade Planea, b" delete
179 Type IV and replace it with the following, in relation to the occupancy classification and
180 footnotes as indicated:
| 181 | OCCUPANCY CLASSIFICATION | TYPE OF CONSTRUCTION | ||||
| SEE FOOTNOTES | TYPE IV | |||||
| A | B | C | HT | |||
| 182 | A-1 | NS | 3 | 3 | 3 | 3 |
| S | 9 | 6 | 4 | 4 | ||
| 183 | A-2 | NS | 3 | 3 | 3 | 3 |
| S | 18 | 12 | 6 | 4 | ||
| 184 | A-3 | NS | 3 | 3 | 3 | 3 |
| S | 18 | 12 | 6 | 4 | ||
| 185 | A-4 | NS | 3 | 3 | 3 | 3 |
| S | 18 | 12 | 6 | 4 | ||
| 186 | A-5 | NS | 1 | 1 | 1 | UL |
| S | UL | UL | UL | UL | ||
| 187 | B | NS | 5 | 5 | 5 | 5 |
| S | 18 | 12 | 9 | 6 | ||
| 188 | E | NS | 3 | 3 | 3 | 3 |
| S | 9 | 6 | 4 | 4 | ||
| 189 | F-1 | NS | 3 | 3 | 3 | 4 |
| S | 10 | 7 | 5 | 5 | ||
| 190 | F-2 | NS | 5 | 5 | 5 | 5 |
| S | 12 | 8 | 6 | 6 | ||
| 191 | H-1 | NSc, d | NP | NP | NP | 1 |
| S | 1 | 1 | 1 | |||
| 192 | H-2 | NSc, d | 1 | 1 | 1 | 2 |
| S | 2 | 2 | 2 | |||
| 193 | H-3 | NSc, d | 3 | 3 | 3 | 4 |
| S | 4 | 4 | 4 | |||
| 194 | H-4 | NSc, d | 5 | 5 | 5 | 5 |
| S | 8 | 7 | 6 | 6 | ||
| 195 | H-5 | NSc, d | 2 | 2 | 2 | 3 |
| S | 3 | 3 | 3 | |||
| 196 | I-1 Condition 1 | NSd, e | 4 | 4 | 4 | 4 |
| S | 10 | 7 | 5 | 5 | ||
| 197 | I-1 Condition 2 | NSd, e | 3 | 3 | 3 | 4 |
| S | 10 | 6 | 4 | |||
| 198 | I-2 | NSd, f | NP | NP | NP | 1 |
| S | 7 | 5 | 1 | |||
| 199 | I-3 | NSd, e | 2 | 2 | 2 | 2 |
| S | 7 | 5 | 3 | 3 | ||
| 200 | I-4 | NSd, g | 3 | 3 | 3 | 3 |
| S | 9 | 6 | 4 | 4 | ||
| 201 | M | NS | 4 | 4 | 4 | 4 |
| S | 12 | 8 | 6 | 5 | ||
| 202 | R-1h | NSd | 4 | 4 | 4 | 4 |
| S13R | ||||||
| S | 18 | 12 | 8 | 5 | ||
| 203 | R-2h | NSd | 4 | 4 | 4 | 4 |
| S13R | ||||||
| S | 18 | 12 | 8 | 5 | ||
| 204 | R-3h | NSd | 4 | 4 | 4 | 4 |
| S13D | ||||||
| S13R | ||||||
| S | 18 | 12 | 5 | 5 | ||
| 205 | R-4h | NSd | 4 | 4 | 4 | 4 |
| S13D | ||||||
| S13R | ||||||
| S | 18 | 12 | 5 | 5 | ||
| 206 | S-1 | NS | 4 | 4 | 4 | 4 |
| 207 | S | 10 | 7 | 5 | 5 | |
| 208 | S-2 | NS | 4 | 4 | 4 | 4 |
| 209 | S | 12 | 8 | 5 | 5 | |
| 210 | U | NS | 4 | 4 | 4 | 4 |
| 211 | S | 9 | 6 | 5 | 5 | |
213 automatic sprinkler system; S = Buildings equipped throughout with an automatic sprinkler
214 system installed in accordance with Section 903.3.1.1; S13R = Buildings equipped throughout
215 with an automatic sprinkler system installed in accordance with Section 903.3.1.2; S13D =
216 Buildings equipped throughout with an automatic sprinkler system installed in accordance with
217 Section 903.3.1.3.
218 a. See Chapters 4 and 5 for specific exceptions to the allowable height in this chapter.
219 b. See Section 903.2 for the minimum thresholds for protection by an automatic
220 sprinkler system for specific occupancies.
221 c. New Group H occupancies are required to be protected by an automatic sprinkler
222 system in accordance with Section 903.2.5.
223 d. The NS value is only for use in evaluation of existing building height in accordance
224 with the IEBC.
225 e. New Group I-1 and I-3 occupancies are required to be protected by an automatic
226 sprinkler system in accordance with Section 903.2.6. For new Group I-1 occupancies,
227 Condition 1, see Exception 1 of Section 903.2.6.
228 f. New and existing Group I-2 occupancies are required to be protected by an automatic
229 sprinkler system in accordance with Sections 903.2.6 and 1103.5 of the International Fire
230 Code.
231 g. For new Group I-4 occupancies, see Exceptions 2 and 3 of Section 903.2.6.
232 h. New Group R occupancies are required to be protected by an automatic sprinkler
233 system in accordance with Section 903.2.8."
