Page 287 - 2018_IRC

WALL CONSTRUCTION

TABLE R603.9.5(4)
REQUIRED LENGTH OF FULL-HEIGHT SHEATHING AND ASSOCIATED OVERTURNING ANCHORAGE FOR WALLS SUPPORTING
WALLS WITH STONE OR MASONRY VENEER AND USING 43-MIL COLD-FORMED STEEL FRAMING AND 4-INCH SCREW SPACING ON
THE PERIMETER OF EACH PANEL OF STRUCTURAL SHEATHING
BRACED WALL LINE LENGTH
(feet)
SEISMIC 10 20 30 40 50 60 SINGLE-STORY CUMULATIVE
HOLD-DOWN
HOLD-DOWN
DESIGN STORY
FORCE
FORCE
CATEGORY Minimum total length of braced wall panels required (pounds) (pounds)
along each braced wall line
(feet)
1.9 2.7 3.4 4.2 5.0 5.8 5,928 —
D 0
3.0 4.9 6.8 8.8 10.7 12.6 5,928 11,856

2.3 3.3 4.3 5.2 6.2 7.2 5,928 —
D 1
3.7 6.1 8.5 10.8 13.2 15.6 5,928 11,856

3.3 4.6 6.0 7.4 8.7 10.1 5,928 —
D 2
5.2 8.6 11.9 15.3 18.6 22.0 5,928 11,856

For SI: 1 mil = 0.0254 mm, 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound-force = 4.448 N.

R603.9.5.1 Seismic Design Category C. In Seismic SECTION R605
Design Category C, the length of structural sheathing for PARTICLEBOARD
walls supporting one story, roof and ceiling shall be the R605.1 Identification and grade. Particleboard shall con-
greater of the amounts required by Section R603.9.2, form to ANSI A208.1 and shall be so identified by a grade
except Section R603.9.2.2 shall be permitted. mark or certificate of inspection issued by an approved
R603.9.5.2 Seismic Design Categories D , D and D . agency. Particleboard shall comply with the grades specified
2
0
1
In Seismic Design Categories D , D and D , the in Table R602.3(4).
2
0
1
required length of structural sheathing and overturning
anchorage shall be determined in accordance with
Tables R603.9.5(1), R603.9.5(2), R603.9.5(3), and SECTION R606
R603.9.5(4). Overturning anchorage shall be installed GENERAL MASONRY CONSTRUCTION
on the doubled studs at the end of each full-height wall R606.1 General. Masonry construction shall be designed and
segment. constructed in accordance with the provisions of this section,
TMS 402, TMS 403, or TMS 404.
SECTION R604 R606.1.1 Professional registration not required. Where
WOOD STRUCTURAL PANELS the empirical design provisions of Appendix A of TMS
402, the provisions of TMS 403, or the provisions of this
R604.1 Identification and grade. Wood structural panels section are used to design masonry, project drawings, typ-
shall conform to DOC PS 1, DOC PS 2 or ANSI/APA PRP ical details and specifications are not required to bear the
210, CSA O325 or CSA O437. Panels shall be identified by a seal of the architect or engineer responsible for design,
grade mark or certificate of inspection issued by an approved unless otherwise required by the state law of the jurisdic-
agency. tion having authority.
R604.2 Allowable spans. The maximum allowable spans for R606.2 Masonry construction materials.
wood structural panel wall sheathing shall not exceed the val-
ues set forth in Table R602.3(3). R606.2.1 Concrete masonry units. Concrete masonry
units shall conform to the following standards: ASTM C55
R604.3 Installation. Wood structural panel wall sheathing for concrete brick; ASTM C73 for calcium silicate face
shall be attached to framing in accordance with Table brick; ASTM C90 for load-bearing concrete masonry
R602.3(1) or R602.3(3). units; ASTM C744 for prefaced concrete and calcium sili-

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