Amendments to Chapter 5 of IBC.

  1. Law
  2. Utah Code
  3. State Construction and Fire Codes Act
  4. Tall Wood Buildings of Mass Timber Construction Incorporated as Part of State Construction Code
  5. Statewide Amendments to International Building Code
  6. Amendments to Chapter 5 of IBC.

Checkout our iOS App for a better way to browser and research.



  • (1) In IBC, Table 504.3, is deleted and replaced with the following: "Table 504.3 ALLOWABLE BUILDING HEIGHT IN FEET ABOVE GRADE PLANE
    • OCCUPANCY CLASSIFICATIONTYPE OF CONSTRUCTION
    • SEE FOOTNOTESTYPE ITYPE IITYPE IIITYPE IVTYPE V
    • ABABABABCHTAB
    • A, B, E, F, M, S, UNSbUL16065556555656565655040
    • SUL1808575857518012085857060
    • H-1, H-2, H-3, H-5NSc, dUL160655565551209065655040
    • S
    • H-4NSc, dUL16065556555656565655040
    • SUL1808575857514010085857060
    • I-1 Condition 1, I-3NSd, eUL16065556555656565655040
    • SUL1808575857518012085857060
    • I-1 Condition 2, I-2NSd, e, fUL16065556555656565655040
    • SUL18085
    • I-4NSd, gUL16065556555656565655040
    • SUL1808575857518012085857060
    • RhNSdUL16065556555656565655040
    • S13D606060606060606060605040
    • S13R606060606060606060606060
    • SUL1808575857518012085857060
    For SI: 1 foot = 304.8 mm
    UL = Unlimited; NS = Buildings not equipped throughout with an automatic sprinkler system; S = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1; S13R = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.2; S13D = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.3.
    a. See Chapters 4 and 5 for specific exceptions to the allowable height in this chapter.
    b. See Section 903.2 for the minimum thresholds for protection by an automatic sprinkler system for specific occupancies.
    c. New Group H occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.5.
    d. The NS value is only for use in evaluation of existing building area in accordance with the IEBC.
    e. New Group I-1 and I-3 occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.6. For new Group I-1 occupancies, Condition 1, see Exception 1 of Section 903.2.6.
    f. New and existing Group I-2 occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.6 and Section 1103.5 of the International Fire Code.
    g. New Group I-4 occupancies see Exceptions 2 and 3 of Section 903.2.6.
    h. New Group R occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.8."
  • (2) In IBC, Table 504.4, "Allowable Number of Stories Above Grade Planea, b" delete Type IV and replace it with the following, in relation to the occupancy classification and footnotes as indicated:
    • OCCUPANCY CLASSIFICATIONTYPE OF CONSTRUCTION
    • SEE FOOTNOTESTYPE IV
    • ABCHT
    • A-1NS3333
    • S9644
    • A-2NS3333
    • S181264
    • A-3NS3333
    • S181264
    • A-4NS3333
    • S181264
    • A-5NS111UL
    • SULULULUL
    • BNS5555
    • S181296
    • ENS3333
    • S9644
    • F-1NS3334
    • S10755
    • F-2NS5555
    • S12866
    • H-1NSc, dNPNPNP1
    • S111
    • H-2NSc, d1112
    • S222
    • H-3NSc, d3334
    • S444
    • H-4NSc, d5555
    • S8766
    • H-5NSc, d2223
    • S333
    • I-1 Condition 1NSd, e4444
    • S10755
    • I-1 Condition 2NSd, e3334
    • S1064
    • I-2NSd, fNPNPNP1
    • S751
    • I-3NSd, e2222
    • S7533
    • I-4NSd, g3333
    • S9644
    • MNS4444
    • S12865


