exterior sheathing, moisture barrier, veneer anchors and flashing have been
installed on the cold-formed steel framing system. Extreme care shall be
taken to avoid damage to the moisture barrier and flashing during
construction of the masonry veneer. Any portion of the moisture barrier
and flashing that is damaged shall be repaired or replaced prior to
completion of the veneer. Masonry [shall be placed in running bond
pattern.] [shall be placed in stacked bond pattern. Longitudinal
reinforcement consisting of at least one continuous galvanized steel wire
shall be placed in the veneer wythe. The minimum wire size shall be 9
gauge.] [bond pattern shall be as indicated on the drawings.] Vertical
joints on alternating courses shall be aligned and kept vertically plumb.
Solid masonry units shall be laid in a non-furrowed full bed of mortar,
beveled and sloped toward the center of the wythe on which the mortar is
placed. Units shall be shoved into place so that the vertical mortar
joints are completely full and tight. Units that have been disturbed after
the mortar has stiffened shall be removed, cleaned and relaid. Mortar
which protrudes more than 13 mm 1/2 inch into the cavity space shall be
removed. Means shall be provided to ensure that the cavity space is kept
clean of mortar droppings and other loose debris. Chases and raked-out
joints shall be kept free from mortar and debris. Faces of units used in
finished exposed areas shall be free from chipped edges, material texture
or color defects or other imperfections distracting from the appearance of
the finished work.
3.10.1
Surface Preparation
Surfaces on which masonry is to be laid shall be cleaned of laitance or
other foreign material. No units having a film of water shall be laid.
3.10.2
Hot Weather Construction
Temperatures of masonry units and mortar shall not be greater than 50
degrees C 120 degrees F when laid. Masonry erected when the ambient air
temperature is more than 37 degrees C 99 degrees F in the shade and when
the relative humidity is less than 50 percent shall be given protection
from the direct exposure to wind and sun for 48 hours after the
installation.
3.10.3
Cold Weather Construction
Temperatures of masonry units and mortar shall not be less than 4 degrees C
40 degrees F when laid. When the ambient air temperature is 0 degrees C 32
degrees F or less, masonry veneer under construction shall be protected and
maintained at a temperature greater than 0 degrees C 32 degrees F for a
period of 48 hours after installation. The proposed method of maintaining
the temperature within the specified range shall be submitted for approval
prior to implementation. No units shall be laid on a surface having a film
of frost or water.
3.10.4
Tolerances
Masonry shall be laid plumb, level and true to line within the tolerances
specified in TABLE 1. All masonry corners shall be square unless otherwise
indicated on the drawings.
TABLE 1
Variation From Plumb
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SECTION 04810
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