234 (3) In IBC, Table 506.2, "Allowable Area Factor (At = NS, S1, S13R, S13D or SM, as
235 applicable) in Square Feeta, b" delete Type IV and replace it with the following, in relation to the
236 occupancy classification and footnotes as indicated:
| 237 | "OCCUPANCY CLASSIFICATION | SEE FOOTNOTES | ||||
| B | C | HT | ||||
| 238 | A-1 | NS | 30,000 | 18,750 | 15,000 | |
| S1 | 120,000 | 75,000 | 60,000 | |||
| SM | 90,000 | 56,250 | 45,000 | |||
| 239 | A-2 | NS | 30,000 | 18,750 | 15,000 | |
| S1 | 120,000 | 75,000 | 60,000 | |||
| SM | 90,000 | 56,250 | 45,000 | |||
| 240 | A-3 | NS | 30,000 | 18,750 | 15,000 | |
| S1 | 120,000 | 75,000 | 60,000 | |||
| SM | 90,000 | 56,250 | 45,000 | |||
| 241 | A-4 | NS | 30,000 | 18,750 | 15,000 | |
| S1 | 120,000 | 75,000 | 60,000 | |||
| SM | 90,000 | 56,250 | 45,000 | |||
| 242 | A-5 | NS | UL | UL | UL | |
| S1 | ||||||
| SM | ||||||
| 243 | B | NS | 72,000 | 45,000 | 36,000 | |
| S1 | 288,000 | 180,000 | 144,000 | |||
| SM | 216,000 | 135,000 | 108,000 | |||
| 244 | E | NS | 51,000 | 31,875 | 25,500 | |
| S1 | 204,000 | 127,500 | 102,000 | |||
| SM | 153,000 | 95,625 | 76,500 | |||
| 245 | F-1 | NS | 67,000 | 41,875 | 33,500 | |
| S1 | 268,000 | 167,500 | 134,000 | |||
| SM | 201,000 | 125,625 | 100,500 | |||
| 246 | F-2 | NS | 101,000 | 63,125 | 50,500 | |
| S1 | 404,000 | 252,500 | 202,000 | |||
| SM | 303,000 | 189,375 | 151,500 | |||
| 247 | H-1 | NSc | 10,500 | 10,500 | 10,500 | |
| S1 | ||||||
| 248 | H-2 | NSc | 10,500 | 10,500 | 10,500 | |
| S1 | ||||||
| SM | ||||||
| 249 | H-3 | NSc | 25,500 | 25,500 | 25,500 | |
| S1 | ||||||
| SM | ||||||
| 250 | H-4 | NSc, d | 54,000 | 40,500 | 36,000 | |
| S1 | 216,000 | 162,000 | 144,000 | |||
| SM | 162,000 | 121,500 | 108,000 | |||
| 251 | H-5 | NSc, d | 54,000 | 40,500 | 36,000 | |
| S1 | 216,000 | 162,000 | 144,000 | |||
| SM | 162,000 | 121,500 | 108,000 | |||
| 252 | I-1 | NSd, e | 36,000 | 18,000 | 18,000 | |
| S1 | 144,000 | 72,000 | 72,000 | |||
| SM | 108,000 | 54,000 | 54,000 | |||
| 253 | I-2 | NSd, f | 24,000 | 12,000 | 12,000 | |
| S1 | 96,000 | 48,000 | 48,000 | |||
| SM | 72,000 | 36,000 | 36,000 | |||
| 254 | I-3 | NSd, e | 24,000 | 12,000 | 12,000 | |
| S1 | 96,000 | 48,000 | 48,000 | |||
| SM | 72,000 | 36,000 | 36,000 | |||
| 255 | I-4 | NSd, g | 51,000 | 25,500 | 25,500 | |
| S1 | 204,000 | 102,000 | 102,000 | |||
| SM | 153,000 | 76,500 | 76,500 | |||
| 256 | M | NS | 41,000 | 25,625 | 20,500 | |
| S1 | 164,000 | 102,500 | 82,000 | |||
| SM | 123,000 | 76,875 | 61,500 | |||
| 257 | R-1h | NSd | 41,000 | 25,625 | 20,500 | |
| S13R | ||||||
| S1 | 164,000 | 102,500 | 82,000 | |||
| SM | 123,000 | 76,875 | 61,500 | |||
| 258 | R-2h | NSd | 41,000 | 25,625 | 20,500 | |
| S13R | ||||||
| S1 | 164,000 | 102,500 | 82,000 | |||
| SM | 123,000 | 76,875 | 61,500 | |||
| 259 | R-3h | NSd | UL | UL | UL | |
| S13D | ||||||
| S13R | ||||||
| S1 | ||||||
| SM | ||||||
| 260 | R-4h | NSd | 41,000 | 25,625 | 20,500 | |
| S13D | ||||||
| S13R | ||||||
| S1 | 164,000 | 102,500 | 82,000 | |||
| SM | 123,000 | 76,875 | 61,500 | |||
| 261 | S-1 | NS | 51,000 | 31,875 | 25,500 | |
| S1 | 204,000 | 127,500 | 102,000 | |||
| SM | 153,000 | 95,625 | 76,500 | |||
| 262 | S-2 | NS | 77,000 | 48,125 | 38,500 | |
| S1 | 308,000 | 192,500 | 154,000 | |||
| SM | 308,000 | 144,375 | 115,500 | |||
| 263 | U | NSi | 36,000 | 22,500 | 18,000 | |
| S1 | 144,000 | 90,000 | 72,000 | |||
| SM | 108,000 | 67,500 | 54,000" | |||
265 UL = Unlimited; NP = Not Permitted; NS = Buildings not equipped throughout with an
266 automatic sprinkler system; S1 = Buildings a maximum of one story above grade plane
267 equipped throughout with an automatic sprinkler system installed in accordance with Section
268 903.3.1.1; SM = Buildings two or more stories above grade plane equipped throughout with an
269 automatic sprinkler system installed in accordance with Section 903.3.1.1; S13R = Buildings
270 equipped throughout with an automatic sprinkler system installed in accordance with Section
271 903.3.1.2; S13D = Buildings equipped throughout with an automatic sprinkler system installed
272 in accordance with Section 903.3.1.3.
273 a. See Chapters 4 and 5 for specific exceptions to the allowable height in this chapter.
274 b. See Section 903.2 for the minimum thresholds for protection by an automatic
275 sprinkler system for specific occupancies.
