Okla. Admin. Code § 748:20-2-12

Current through Vol. 42, No. 3, October 15, 2024

Section 748:20-2-12 - IBC 2018 Chapter 7 Fire and Smoke Protection Features

Chapter 7 of the Oklahoma adopted IBC[®] 2018 is adopted with the following modifications:

(1) Section 706.8 Openings. This section has been modified to require openings in double fire walls constructed in accordance with NFPA® 221 to be protected using one fire door or fire shutter assembly in each separate wall. A third exception to the section has been added for fire protection assemblies, ratings and markings for openings in double fire walls constructed in accordance with NFPA® 221 that meet the fire rating indicated in Table 706.8. This section has been modified to read: 706.8 Openings. Each opening through a fire wall shall be protected in accordance with Section 716 and shall not exceed 156 square feet (15 square meters). Openings in double fire walls, constructed in accordance with NFPA® 221, shall be protected using one fire door or fire shutter assembly in each separate wall. The aggregate width of openings at any floor level shall not exceed 25 percent of the length of the wall. Exceptions:

(A) Openings are not permitted in party walls constructed in accordance with Section 706.1.1.

(B) Openings shall not be limited to 156 square feet (15 square meters) where both buildings are equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1.

(C) Fire protection assemblies, ratings and markings for openings in double fire walls, constructed in accordance with NFPA® 221, shall meet the fire rating indicated in Table 706.8.

(2) Table 706.8 Opening Fire Protection Assemblies, Ratings and Markings for Double Fire Walls Constructed in Accordance with NFPA® 221. This table has been added to the code to provide the requirements for constructing double fire walls in accordance with NFPA® 221. The table has been added to read: Table 706.8 Opening Fire Protection Assemblies, Ratings and Markings for Double Fire Walls Constructed in Accordance with NFPA® 221. The table contains 4 rows and 9 columns, as described below:

(A) Row 1 contains the headers for each column, which are listed below in order from column one through column nine:

(i) Row 1, column 1 heading is entitled "Required Single Fire Wall Assembly Rating (Hours)."

(ii) Row 1, column 2 heading is entitled "Each Wall of the Double Fire Wall Assembly Rating (Hours)."

(iii) Row 1, column 3 heading is entitled "Minimum Fire Door and Fire Shutter Assembly Rating (Hours)."

(iv) Row 1, column 4 heading is entitled "Door Vision Panel Size" and includes a superscript letter "a" after the word "Size."

(v) Row 1, column 5 heading is entitled "Fire Rated Glazing Marking Door Vision Panel" and includes superscript letters "b" and "c" after the word "Panel."

(vi) Row 1, column 6 heading is entitled "Minimum Sidelight/Transom Assembly Fire-Protection Rating (Hours)."

(vii) Row 1, column 7 heading is entitled "Minimum Sidelight/Transom Assembly Fire-Resistance Rating (Hours)."

(viii) Row 1, column 8 heading is entitled "Fire-Protection Rated Glazing Marking Sidelight/Transom Panel (Hours)."

(ix) Row 1, column 9 heading is entitled "Fire-Resistance Rated Glazing Marking Sidelight/Transom Panel (Hours)."

(B) Row 2 contains the following information in each of the nine columns listed for the header row number 1:

(i) Row 2, column 1 contains the number "4."

(ii) Row 2, column 2 contains the number "3."

(iii) Row 2, column 3 contains the number "3."

(iv) Row 2, column 4 contains the wording "See note a."

(v) Row 2, column 5 contains the wording "D hyphen H hyphen W hyphen 180."

(vi) Row 2, column 6 contains the wording "Not Permitted."

(vii) Row 2, column 7 contains the number "3."

(viii) Row 2, column 8 contains the wording "Not Permitted."

(ix) Row 2, column 9 contains the wording "W hyphen 180."

(C) Row 3 contains the following information in each of the nine columns listed in the header row number 1:

(i) Row 3, column 1 contains the number "3."

(ii) Row 3, column 2 contains the number "2."

(iii) Row 3, column 3 contains the number and wording "1 hyphen one half."

(iv) Row 3, column 4 contains the wording "100 sq. in."

