16 mm 5/8 inch cover from either face. The distance between crosswires
shall not exceed 400 mm 16 inches. Joint reinforcement for straight runs
shall be furnished in flat sections not less than 3 m 10 feet long. Joint
reinforcement shall be provided with factory formed corners and
intersections. If approved for use, joint reinforcement may be furnished
with adjustable wall tie features.
2.13
REINFORCING STEEL BARS AND RODS
Reinforcing steel bars and rods shall conform to ASTM A 615/A 615M, Grade
60.
2.14
CONTROL JOINT KEYS
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NOTE: Control joint keys are generally not required
vertically between the floor line or grade to other
floor lines or roofs and no shear transfer is
required across control joints. Delete paragraph
when not required. Control joints will be detailed
on the drawings. When control joint keys are not
required by design, the control joint detail will
show the head joint completely filled with mortar
for the width of the wythe; but joints will be
flush, raked, or raked and sealed as required.
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Control joint keys shall be a factory fabricated solid section of natural
or synthetic rubber (or combination thereof) conforming to ASTM D 2000or
polyvinyl chloride conforming to ASTM D 2287. The material shall be
resistant to oils and solvents. The control joint key shall be provided
with a solid shear section not less than 16 mm 5/8 inchthick and 10 mm 3/8
inch thick flanges, with a tolerance of plus or minus 2 mm 1/16 inch. The
control joint key shall fit neatly, but without forcing, in masonry unit
jamb sash grooves. The control joint key shall be flexible at a
temperature of minus 34 degrees C minus 30 degrees F after five hours
exposure, and shall have a durometer hardness of not less than 70 when
tested in accordance with ASTM D 2240.
2.15
INSULATION
2.15.1
Rigid Board-Type Insulation
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NOTE: Insert the appropriate thickness and R-Value
to be used for the insulation. The total R-value
for the insulation and the total thickness of the
insulation must be coordinated to fit the space
provided within the wall cavity. The thickness of
the insulation must allow for not less than 19 mm
(3/4 inch) air space between the insulation and the
facing veneer. This will limit the insulation
thickness to 50 mm (2 inches) in a 70 mm (2-3/4
inch) cavity space. If greater insulation thickness
is required the masonry wall must be designed to
provide a larger cavity.
To assure adequate competition, an R-value should be
chosen that allows several products to meet the
SECTION 04200
Page 34
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