276 c. New Group H occupancies are required to be protected by an automatic sprinkler
277 system in accordance with Section 903.2.5.
278 d. The NS value is only for use in evaluation of existing building area in accordance
279 with the IEBC.
280 e. New Group I-1 and I-3 occupancies are required to be protected by an automatic sprinkler 281 system in accordance with Section 903.2.6. For new Group I-1 occupancies,
282 Condition 1, see Exception 1 of Section 903.2.6.
283 f. New and existing Group I-2 occupancies are required to be protected by an automatic
284 sprinkler system in accordance with Section 903.2.6 and Section 1103.5 of the International
285 Fire Code.
286 g. For New Group I-4 occupancies see Exceptions 2 and 3 of Section 903.2.6.
287 h. New Group R occupancies are required to be protected by an automatic sprinkler
288 system in accordance with Section 903.2.8.
289 i. The maximum allowable area for a single-story nonsprinklered Group U greenhouse
290 is permitted to be 9,000 square feet, or the allowable area shall be permitted to comply with
291 Table C102.1 of Appendix C."
292 (4) In IBC, Section 508.4.4 is deleted and replaced with the following: "508.4.4
293 Separation. Individual occupancies shall be separated from adjacent occupancies in accordance
294 with Table 508.4."
295 (5) In IBC, Section 508.4.4.1 is deleted and replaced with the following: "508.4.4.1
296 Construction. Required separations shall be fire barriers constructed in accordance with Section
297 707 or horizontal assemblies constructed in accordance with Section 711, or both, so as to
298 completely separate adjacent occupancies. Mass timber elements serving as fire barriers or
299 horizontal assemblies to separate occupancies in Type IV-B or IV-C construction shall be
300 separated from the interior of the building with an approved thermal barrier consisting of a
301 minimum of 1/2 inch (12.7 mm) gypsum board or a material that is tested in accordance with
302 and meets the acceptance criteria of both the Temperature Transmission Fire Test and the
303 Integrity Fire Test of NFPA 275."
304 (6) In IBC, Section 509, a new section is added as follows: "509.4.1.1 Type IV-B and
305 IV-C construction. Where Table 509 specifies a fire-resistance-rated separation, mass timber
306 elements serving as fire barriers or a horizontal assembly in Type IV-B or IV-C construction
307 shall be separated from the interior of the incidental use with an approved thermal barrier
308 consisting of a minimum of 1/2 inch (12.7 mm) gypsum board or a material that is tested in
309 accordance with and meets the acceptance criteria of both the Temperature Transmission Fire
310 Test and the Integrity Fire Test of NFPA 275."
311 Section 8. Section 15A-2a-203 is enacted to read:
312 15A-2a-203. Amendments to Chapter 6 of IBC.
313 (1) In IBC, Table 601 is deleted and replaced with the following:
314 "TABLE 601 FIRE-RESISTANCE RATING REQUIREMENTS FOR BUILDING
315 ELEMENTS (HOURS)
| 316 | BUILDING ELEMENT | TYPE I | TYPE II | TYPE III | TYPE IV | TYPE V | |||||||
| A | B | A | B | A | B | A | B | C | HT | A | B | ||
| 317 | Primary structural framef (see Section 202) | 3a, b | 2a, b | 1b | 0 | 1b | 0 | 3a | 2a | 2a | HT | 1b | 0 |
| 318 | Bearing walls Exteriore, f Interior | 3 3a | 2 2a | 1 1 | 0 0 | 2 1 | 2 0 | 3 3 | 2 2 | 2 2 | 2 1/HT | 1 1 | 0 0 |
| 319 | Nonbearing walls and partitions Exterior | See Table 602 0 | |||||||||||
| 320 | Nonbearing walls and partitions Interiord | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | See Section 2304.1 1.2 | 0 | 0 |
| 321 | Floor construction and associated secondary members (see Section 202) | 2 | 2 | 1 | 0 | 1 | 0 | 2 | 2 | 2 | HT | 1 | 0 |
| 322 | Roof construction and associated secondary members (see Section 202) | 2 | 1b, c | 1b, c | 0 c | 1b, c | 0 | 11/ | 1 | 1 | HT | 1b, c | 0 |
324 a. Roof supports: Fire-resistance ratings of primary structural frame and bearing walls
325 are permitted to be reduced by 1 hour where supporting a roof only.
326 b. Except in Group F-1, H, M and S-1 occupancies, fire protection of structural
327 members in roof construction shall not be required, including protection of primary structural
328 frame members, roof framing and decking where every part of the roof construction is 20 feet
329 or more above any floor immediately below. Fire-retardant-treated wood members shall be
330 allowed to be used for such unprotected members.
331 c. In all occupancies, heavy timber complying with Section 2304.11 shall be allowed
332 where a 1-hour or less fire-resistance rating is required.
333 d. Not less than the fire-resistance rating required by other sections of this code.
334 e. Not less than the fire-resistance rating based on fire separation distance (see Table
335 602).
336 f. Not less than the fire-resistance rating as referenced in Section 704.10."
337 (2) In IBC, Table 602 is deleted and replaced with the following:
338 "TABLE 602 FIRE-RESISTANCE RATING REQUIREMENTS FOR EXTERIOR WALLS
339 BASED ON FIRE SEPARATION DISTANCE a, d, g
| 340 | Fire Separation Distance = X (feet) | TYPE OF CONSTRUCTI ON | OCCUPANC Y GROUP He | OCCUPANCY GROUP F-1, M, S-1f | OCCUPANCY GROUP A, B, F-2, I, Ri, S-2, Uh |
| 341 | < 5b | All | 3 | 2 | 1 |
| 342 | 5 ≤ X < 10 | IA, IVA Others | 3 2 | 2 1 | 11 |
| 343 | 10 ≤ X < 30 | IA, IB, IVA, IVB IIB, VB Others | 2 1 1 | 1 0 1 | 1c 0 1c |
| 344 | X ≥ 30 | All | 0 | 0 | 0 |
346 a. Load-bearing exterior walls shall also comply with the fire-resistance rating
347 requirements of Table 601.