(v) Row 3, column 5 contains the wording "less than or equal to 100 sq. in. equals D hyphen H hyphen 90, greater than 100 sq. in. equals D hyphen H hyphen W hyphen 90"

(vi) Row 3, column 6 contains the wording "Not Permitted."

(vii) Row 3, column 7 contains the number "2."

(viii) Row 3, column 8 contains the wording "Not Permitted."

(ix) Row 3, column 9 contains the wording "W hyphen 120."

(D) Row 4 contains the following information in each of the nine columns listed in the header row number 1:

(i) Row 4, column 1 contains the number "2."

(ii) Row 4, column 2 contains the number "1."

(iii) Row 4, column 3 contains the number "1."

(iv) Row 4, column 4 contains the wording "100 sq. in."

(v) Row 4, column 5 contains the wording "less than or equal to 100 sq. in. equals D hyphen H hyphen 60, greater than 100 sq. in. equals D hyphen H hyphen W hyphen 60"

(vi) Row 4, column 6 contains the wording "Not Permitted."

(vii) Row 4, column 7 contains the number "1."

(viii) Row 4, column 8 contains the wording "Not Permitted."

(ix) Row 4, column 9 contains the wording "W hyphen 60."

(E) Several footnotes are provided under the table with the following wording:

(i) "For SI: 1 square inch equals 645.2 mm"

(ii) Footnote a. Fire-resistance-rated glazing tested to ASTME E-119 in accordance with Section 716.1.2.3 shall be permitted, in the maximum size tested.

(iii) Footnote b. Under the column heading "Fire-rated glazing marking door vision panel," W refers to the fire-resistance rating of the glazing, not the frame.

(iv) Footnote c. See Section 716.1.2.2.1 and Table 716.1(1) for additional permitted markings.

(3) Table 721.1(2) Rated Fire-Resistance Periods for Various Walls and Partitions. This table has been modified to correct errata published by the ICC, in Row 16, Sub-rows 1, 2 and 3. This table has been modified to read: Table 721.1(2) Rated Fire-Resistance Periods for Various Walls and Partitions. Following the table title are the three superscript letters: "a," "o," and "p" to indicate those footnotes are applicable to the entire table. The table contains 17 rows and 4 columns. Column 4 contains 4 subcolumns. The table is described below.

(A) Row 1 contains the headers for the table and are listed below:

(i) Row 1, column 1 is entitled "Material."

(ii) Row 1, column 2 is entitled "Item Number."

(iii) Row 1, column 3 is entitled "Construction."

(iv) Row 1, column 4 is entitled "Minimum Finished Thickness Face-to-Face (inches). A superscript letter "b" is after the wording "Face-to-Face" before the word "(inches)" to indicate footnote "b" applies. The subcolumns are listed below:

(I) Row 1, column 4, subcolumn 1 is entitled "4 hours."

(II) Row 1, column 4, subcolumn 2 is entitled "3 hours."

(III) Row 1, column 4, subcolumn 3 is entitled "2 hours."

(IV) Row 1, column 4, subcolumn 4 is entitled "1 hour."

(B) Row 2 lists the material type entitled "1. Brick of clay or shake" and contains 4 subrows. No changes have been made to this row or any subrow.

(C) Row 3 lists the material type entitled "2. Combination of clay brick and load-bearing hollow clay tile" and contains 2 subrows. No changes have been made to this row or any subrow.

(D) Row 4 lists the material type entitled "3. Concrete masonry units" and contains four subrows. No changes have been made to this row or any subrow.

(E) Row 5 lists the material type entitled "4. Solid concrete" and contains superscript letters "h" and "i" after the word concrete. The row contains four subrows. No changes have been made to this row or any subrow.

(F) Row 6 lists the material type entitled "5. Glazed or unglazed facing tile, nonload bearing" and contains eight subrows. No changes have been made to this row or any subrow.

(G) Row 7 lists the material type entitled "6. Solid gypsum plaster" and contains six subrows. No changes have been made to this row or any subrow.

(H) Row 8 lists the material type entitled "7. Solid perlite and Portland cement." No changes have been made to this row.

(I) Row 9 lists the material type entitled "8. Solid neat wood fibered gypsum plaster." No changes have been made to this row.

