space filled with [grout] [bricks "floated" in grout] and reinforced as
indicated. Bevel mortar beds away from grout space to prevent projection
into grout space when bricks are shoved in place. Deeply furrowed bed
joints will not be permitted. Lay exterior wythe of brick to the height of
each grout pour in advance of interior wythe. Clean grout space and set
reinforcing before laying interior wythe. Provide metal ties to prevent
spreading of the wythes and to maintain vertical alignment of walls.
Position reinforcing as indicated. Wire vertical reinforcing securely in
position as the brickwork progresses. Use puddling rod or vibrator to
consolidate the grout. The minimum clear distance between parallel bars
shall be the nominal diameter of the bars; the minimum clear distance
between masonry and reinforcing shall be 6 mm 1/4 inch. Unless indicated
or specified otherwise, form splices by lapping bars not less than 40 bar
diameters and wire tying them together. Stagger splices in adjacent
horizontal bars.
3.2.4.7
Chimneys
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NOTE: If a chimney wall is 200 mm (8 inches) or
less in thickness, the space between the flue liner
and brickwork should be kept clean and clear to
avoid cracking the brickwork.
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Construct chimneys of brick with clay flue linings of the sizes indicated.
Extend flue linings from 300 mm 12 inches below the smoke inlet to 100 mm 4
inches above the chimney cap. Place thimbles as indicated, flush with
inside of or up to 25 mm one inch into the flue lining. Set linings in
fire clay mortar or refractory mortar and fill and smooth the joints on the
inside. Set each section of flue lining before surrounding brickwork
reaches top of flue lining section below. Build brickwork around lining,
and [fill the space] [leave a 25 mm one inch airspace] between lining and
brickwork [with grout]. [Seal top of airspace before installing chimney
cap.] Do not cut linings after they are installed in chimney. Unless
indicated otherwise, provide a chimney cap of air-entrained concrete.
Slope cap to a minimum edge thickness of 50 mm 2 inches and reinforce with
two rings of No. 3 gage galvanized steel wire.
3.2.4.8
Brick Veneer
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NOTE: Use this paragraph when cold-formed steel
framing and brick veneer construction is required.
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Provide a continuous cavity as indicated. Install brick veneer after
sheathing, masonry anchors, and flashing have been installed to the
cold-formed steel framing system. Care shall be provided to avoid damaging
the moisture barrier. Damaged moisture barrier and flashing shall be
repaired or replaced before brick veneer is installed. Means shall be
provided to keep cavities clean and clear of mortar droppings.
3.2.5
Tolerances
Masonry shall be laid plumb, true to line, with courses level. Bond
pattern shall be kept plumb throughout. Corners shall be square unless
noted otherwise. Except for walls constructed of prefaced concrete masonry
units, masonry shall be laid within the following tolerances (plus or minus
SECTION 04200
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