348 b. See Section 706.1.1 for party walls.
349 c. Open parking garages complying with Section 406 shall not be required to have a
350 fire-resistance rating.
351 d. The fire-resistance rating of an exterior wall is determined based upon the fire
352 separation distance of the exterior wall and the story in which the wall is located.
353 e. For special requirements for Group H occupancies, see Section 415.6.
354 f. For special requirements for Group S aircraft hangars, see Section 412.3.1.
355 g. Where Table 705.8 permits nonbearing exterior walls with unlimited area of
356 unprotected openings, the required fire-resistance rating for the exterior walls is 0 hours.
357 h. For a building containing only a Group U occupancy private garage or carport, the
358 exterior wall shall not be required to have a fire-resistance rating where the fire separation
359 distance is 5 feet (1523 mm) or greater.
360 i. For a Group R-3 building of Type II-B or Type V-B construction, the exterior wall
361 shall not be required to have a fire-resistance rating where the fire separation distance is 5 feet
362 (1523 mm) or greater."
363 (3) In IBC, Section 602.4 is deleted and replaced with the following: "602.4 Type IV.
364 Type IV construction is that type of construction in which the building elements are mass
365 timber or non-combustible materials and have fire-resistance ratings in accordance with Table
366 601. Mass timber elements shall meet the fire-resistance rating requirements of this section
367 based on either the fire-resistance rating of the non-combustible protection, the mass timber, or
368 a combination of both and shall be determined in accordance with Section 703.2 or 703.3. The
369 minimum dimensions and permitted materials for building elements shall comply with the
370 provisions of this section and Section 2304.11. Mass timber elements of Types IV-A, IV-B and
371 IV-C construction shall be protected with non-combustible protection applied directly to the
372 mass timber in accordance with Sections 602.4.1 through 602.4.3. The time assigned to the
373 non-combustible protection shall be determined in accordance with Section 703.8 and comply
374 with Section 722.7.
375 Cross-laminated timber shall be labeled as conforming to PRG 320-18 as referenced in
376 Section 2303.1.4.
377 Exterior load-bearing walls and nonload-bearing walls shall be mass timber
378 construction, or shall be of non-combustible construction.
379 Exception: Exterior load-bearing walls and nonload-bearing walls of Type IV-HT
380 Construction in accordance with Section 602.4.4.
381 The interior building elements, including nonload-bearing walls and partitions, shall be
382 of mass timber construction or of non-combustible construction.
383 Exception: Interior building elements and nonload-bearing walls and partitions of Type
384 IV-HT Construction in accordance with Section 602.4.4.
385 Combustible concealed spaces are not permitted except as otherwise indicated in
386 Sections 602.4.1 through 602.4.4. Combustible stud spaces within light frame walls of Type
387 IV-HT construction shall not be considered concealed spaces, but shall comply with Section
388 718.
389 In buildings of Type IV-A, B, and C, construction with an occupied floor located more
390 than 75 feet above the lowest level of fire department access, up to and including 12 stories or
391 180 feet above grade plane, mass timber interior exit and elevator hoistway enclosures shall be
392 protected in accordance with Section 602.4.1.2. In buildings greater than 12 stories or 180 feet
393 above grade plane, interior exit and elevator hoistway enclosures shall be constructed of
394 non-combustible materials."
395 (4) In IBC, Section 602.4.1 is deleted and replaced with the following: "602.4.1 Type
396 IV-A. Building elements in Type IV-A construction shall be protected in accordance with
397 Sections 602.4.1.1 through 602.4.1.6. The required fire-resistance rating of non-combustible
398 elements and protected mass timber elements shall be determined in accordance with Section
399 703.2 or Section 703.3."
400 (5) In IBC, Section 602, a new section is added as follows: "602.4.1.1 Exterior
401 Protection. The outside face of exterior walls of mass timber construction shall be protected
402 with non-combustible protection with a minimum assigned time of 40 minutes as determined
403 in Section 722.7.1. All components of the exterior wall covering shall be on non-combustible
404 material except water resistive barriers having a peak heat release rate of less than 150 kW/m2,
405 a total heat release of less than 20 MJ/m2 and an effective heat of combustion of less than 18
406 MJ/kg as determined in accordance with ASTM E1354 and having a flame spread index of 25
407 or less and a smoke-developed index of 450 or less as determined in accordance with ASTM
408 E84 or UL723. The ASTM E1354 test shall be conducted on specimens at the thickness
409 intended for use, in the horizontal orientation and at an incident radiant heat flux of 50
410 kW/m2."
411 (6) In IBC, Section 602, a new section is added as follows: "602.4.1.2 Interior
412 Protection. Interior faces of all mass timber elements, including the inside faces of exterior
413 mass timber walls and mass timber roofs, shall be protected with materials complying with
414 Section 703.5."
415 (7) In IBC, Section 602, a new section is added as follows: "602.4.1.2.1 Protection
416 Time. Non-combustible protection shall contribute a time equal to or greater than times
417 assigned in Table 722.7.1(1), but not less than 80 minutes. The use of materials and their
418 respective protection contributions listed in Table 722.7.1(2) shall be permitted to be used for
419 compliance with Section 722.7.1."
420 (8) In IBC, Section 602, a new section is added as follows: "602.4.1.3 Floors. The floor
421 assembly shall contain a non-combustible material not less than one inch in thickness above the
422 mass timber. Floor finishes in accordance with Section 804 shall be permitted on top of the
423 non-combustible material. The underside of floor assemblies shall be protected in accordance
424 with Section 602.4.1.2."
425 (9) In IBC, Section 602, a new section is added as follows: "602.4.1.4 Roofs. The
426 interior surfaces of roof assemblies shall be protected in accordance with Section 602.4.1.2.
