inches on center vertically. Joint reinforcement shall not be placed in
the same masonry course as veneer anchors unless the anchors are designed
to accommodate the wire. Joint reinforcement shall be placed so that
longitudinal wires are centered in the veneer wythe for solid units.
Longitudinal wires shall be fully embedded in mortar for their entire
length. Splices in joint reinforcement shall be lapped a minimum of 150 mm
6 inches. Joint reinforcement must be discontinuous at all veneer joints.
The minimum cover for joint reinforcement is 16 mm 5/8 inches.
3.10.10
Veneer Joints
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NOTE: Unless both brick and concrete masonry units
are being used, choose the appropriate type of joint
for the masonry unit that is used.
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[Brick expansion joints] [and] [concrete masonry veneer joints] shall be
provided at the locations shown on the drawings. Details of joints shall
be as indicated on the drawings. Joints shall be clean and free of mortar
and shall contain only backer rod and sealant, installed in accordance with
Section 07920 JOINT SEALANTS. Horizontal reinforcement shall not extend
through the joints.
3.10.11
Weep Holes
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NOTE: The maximum spacing of the open head joint
weep holes should be specified as 600 mm (24 inches).
Weep holes details and required spacings should be
shown on a wall section, along with the flashing
details, on the drawings.
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Weep holes shall be provided at all flashing locations at intervals of
[600] [400] mm. [24] [16] inches. Weep holes shall be placed in head
joints just above the flashing. Weep holes shall be formed by leaving head
joints open or head joint vents may be used. Weep holes shall be kept free
of mortar and other obstructions.
3.10.12
Head Joint Vents
Head joint vents shall be provided near the top of the veneer wythe at the
same spacing as the weep holes.
3.10.13
Discontinuous Work
When necessary to temporarily discontinue the work, masonry shall be
stepped back for joining when work resumes. Toothing may be used only when
specifically approved. Before resuming work, loose mortar shall be removed
and the exposed joint shall be thoroughly cleaned. Top of walls subjected
to rain or snow shall be covered with nonstaining waterproof covering or
membrane when work is not in process. Covering shall extend a minimum of
600 mm 2 feet down on each side of the wall and shall be held securely in
place.
SECTION 04810
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