Page 290 - 2018_IRC

WALL CONSTRUCTION

TABLE R606.3.4.1 stopping all tiers at the same elevation and with the
MINIMUM CORROSION PROTECTION
grout 1 inch (25 mm) below the top.
MASONRY METAL STANDARD
ACCESSORY R606.3.5.2 Cleanouts. Provisions shall be made for
Joint reinforcement, interior walls ASTM A641, Class 1 cleaning the space to be grouted. Mortar that projects
1
more than / inch (12.7 mm) into the grout space and any
2
Wire ties or anchors in exterior walls ASTM A641, Class 3 other foreign matter shall be removed from the grout
completely embedded in mortar or grout
space prior to inspection and grouting. Where required
Wire ties or anchors in exterior walls not ASTM A153, Class B-2 by the building official, cleanouts shall be provided in
completely embedded in mortar or grout the bottom course of masonry for each grout pour where
Joint reinforcement in exterior walls or the grout pour height exceeds 64 inches (1626 mm). In
interior walls exposed to moist environ- ASTM A153, Class B-2 solid grouted masonry, cleanouts shall be spaced hori-
ment zontally not more than 32 inches (813 mm) on center.
Sheet metal ties or anchors exposed to ASTM A153, Class B-2 The cleanouts shall be sealed before grouting and after
weather inspection.
Sheet metal ties or anchors completely ASTM A653, Coating R606.3.5.3 Construction. Requirements for grouted
embedded in mortar or grout Designation G60 masonry construction shall be as follows:
Stainless steel hardware for any exposure ASTM A167, Type 304 1. Masonry shall be built to preserve the unob-
structed vertical continuity of the cells or spaces
R606.3.5 Grouting requirements. to be filled. In partially grouted construction,
R606.3.5.1 Grout placement. Grout shall be a plastic cross webs forming cells to be filled shall be full-
mix suitable for pumping without segregation of the bedded in mortar to prevent leakage of grout.
constituents and shall be mixed thoroughly. Grout shall Head and end joints shall be solidly filled with
be placed by pumping or by an approved alternate mortar for a distance in from the face of the wall
method and shall be placed before any initial set occurs or unit not less than the thickness of the longitu-
1
and not more than 1 / hours after water has been dinal face shells.
2
added. Grout shall be consolidated by puddling or 2. Vertical reinforcement shall be held in position at
mechanical vibrating during placing and reconsolidated top and bottom and at intervals not exceeding 200
after excess moisture has been absorbed but before diameters of the reinforcement.
plasticity is lost. Grout shall not be pumped through
aluminum pipes. 3. Cells containing reinforcement shall be filled sol-
idly with grout.
Maximum pour heights and the minimum dimen-
sions of spaces provided for grout placement shall con- 4. The thickness of grout or mortar between
form to Table R606.3.5.1. Grout shall be poured in lifts masonry units and reinforcement shall be not less
1
1
with a maximum height of 8 feet (2438 mm). Where a than / inch (6.4 mm), except that / -inch (6.4
4
4
total grout pour exceeds 8 feet (2438 mm) in height, the mm) bars shall be permitted to be laid in horizon-
1
grout shall be placed in lifts not exceeding 64 inches tal mortar joints not less than / inch (12.7 mm)
2
(1626 mm) and special inspection during grouting shall thick, and steel wire reinforcement shall be per-
be required. If the work is stopped for 1 hour or longer, mitted to be laid in horizontal mortar joints not
the horizontal construction joints shall be formed by less than twice the thickness of the wire diameter.
TABLE R606.3.5.1
GROUT SPACE DIMENSIONS AND POUR HEIGHTS
MINIMUM WIDTH OF MINIMUM GROUT b, c SPACE DIMENSIONS FOR
GROUT POUR MAXIMUM HEIGHT
GROUT TYPE GROUT SPACES a, b GROUTING CELLS OF HOLLOW UNITS
(feet)
(inches) (inches × inches)
1 0.75 1.5 × 2
5 2 2 × 3
Fine
12 2.5 2.5 × 3
24 3 3 × 3
1 1.5 1.5 × 3
5 2 2.5 × 3
Coarse
12 2.5 3 × 3
24 3 3 × 4
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
a. For grouting between masonry wythes.
b. Grout space dimension is the clear dimension between any masonry protrusion and shall be increased by the horizontal projection of the diameters of the
horizontal bars within the cross section of the grout space.
c. Area of vertical reinforcement shall not exceed 6 percent of the area of the grout space.

2018 INTERNATIONAL RESIDENTIAL CODE ® 265
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