427 Roof coverings in accordance with Chapter 15 shall be permitted on the outside surface of the
428 roof assembly."
429 (10) In IBC, Section 602, a new section is added as follows: "602.4.1.5 Concealed
430 spaces. Concealed spaces shall not contain combustibles other than electrical, mechanical, fire
431 protection, or plumbing materials and equipment permitted in plenums in accordance with
432 Section 602 of the IMC, and shall comply with all applicable provisions of Section 718.
433 Combustible construction forming concealed spaces shall be protected in accordance with
434 Section 602.4.1.2."
435 (11) In IBC, Section 602, a new section is added as follows: "602.4.1.6 Shafts. Shafts
436 shall be permitted in accordance with Sections 713 and 718. Both the shaft side and room side
437 of mass timber elements shall be protected in accordance with Section 602.4.1.2."
438 (12) In IBC, Section 602.4.2 is deleted and replaced with the following: "602.4.2 Type
439 IV-B. Building elements in Type IV-B construction shall be protected in accordance with
440 Sections 602.4.2.1 through 602.4.2.6. The required fire resistance rating of non-combustible
441 elements or mass timber elements shall be determined in accordance with Section 703.2 or
442 Section 703.3."
443 (13) In IBC, Section 602, a new section is added as follows: "602.4.2.1 Exterior
444 protection. The outside face of exterior walls of mass timber construction shall be protected
445 with non-combustible protection with a minimum assigned time of 40 minutes as determined
446 in Section 722.7.1. All components of the exterior wall covering shall be of non-combustible
447 material except water resistive barriers having a peak heat release rate of less than 150 kW/m2,
448 a total heat release of less than 20 MJ/m2 and an effective heat of combustion of less than
449 18MJ/kg as determined in accordance with ASTM E1354, and having a flame spread index of
450 25 or less and a smoke-developed index of 450 or less as determined in accordance with
451 ASTM E84 or UL 723. The ASTM E1354 test shall be conducted on specimens at the
452 thickness intended for use, in the horizontal orientation and at an incident radiant heat flux of
453 50 kW/m2."
454 (14) In IBC, Section 602, a new section is added as follows: "602.4.2.2 Interior
455 protection. Interior faces of all mass timber elements, including the inside face of exterior mass
456 timber walls and mass timber roofs, shall be protected, as required by this section, with
457 materials complying with Section 703.5."
458 (15) In IBC, Section 602, a new section is added as follows: "602.4.2.2.1 Protection
459 time. Non-combustible protection shall contribute a time equal to or greater than times
460 assigned in Table 722.7.1(1), but not less than 80 minutes. The use of materials and their
461 respective protection contributions listed in Table 722.7.1(2) shall be permitted to be used for
462 compliance with Section 722.7.1."
463 (16) In IBC, Section 602, a new section is added as follows: "602.4.2.2.2 Protected
464 area. All interior faces of all mass timber elements shall be protected in accordance with
465 Section 602.4.2.2.1, including the inside face of exterior mass timber walls and mass timber
466 roofs.
467 Exceptions: Unprotected portions of mass timber ceilings and walls complying with
468 Section 602.4.2.2.4 and the following:
469 1. Unprotected portions of mass timber:
470 (a) ceilings, including attached beams, shall be permitted and shall be limited to an
471 area equal to 20% of the floor area in any dwelling unit or fire area;
472 (b) walls, including attached columns, shall be permitted and shall be limited to an area
473 equal to 40% of the floor area in any dwelling unit or fire area; or
474 (c) walls and ceilings, including attached columns and beams, in any dwelling unit or
475 fire area shall be permitted in accordance with Section 602.4.2.2.3.
476 2. Mass timber columns and beams which are not an integral portion of walls or
477 ceilings, respectively, shall be permitted to be unprotected without restriction of either
478 aggregate area or separation from one another."
479 (17) In IBC, Section 602, a new section is added as follows: "602.4.2.2.3 Mixed
480 unprotected areas. In each dwelling unit or fire area, where both portions of ceilings and
481 portions of walls are unprotected, the total allowable unprotected area shall be determined in
482 accordance with Equation 6-1.
483 (Utc/Ua c) + (Utw/Ua w) 1 (Equation 6-1) where:
484 Utc = Total unprotected mass timber ceiling areas
485 Ua c = Allowable unprotected mass timber ceiling area conforming to Section
486 602.4.2.2.2, Exception 1
487 Utw = Total unprotected mass timber wall areas
488 Ua w = Allowable unprotected mass timber wall area conforming to Section
489 602.4.2.2.2, Exception 2."
490 (18) In IBC, Section 602, a new section is added as follows: "602.4.2.2.4 Separation
491 distance between unprotected mass timber elements. In each dwelling unit or fire area,
492 unprotected portions of mass timber walls and ceilings shall be not less than 15 feet from
493 unprotected portions of other walls and ceilings, measured horizontally along the ceiling and
494 from other unprotected portions of walls measured horizontally along the floor."
495 (19) In IBC, Section 602, a new section is added as follows: "602.4.2.3 Floors. The
496 floor assembly shall contain a non-combustible material not less than one inch in thickness
497 above the mass timber. Floor finishes in accordance with Section 804 shall be permitted on top
498 of the non-combustible material. The underside of floor assemblies shall be protected in
499 accordance with Section 602.4.1.2."
500 (20) In IBC, Section 602, a new section is added as follows: "602.4.2.4 Roofs. The
501 interior surfaces of roof assemblies shall be protected in accordance with Section 602.4.2.2
502 except, in non-occupiable spaces, they shall be treated as a concealed space with no portion left
503 unprotected. Roof coverings in accordance with Chapter 15 shall be permitted on the outside
504 surface of the roof assembly."
