Page 327 - 2018_IRC

WALL CONSTRUCTION

Horizontal reinforcement placed above and below located as required by the applicable detail in Figure
an opening shall extend beyond the edges of the open- R608.7(2). Where the vertical reinforcement required by
ing the dimension required to develop the bar in tension this section is used to satisfy the requirements of Section
in accordance with Section R608.5.4.4. R608.7.2.2.2 in waffle- and screen-grid walls, a concrete
Exception: Continuous horizontal wall reinforce- flange shall be created at the ends of the solid wall seg-
ment placed within 12 inches (305 mm) of the top of ments in accordance with Table R608.7(4), Note e. In
the wall story as required in Sections R404.1.3.2 and the top-most story, the reinforcement shall terminate in
R608.6.2 is permitted in lieu of top or bottom lintel accordance with Section R608.6.4.
reinforcement required by Section R608.8.2 provided R608.8.2 Lintels. Lintels shall be provided over all open-
that the continuous horizontal wall reinforcement ings equal to or greater than 2 feet (610 mm) in width. Lin-
meets the location requirements specified in Figures tels with uniform loading shall conform to Sections
R608.8(2), R608.8(3), and R608.8(4) and the size R608.8.2.1 and R608.8.2.2, or Section R608.8.2.3. Lintels
requirements specified in Tables R608.8(2) through supporting concentrated loads, such as from roof or floor
R608.8(10). beams or girders, shall be designed in accordance with ACI
R608.8.1.2 Vertical reinforcement. Not less than one 318.
No. 4 bar [Grade 40 (280 MPa)] shall be provided on R608.8.2.1 Lintels designed for gravity load-bearing
each side of openings equal to or greater than 2 feet (610 conditions. Where a lintel will be subjected to gravity
mm) in width. The vertical reinforcement required by load conditions 1 through 5 of Table R608.8(1), the clear
this section shall extend the full height of the wall story span of the lintel shall not exceed that permitted by
and shall be located within 12 inches (305 mm) of each Tables R608.8(2) through R608.8(8). The maximum
side of the opening. The vertical reinforcement required clear span of lintels with and without stirrups in flat walls
on each side of an opening by this section is permitted to shall be determined in accordance with Tables
serve as reinforcement at the ends of solid wall segments R608.8(2) through R608.8(5), and constructed in accor-
in accordance with Section R608.7.2.2.2, provided it is

SEE FIGURES R608.8(2),
CONTINUOUS BAR AS REQUIRED R608.8(3) AND R608.8(4)
BY SECTION R608.6.2 SHALL BE
PERMITTED TO BE USED AS LINTEL
REINFORCMENT WHERE LOCATED TOP AND BOTTOM
AS SHOWN IN FIGURES R608.8(2) CENTER DISTANCE, LINTEL REINFORCEMENT
R608.8(3) AND R608.8(4) A, NOT REQUIRING AS REQUIRED—SEE
FLAT AND WAFFLE-GRID- STIRRUPS SECTION R608.8.2
8 IN. MIN. SCREEN-GRID-
12 IN. MIN.
TOP OF
WALL STORY
A

* *
<2F T
≥ 2FT

* *
SEE
SECTION R608.8.1
OPENING REINFORCEMENT
AS REQUIRED
WALL REINFORCEMENT
AS REQUIRED
VERTICAL REINFORCEMENT BESIDE OPENING.
* LENGTH REQUIRED TO SEE SECTION R608.8.1.2
DEVELOP BAR IN TENSION-
SEE SECTION R608.8.1.1
ELEVATION OF WALL
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
FIGURE R608.8(1)
REINFORCEMENT OF OPENINGS

302 2018 INTERNATIONAL RESIDENTIAL CODE ®
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