(J) Row 10 lists the material type entitled "9. Solid wall board partition." No changes have been made to this row.

(K) Row 11 lists the material type entitled "10. Hollow (studless) gypsum wallboard partition" and contains two subrows. No changes have been made to this row or any subrow.

(L) Row 12 lists the material type entitled "11. Noncombustible studs-interior partition with plaster each side" and contains four subrows. No changes have been made to this row or any subrow.

(M) Row 13 lists the material type entitled "12. Wood studs-interior partition with plaster each side" and contains four subrows. No changes have been made to this row or any subrow.

(N) Row 14 lists the material type entitled "13. Noncombustible studs-interior partition with gypsum wallboard each side" and contains three subrows. No changes have been made to this row or any subrow.

(O) Row 15 lists the material type entitled "14. Wood studs-interior partition with gypsum wallboard each side" and contains six subrows. No changes have been made to this row or any subrow.

(P) Row 16 lists the material type entitled "15. Exterior or interior walls (continued) and contains twenty subrows. No changes have been made to this row or any subrow.

(Q) Row 17 lists the material type entitled "16. Exterior walls rated for fire resistance from the inside only in accordance with Section 705.5" and contains three subrows.

(i) Subrow 1 lists the Item Number entitled "16-1.1" with a superscript letter "q" has been modified to correct the Type X gypsum wallboard size from 4 inches wide to 4 feet wide in the construction requirements of column 3.

(I) This subrow has been modified to read: 2" x 4" wood studs at 16" centers with double top plates, single bottom plate; interior side covered with 5/8" Type X gypsum wallboard, 4' wide, applied horizontally unblocked, and fastened with 2 1/4" Type S drywall screws, spaced 12" on center, wallboard joints covered with paper tape and joint compound, fastener heads covered vertically, horizontal joints blocked and fastened with 6d common nails (bright) - 12" on center in the field, and 6" on center panel edges. Cavity to be filled with 3 1/2" mineral wool insulation. Rating established for exposure from interior side only.

(II) No changes have been made to column 4 or any subcolumn.

(ii) Subrow 2 lists the Item Number entitled "16-1.2" with the superscript letter "q" has been modified to correct the Type X gypsum wallboard size from 4 inches to 4 feet wide in the construction requirements of column 3.

(I) This subrow has been modified to read: 2" x 6" wood studs at 16" centers with double top plates, single bottom plate; interior side covered with 5/8" Type X gypsum wallboard, 4' wide, applied horizontally or vertically with vertical joints over studs and fastened with 2 1/4" Type S drywall screws, spaced 12" on center, wallboard joints covered with paper tape and joint compound, fastener heads covered with joint compound, exterior side covered with 7/16" wood structural panels fastened with 6d common nails (bright) spaced 12" on center in the field and 6" on center along the panel edges. Cavity to be filled with 5 1/2" mineral wool insulation. Rating established from the gypsum-covered side only.

(II) No changes have been made to column 4 or any subcolumn.

(iii) Subrow 3 lists the Item Number entitled "16-1.3" with the superscript letter "q" has been modified to correct the size of the Type X gypsum wallboard size from 4 inches to 4 feet wide in the construction requirements of column 3.

(I) This subrow has been modified to read: 2" x 6" wood studs at 16" centers with double top plates, single bottom plates; interior side covered with 5/8" Type X gypsum wallboard, 4' wide, applied vertically with all joints over framing or blocking and fastened with 2 1/4" Type S drywall screws spaced 7" on center. Joints to be covered with tape and joint compound. Exterior covered with 3/8" wood structural panels, applied vertically with edges over framing or blocking and fastened with 6d common nails (bright) at 12" on center in the field and 6" on center on panel edges. R-19 mineral fiber insulation installed in the stud cavity. Rating established from the gypsum-covered side only.

(II) No changes have been made to column 4 or any subcolumn.

(R) No changes have been made to any of the footnotes to the table.

Okla. Admin. Code § 748:20-2-12

Reserved by Oklahoma Register, Volume 37, Issue 24, September 1, 2020, eff. 8/3/2020

Adopted by Oklahoma Register, Volume 38, Issue 24, September 1, 2021, eff. 9/14/2021