505 (21) In IBC, Section 602, a new section is added as follows: "602.4.2.5 Concealed
506 spaces. Concealed spaces shall not contain combustibles other than electrical, mechanical, fire
507 protection, or plumbing materials and equipment permitted in plenums in accordance with
508 Section 602 of the IMC, and shall comply with all applicable provisions of Section 718.
509 Combustible construction forming concealed spaces shall be protected in accordance with
510 Section 602.4.1.2."
511 (22) In IBC, Section 602, a new section is added as follows: "602.4.2.6 Shafts. Shafts
512 shall be permitted in accordance with Section 713 and Section 718. Both the shaft side and
513 room side of mass timber elements shall be protected in accordance with Section 602.4.1.2."
514 (23) In IBC, Section 602.4.3 is deleted and replaced with the following: "602.4.3 Type
515 IV-C. Building elements in Type IV-C construction shall be protected in accordance with
516 Sections 602.4.3.1 through 602.4.3.6. The required fire-resistance rating of building elements
517 shall be determined in accordance with Section 703.2 or Section 703.3."
518 (24) In IBC, Section 602, a new section is added as follows: "602.4.3.1 Exterior
519 Protection. The exterior side of walls of combustible construction shall be protected with
520 non-combustible protection with a minimum assigned time of 40 minutes as determined in
521 Section 722.7.1. All components of the exterior wall covering shall be of non-combustible
522 material except water resistive barriers having a peak heat release rate of less than 150 kW/m2,
523 a total heat release of less than 20 MJ/m2 and an effective heat of combustion of less than
524 18MJ/kg as determined in accordance with ASTM E1354 and having a flame spread index of
525 25 or less and a smoke-developed index of 450 or less as determined in accordance with
526 ASTM E84 or UL723. The ASTM E1354 test shall be conducted on specimens at the thickness
527 intended for use, in the horizontal orientation and at an incident radiant heat flux of 50
528 kW/m2."
529 (25) In IBC, Section 602, a new section is added as follows: "602.4.3.2 Interior
530 protection. Mass timber elements are permitted to be unprotected."
531 (26) In IBC, Section 602, a new section is added as follows: "602.4.3.3 Floors. Floor
532 finishes in accordance with Section 804 shall be permitted on top of the floor construction."
533 (27) In IBC, Section 602, a new section is added as follows: "602.4.3.4 Roofs. Roof
534 coverings in accordance with Chapter 15 shall be permitted on the outside surface of the roof
535 assembly."
536 (28) In IBC, Section 602, a new section is added as follows: "602.4.3.5 Concealed
537 spaces. Concealed spaces shall not contain combustibles other than electrical, mechanical, fire
538 protection, or plumbing materials and equipment permitted in plenums in accordance with
539 Section 602 of the IMC, and shall comply with all applicable provisions of Section 718.
540 Combustible construction forming concealed spaces shall be protected with non-combustible
541 protection with a minimum assigned time of 40 minutes as determined in Section 722.7.1."
542 (29) In IBC, Section 602, a new section is added as follows: "602.4.3.6 Shafts. Shafts
543 shall be permitted in accordance with Section 713 and Section 718. Shafts and elevator
544 hoistway and interior exit stairway enclosures shall be protected with non-combustible
545 protection with a minimum assigned time of 40 minutes as determined in Section 722.7.1, on
546 both the inside of the shaft and the outside of the shaft."
547 (30) In IBC, Section 602, a new section is added as follows: "602.4.4 Type IV-HT.
548 Type IV construction (Heavy Timber, HT) is that type of construction in which the exterior
549 walls are of non-combustible materials and the interior building elements are of solid wood,
550 laminated heavy timber or structural composite lumber (SCL), without concealed spaces. The
551 minimum dimensions for permitted materials including solid timber, glued-laminated timber,
552 structural composite lumber (SCL) and cross laminated timber (CLT) and details of Type IV
553 construction shall comply with the provisions of this section and Section 2304.11. Exterior
554 walls complying with Section 602.4.4.1 or 602.4.4.2 shall be permitted. Interior walls and
555 partitions not less than one-hour fire-resistance rating or heavy timber conforming with Section
556 2304.11.2.2 shall be permitted."
557 (31) In IBC, Section 602, a new section is added as follows: "602.4.4.1
558 Fire-retardant-treated wood in exterior walls. Fire-retardant-treated wood framing and
559 sheathing complying with Section 2303.2 shall be permitted within exterior wall assemblies
560 not less than 6 inches (152 mm) in thickness with a two-hour rating or less."
561 (32) In IBC, Section 602, a new section is added as follows: "602.4.4.2
562 Cross-laminated timber in exterior walls. Cross-laminated timber complying with Section
563 2303.1.4 shall be permitted within exterior wall assemblies not less than 6 inches (152 mm) in
564 thickness with a two-hour rating or less, provided the exterior surface of the cross-laminated
565 timber is protected by one the following:
566 1. fire-retardant-treated wood sheathing complying with Section 2303.2 and not less
567 than 15/32 inch (12 mm) thick;
568 2. gypsum board not less than 1/2 inch (12.7 mm) thick; or
569 3. a non-combustible material."
570 (33) In IBC, Section 602, a new section is added as follows: "602.4.4.3 Exterior
571 structural members. Where a horizontal separation of 20 feet (6096 mm) or more is provided,
572 wood columns and arches conforming to heavy timber sizes complying with Section 2304.11
573 shall be permitted to be used externally."
574 Section 9. Section 15A-2a-204 is enacted to read:
575 15A-2a-204. Amendments to Chapter 7 of IBC.
576 (1) In IBC, Section 703, a new section is added as follows: "703.8 Determination of
577 non-combustible protection time contribution. The time, in minutes, contributed to the
578 fire-resistance rating by the non-combustible protection of mass timber building elements,
579 components, or assemblies, shall be established through a comparison of assemblies tested
580 using procedures set forth in ASTM E119 or UL263. The test assemblies shall be identical in
581 construction, loading, and materials, other than the non-combustible protection. The two test
582 assemblies shall be tested to the same criteria of structural failure.
583 (a) Test Assembly 1 shall be without protection.