    • R-1h
      NSd4444
    • S13R
    • S181285
    • R-2hNSd4444
    • S13R
    • S181285
    • R-3hNSd4444
    • S13D
    • S13R
    • S181255
    • R-4hNSd4444
    • S13D
    • S13R
    • S181255
    • S-1NS4444
    • S10755
    • S-2NS4444
    • S12855
    • UNS4444
    • S9655
    UL = Unlimited; NP = Not Permitted; NS = Buildings not equipped throughout with an automatic sprinkler system; S = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1; S13R = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.2; S13D = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.3.
    a. See Chapters 4 and 5 for specific exceptions to the allowable height in this chapter.
    b. See Section 903.2 for the minimum thresholds for protection by an automatic sprinkler system for specific occupancies.
    c. New Group H occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.5.
    d. The NS value is only for use in evaluation of existing building height in accordance with the IEBC.
    e. New Group I-1 and I-3 occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.6. For new Group I-1 occupancies, Condition 1, see Exception 1 of Section 903.2.6.
    f. New and existing Group I-2 occupancies are required to be protected by an automatic sprinkler system in accordance with Sections 903.2.6 and 1103.5 of the International Fire Code.
    g. For new Group I-4 occupancies, see Exceptions 2 and 3 of Section 903.2.6.
    h. New Group R occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.8."
  • (3) In IBC, Table 506.2, "Allowable Area Factor (At = NS, S1, S13R, S13D or SM, as applicable) in Square Feeta, b" delete Type IV and replace it with the following, in relation to the occupancy classification and footnotes as indicated:
    • "OCCUPANCY CLASSIFICATIONSEE FOOTNOTESTYPE OF CONSTRUCTION
    • TYPE IV
    • ABCHT
    • A-1NS45,00030,00018,75015,000
    • S1180,000120,00075,00060,000
    • SM135,00090,00056,25045,000
    • A-2NS45,00030,00018,75015,000
    • S1180,000120,00075,00060,000
    • SM135,00090,00056,25045,000
    • A-3NS45,00030,00018,75015,000
    • S1180,000120,00075,00060,000
    • SM135,00090,00056,25045,000
    • A-4NS45,00030,00018,75015,000
    • S1180,000120,00075,00060,000
    • SM135,00090,00056,25045,000
    • A-5NSULULULUL
    • S1
    • SM
    • BNS108,00072,00045,00036,000
    • S1432,000288,000180,000144,000
    • SM324,000216,000135,000108,000
    • ENS76,50051,00031,87525,500
    • S1306,000204,000127,500102,000
    • SM229,500153,00095,62576,500
    • F-1NS100,50067,00041,87533,500
    • S1402,000268,000167,500134,000
    • SM301,500201,000125,625100,500
    • F-2NS151,500101,00063,12550,500
    • S1606,000404,000252,500202,000
    • SM454,500303,000189,375151,500
    • H-1NSc10,50010,50010,50010,500
    • S1
    • H-2NSc10,50010,50010,50010,500
    • S1
    • SM
    • H-3NSc25,50025,50025,50025,500
    • S1
    • SM
    • H-4NSc, d72,00054,00040,50036,000
    • S1288,000216,000162,000144,000
    • SM216,000162,000121,500108,000
    • H-5NSc, d72,00054,00040,50036,000
    • S1288,000216,000162,000144,000
    • SM216,000162,000121,500108,000
    • I-1NSd, e54,00036,00018,00018,000
    • S1216,000144,00072,00072,000
    • SM162,000108,00054,00054,000
    • I-2NSd, f36,00024,00012,00012,000
    • S1144,00096,00048,00048,000
    • SM108,00072,00036,00036,000
    • I-3NSd, e36,00024,00012,00012,000
    • S1144,00096,00048,00048,000
    • SM108,00072,00036,00036,000
    • I-4NSd, g76,50051,00025,50025,500
    • S1306,000204,000102,000102,000
    • SM229,000153,00076,50076,500
    • MNS61,50041,00025,62520,500
    • S1246,000164,000102,50082,000
    • SM184,500123,00076,87561,500
    • R-1hNSd61,50041,00025,62520,500
    • S13R
    • S1246,000164,000102,50082,000
    • SM184,500123,00076,87561,500
    • R-2hNSd61,50041,00025,62520,500
    • S13R
    • S1246,000164,000102,50082,000
    • SM184,500123,00076,87561,500
    • R-3hNSdULULULUL
    • S13D
    • S13R
    • S1
    • SM
    • R-4hNSd61,50041,00025,62520,500
    • S13D
    • S13R
    • S1246,000164,000102,50082,000
    • SM184,500123,00076,87561,500
    • S-1NS76,50051,00031,87525,500
    • S1306,000204,000127,500102,000
    • SM229,500153,00095,62576,500
    • S-2NS115,50077,00048,12538,500
    • S1462,000308,000192,500154,000
    • SM346,500308,000144,375115,500
    • UNSi54,00036,00022,50018,000
    • S1216,000144,00090,00072,000
    • SM162,000108,00067,50054,000
    For SI: 1 square foot = 0.0929 m2.
    UL = Unlimited; NP = Not Permitted; NS = Buildings not equipped throughout with an automatic sprinkler system; S1 = Buildings a maximum of one story above grade plane equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1; SM = Buildings two or more stories above grade plane equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1; S13R = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.2; S13D = Buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.3.
    a. See Chapters 4 and 5 for specific exceptions to the allowable height in this chapter.
    b. See Section 903.2 for the minimum thresholds for protection by an automatic sprinkler system for specific occupancies.
    c. New Group H occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.5.
    d. The NS value is only for use in evaluation of existing building area in accordance with the IEBC.
    e. New Group I-1 and I-3 occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.6. For new Group I-1 occupancies, Condition 1, see Exception 1 of Section 903.2.6.
    f. New and existing Group I-2 occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.6 and Section 1103.5 of the International Fire Code.
    g. For New Group I-4 occupancies see Exceptions 2 and 3 of Section 903.2.6.
    h. New Group R occupancies are required to be protected by an automatic sprinkler system in accordance with Section 903.2.8.
    i. The maximum allowable area for a single-story nonsprinklered Group U greenhouse is permitted to be 9,000 square feet, or the allowable area shall be permitted to comply with Table C102.1 of Appendix C."
  • (4) In IBC, Section 508.4.4 is deleted and replaced with the following: "508.4.4 Separation. Individual occupancies shall be separated from adjacent occupancies in accordance with Table 508.4."
  • (5) In IBC, Section 508.4.4.1 is deleted and replaced with the following: "508.4.4.1 Construction. Required separations shall be fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 711, or both, so as to completely separate adjacent occupancies. Mass timber elements serving as fire barriers or horizontal assemblies to separate occupancies in Type IV-B or IV-C construction shall be separated from the interior of the building with an approved thermal barrier consisting of a minimum of 1/2 inch (12.7 mm) gypsum board or a material that is tested in accordance with and meets the acceptance criteria of both the Temperature Transmission Fire Test and the Integrity Fire Test of NFPA 275."
  • (6) In IBC, Section 509, a new section is added as follows: "509.4.1.1 Type IV-B and IV-C construction. Where Table 509 specifies a fire-resistance-rated separation, mass timber elements serving as fire barriers or a horizontal assembly in Type IV-B or IV-C construction shall be separated from the interior of the incidental use with an approved thermal barrier consisting of a minimum of 1/2 inch (12.7 mm) gypsum board or a material that is tested in accordance with and meets the acceptance criteria of both the Temperature Transmission Fire Test and the Integrity Fire Test of NFPA 275."




Download our app to see the most-to-date content.