3.7
REINFORCING STEEL
Reinforcement shall be cleaned of loose, flaky rust, scale, grease, mortar,
grout, or other coating which might destroy or reduce its bond prior to
placing grout. Bars with kinks or bends not shown on the drawings shall
not be used. Reinforcement shall be placed prior to grouting. Unless
otherwise indicated, vertical wall reinforcement shall extend to within 50
mm 2 inches of tops of walls.
3.7.1
Positioning Bars
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NOTE: Positioning of bars will be shown on the
drawings.
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Vertical bars shall be accurately placed within the cells at the positions
indicated on the drawings. A minimum clearance of 13 mm 1/2 inch shall be
maintained between the bars and masonry units. Minimum clearance between
parallel bars shall be one diameter of the reinforcement. Vertical
reinforcing may be held in place using bar positioners located near the
ends of each bar and at intermediate intervals of not more than 192
diameters of the reinforcement. Column and pilaster ties shall be wired in
position around the vertical steel. Ties shall be in contact with the
vertical reinforcement and shall not be placed in horizontal bed joints.
3.7.2
Splices
Bars shall be lapped a minimum of 48 diameters of the reinforcement.
Welded or mechanical connections shall develop at least 125 percent of the
specified yield strength of the reinforcement.
3.8
JOINT REINFORCEMENT INSTALLATION
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NOTE: Location of horizontal joint reinforcement
should be shown on the drawings with the maximum
vertical spacing normally being 400 mm (16 inches).
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Joint reinforcement shall be installed at
400 mm 16 inches on center or as
indicated. Reinforcement shall be lapped
not less than 150 mm 6 inches.
Prefabricated sections shall be installed
at corners and wall
intersections. The longitudinal wires of
joint reinforcement shall be
placed to provide not less than 16 mm 5/8
inch cover to either face of the
unit.
3.9
PLACING GROUT
Cells containing reinforcing bars shall be filled with grout. Hollow
masonry units in walls or partitions supporting plumbing, heating, or other
mechanical fixtures, voids at door and window jambs, and other indicated
spaces shall be filled solid with grout. Cells under lintel bearings on
each side of openings shall be filled solid with grout for full height of
openings. Walls below grade, lintels, and bond beams shall be filled solid
with grout. Units other than open end units may require grouting each
course to preclude voids in the units. Grout not in place within 1-1/2
hours after water is first added to the batch shall be discarded.
SECTION 04200
Page 50
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