584 (b) Test Assembly 2 shall include the representative non-combustible protection. The
585 protection shall be fully defined in terms of configuration details, attachment details, joint
586 sealing details, accessories and all other relevant details.
587 The non-combustible protection time contribution shall be determined by subtracting
588 the fire-resistance time, in minutes, of Test Assembly 1 from the fire-resistance time, in
589 minutes, of Test Assembly 2."
590 (2) In IBC, Section 703, a new section is added as follows: "703.9 Sealing of adjacent
591 mass timber elements. In buildings of Type IV-A, IV-B, and IV-C construction, sealant or
592 adhesive shall be provided to resist the passage of air in the following locations:
593 1. At abutting edges and intersections of mass timber building elements required to be
594 fire-resistance-rated.
595 2. At abutting intersections of mass timber building elements and building elements of
596 other materials where both are required to be fire-resistance-rated.
597 Sealants shall meet the requirements of ASTM C920. Adhesives shall meet the
598 requirements of ASTM D3498.
599 Exception: Sealants or adhesives need not be provided where they are not a required
600 component of a tested fire-resistance-rated assembly."
601 (3) In IBC, Section 718.2.1 is deleted and replaced with the following: "718.2.1
602 Fireblocking materials. Fireblocking shall consist of the following materials:
603 1. Two-inch (51 mm) nominal lumber.
604 2. Two thicknesses of 1-inch (25 mm) nominal lumber with broken lap joints.
605 3. One thickness of 0.719-inch (18.3 mm) wood structural panels with joints backed by
606 0.719-inch (18.3 mm) wood structural panels.
607 4. One thickness of 0.75-inch (19.1 mm) particleboard with joints backed by 0.75-inch
608 (19 mm) particleboard.
609 5. 1/2 inch (12.7 mm) gypsum board.
610 6. 1/4 inch (6.4 mm) cement-based millboard.
611 7. Batts or blankets of mineral wool, mineral fiber or other approved materials installed
612 in such a manner as to be securely retained in place.
613 8. Cellulose insulation installed as tested for the specific application.
614 9. Mass timber complying with Section 2304.11."
615 (4) In IBC, Section 722, a new section is added as follows: "722.7 Fire-Resistance
616 rating of mass timber. The required fire resistance of mass timber elements in Section 602.4
617 shall be determined in accordance with Section 703.2 or Section 703.3. The fire-resistance
618 rating of building elements shall be as required in Tables 601 and 602 and as specified
619 elsewhere in this code. The fire-resistance rating of the mass timber elements shall consist of
620 the fire-resistance of the unprotected element added to the protection time of the
621 non-combustible protection."
622 (5) In IBC, Section 722, a new section is added as follows: "722.7.1 Minimum required
623 protection. Where required by Sections 602.4.1 through 602.4.3, non-combustible protection
624 shall be provided for mass timber building elements in accordance with Table 722.7.1(1). The
625 rating, in minutes, contributed by the non-combustible protection of mass timber building
626 elements, components, or assemblies, shall be established in accordance with Section 703.8.
627 The protection contributions indicated in Table 722.7.1(2) and Section 722.7.2 shall be deemed
628 to comply with this requirement when installed and fastened in accordance with Section
629 722.7.2."
630 (6) In IBC, Section 722, a new table is added as follows: "TABLE 722.7.1(1)
631 PROTECTION REQUIRED FROM NON-COMBUSTIBLE COVERING MATERIAL
| 632 | Required Fire Resistance Rating of Building Element per Tables 601 and 602 (hours) | Minimum Protection Required from Non-combustible |
| 633 | 1 | 40 |
| 634 | 2 | 80 |
| 635 | 3 or more | 120" |
637 PROTECTION PROVIDED BY NON-COMBUSTIBLE COVERING MATERIAL
| 638 | Non-combustible Protection | Protection | |
| (minutes) | |||
| 639 | 1/2 inch Type X Gypsum | ||
| 640 | 25 | ||
| 641 | 5 /8 inch Type X Gypsum | ||
| 642 | Board | 40" | |
644 gypsum board non-combustible protection. Gypsum board complying with Table 722.7.1(2)
645 shall be installed in accordance with this section."
646 (9) In IBC, Section 722, a new section is added as follows: "722.7.2.1 Interior surfaces.
647 Layers of Type X gypsum board serving as non-combustible protection for interior surfaces of
648 wall and ceiling assemblies determined in accordance with Table 722.7.1(1) shall be installed
649 in accordance with the following:
650 1. Each layer shall be attached with Type S drywall screws of sufficient length to
651 penetrate the mass timber at least 1 inch when driven flush with the paper surface of the
652 gypsum board.
653 Exception: The third layer, where determined necessary by Section 722.7, shall be
654 permitted to be attached with 1 inch #6 Type S drywall screws to furring channels in
655 accordance with ASTM C645.
656 2. Screws for attaching the base layer shall be 12 inches on center in both directions.
657 3. Screws for each layer after the base layer shall be 12 inches on center in both
658 directions and offset from the screws of the previous layers by 4 inches in both directions.
659 4. All panel edges of any layer shall be offset 18 inches from those of the previous
660 layer.
661 5. All panel edges shall be attached with screws sized and offset as in items 1 through
662 4 above and placed at least 1 inch but not more than 2 inches from the panel edge.
663 6. All panels installed at wall-to-ceiling intersections shall be installed such that ceiling
664 panels are installed first and the wall panels are installed after the ceiling panel has been
665 installed and is fitted tight to the ceiling panel. Where multiple layers are required, each layer
666 shall repeat this process.
667 7. All panels installed at a wall-to-wall intersection shall be installed such that the
668 panels covering an exterior wall or a wall with a greater fire resistance rating shall be installed
669 first and the panels covering the other wall shall be fitted tight to the panel covering the first
670 wall. Where multiple layers are required, each layer shall repeat this process.
671 8. Panel edges of the face layer shall be taped and finished with joint compound.
