Page 198 - 2018_IRC

CHAPTER 6

WALL CONSTRUCTION

User note:
About this chapter: Chapter 6 contains prescriptive provisions for the design and construction of walls. The wall construction covered in
Chapter 6 consists of five different types: wood framed, cold-formed steel framed, masonry, concrete and structural insulated panel (SIP). The
primary concern of this chapter is the structural integrity of wall construction and transfer of all imposed loads to the supporting structure.

SECTION R601 R602.1.5 Structural composite lumber. Structural
GENERAL capacities for structural composite lumber shall be estab-
R601.1 Application. The provisions of this chapter shall lished and monitored in accordance with ASTM D5456.
control the design and construction of walls and partitions for R602.1.6 Cross-laminated timber. Cross-laminated tim-
buildings. ber shall be manufactured and identified as required by
R601.2 Requirements. Wall construction shall be capable of ANSI/APA PRG 320.
accommodating all loads imposed in accordance with Section R602.1.7 Engineered wood rim board. Engineered wood
R301 and of transmitting the resulting loads to the supporting rim boards shall conform to ANSI/APA PRR 410 or shall
structural elements. be evaluated in accordance with ASTM D7672. Structural
R601.2.1 Compressible floor-covering materials. Com- capacities shall be in accordance with either ANSI/APA
pressible floor-covering materials that compress more than PRR 410 or established in accordance with ASTM D7672.
1 Rim boards conforming to ANSI/APA PRR 410 shall be
/ inch (0.8 mm) when subjected to 50 pounds (23 kg)
32
applied over 1 inch square (645 mm) of material and are marked in accordance with that standard.
1
greater than / inch (3.2 mm) in thickness in the uncom- R602.1.8 Wood structural panels. Wood structural panel
8
pressed state shall not extend beneath walls, partitions or sheathing shall conform to DOC PS 1, DOC PS 2 or, when
columns, which are fastened to the floor. manufactured in Canada, CSA O325 or CSA O437. Panels
shall be identified for grade, bond classification, and per-
formance category by a grade mark or certificate of
SECTION R602 inspection issued by an approved agency.
WOOD WALL FRAMING R602.1.9 Particleboard. Particleboard shall conform to
R602.1 General. Wood and wood-based products used for ANSI A208.1. Particleboard shall be identified by the
load-supporting purposes shall conform to the applicable pro- grade mark or certificate of inspection issued by an
visions of this section. approved agency.
R602.1.1 Sawn lumber. Sawn lumber shall be identified R602.1.10 Fiberboard. Fiberboard shall conform to
by a grade mark of an accredited lumber grading or ASTM C208. Fiberboard sheathing, where used structur-
inspection agency and have design values certified by an ally, shall be identified by an approved agency as con-
accreditation body that complies with DOC PS 20. In lieu forming to ASTM C208.
of a grade mark, a certification of inspection issued by a
lumber grading or inspection agency meeting the require- R602.1.11 Structural insulated panels. Structural insu-
ments of this section shall be accepted. lated panels shall be manufactured and identified in accor-
dance with ANSI/APA PRS 610.1.
R602.1.2 End-jointed lumber. Approved end-jointed
lumber identified by a grade mark conforming to Section R602.2 Grade. Studs shall be a minimum No. 3, standard or
R602.1 shall be permitted to be used interchangeably with stud grade lumber.
solid-sawn members of the same species and grade. End- Exception: Bearing studs not supporting floors and non-
jointed lumber used in an assembly required elsewhere in bearing studs shall be permitted to be utility grade lumber,
this code to have a fire-resistance rating shall have the des- provided that the studs are spaced in accordance with
ignation “Heat Resistant Adhesive” or “HRA” included in Table R602.3(5).
its grade mark. R602.3 Design and construction. Exterior walls of wood-
R602.1.3 Structural glued-laminated timbers. Glued- frame construction shall be designed and constructed in
laminated timbers shall be manufactured and identified as accordance with the provisions of this chapter and Figures
required in ANSI A190.1, ANSI 117 and ASTM D3737. R602.3(1) and R602.3(2), or in accordance with AWC NDS.
R602.1.4 Structural log members. Structural log mem- Components of exterior walls shall be fastened in accordance
bers shall comply with the provisions of ICC 400. with Tables R602.3(1) through R602.3(4). Wall sheathing
shall be fastened directly to framing members and, where
placed on the exterior side of an exterior wall, shall be capa-

2018 INTERNATIONAL RESIDENTIAL CODE ® 173
Copyrighted © 2017 by, or licensed to, ICC (ALL RIGHTS RESERVED); licensed to UL, LLC pursuant to License Agreement with ICC. No further reproductions authorized or distribution authorized.
ANY UNAUTHROIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT; AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.