672 Fastener heads shall be covered with joint compound.
673 9. Panel edges protecting mass timber elements adjacent to unprotected mass timber
674 elements in accordance with Section 602.4.2.2 shall be covered with 1-1/4 inch metal corner
675 bead and finished with joint compound."
676 (10) In IBC, Section 722, a new section is added as follows: "722.7.2.2 Exterior
677 surfaces. Layers of Type X gypsum board serving as non-combustible protection for the outside
678 of the exterior heavy timber walls determined in accordance with Table 722.7.1(1) shall be
679 fastened 12 inches on center each way and 6 inches on center at all joints or ends. All panel
680 edges shall be attached with fasteners located at least 1 inch but not more than 2 inches from
681 the panel edge. Fasteners shall comply with one of the following:
682 1. Galvanized nails of minimum 12 guage with a 7/16 inch head of sufficient length to
683 penetrate the mass timber a minimum of 1 inch.
684 2. Screws which comply with ASTM C1002 (Type S, Type W, or Type G) of sufficient
685 length to penetrate the mass timber a minimum of 1 inch."
686 (11) In IBC, Section 1705, a new section is added as follows: "1705.19 Sealing of mass
687 timber. Periodic special inspections of sealants or adhesives shall be conducted where sealant
688 or adhesive required by Section 703.9 is applied to mass timber building elements as
689 designated in the approved construction documents."
690 (12) In IBC, Section 3102.3 is deleted and replaced with the following: "3102.3 Type
691 of construction. Non-combustible membrane structures shall be classified as Type IIB
692 construction. Non-combustible frame or cable-supported structures covered by an approved
693 membrane in accordance with Section 3102.3.1 shall be classified as Type IIB construction.
694 Heavy timber frame-supported structures covered by an approved membrane in accordance
695 with Section 3102.3.1 shall be classified as Type IV-HT construction. Other membrane
696 structures shall be classified as Type V construction.
697 Exception: Plastic less than 30 feet (9144 mm) above any floor used in greenhouses,
698 where occupancy by the general public is not authorized, and for aquaculture pond covers is
699 not required to meet the fire propagation performance criteria of Test Method 1 or Test Method
700 2, as appropriate, of NFPA 701."
701 (13) In IBC, Section 3102.6.1.1 is deleted and replaced with the following: "3102.6.1.1
702 Membrane. A membrane meeting the fire propagation performance criteria of Test Method 1 or
703 Test Method 2, as appropriate, of NFPA 701 shall be permitted to be used as the roof or as a
704 skylight on buildings of Type IIB, III, IV-HT and V construction, provided that the membrane
705 is not less than 20 feet (6096 mm) above any floor, balcony or gallery."
706 Section 10. Section 15A-2a-301 is enacted to read:
707
708 15A-2a-301. Amendments to Chapter 7 of IFC.
709 In IFC, Section 701.6 is deleted and replaced with the following: "701.6 Owner's
710 responsibility. The owner shall maintain an inventory of all required fire-resistance-rated
711 construction, construction installed to resist the passage of smoke and the construction included
712 in Sections 703 through 707 and Sections 602.4.1 and 602.4.2 of the International Building
713 Code. Such construction shall be visually inspected by the owner annually and properly
714 repaired, restored or replaced where damaged, altered, breached or penetrated. Records of
715 inspections and repairs shall be maintained. Where concealed, such elements shall not be
716 required to be visually inspected by the owner unless the concealed space is accessible by the
717 removal or movement of a panel, access door, ceiling tile or similar movable entry to the
718 space."
719 Section 11. Section 15A-2a-302 is enacted to read:
720 15A-2a-302. Amendments to Chapters 9 and 33 of IFC.
721 (1) In IFC, Section 914.3.1.2 is deleted and replaced with the following: "914.3.1.2
722 Water supply to required fire pumps. In all buildings that are more than 420 feet (128m) in
723 building height, and buildings of Type IV-A and IV-B construction that are more than 120 feet
724 in building height, required fire pumps shall be supplied by connections to not fewer than two
725 water mains located in different streets. Separate supply piping shall be provided between the
726 connection and the pumps shall be sized to supply the flow and pressure required for the pumps
727 to operate.
728 Exception: Two connections to the same main shall be permitted provided that the main
729 is valved such that an interruption can be isolated so that the water supply will continue
730 without interruption through not fewer than one of the connections."
731 (2) In IFC, Section 3308, a new section is added as follows: "3308.9 Fire safety
732 requirements for buildings of Types IV-A, IV-B, and IV-C construction. Buildings of Types
733 IV-A, IV-B, and IV-C construction designed to be greater than six stories above grade plane
734 shall comply with the following requirements during construction unless otherwise approved
735 by the fire code official:
736 1. Standpipes shall be provided in accordance with Section 3313.
737 2. A water supply for fire department operations, as approved by the fire code official
738 and the fire chief.
739 3. Where building construction exceeds six stories above grade plane, at least one layer
740 of non-combustible protection where required by Section 602.4 of the International Building
741 Code shall be installed on all building elements more than 4 floor levels, including mezzanines,
742 below active mass timber construction before erecting additional floor levels.
743 Exception: Shafts and vertical exit enclosures shall not be considered a part of the
744 active mass timber construction.
745 4. Where building construction exceeds six stories above grade plane required exterior
746 wall coverings shall be installed on all floor levels more than 4 floor levels, including
747 mezzanines, below active mass timber construction before erecting additional floor level.
748 Exception: Shafts and vertical exit enclosures shall not be considered a part of the
749 active mass timber construction."
750 Section 12. Section 15A-2a-401 is enacted to read:
751
752 15A-2a-401. Reference Standards.
753 ASTM
754 D3498-03(2011): Standard Specification for Adhesives for Field-Gluing Plywood to
755 Lumber Framing for Floor Systems
756 ASTM International
757 100 Barr Harbor Drive,
758 P.O. Box C700
759 West Conshohocken, PA 19428-2959