Specifications

08/20/10 04220-2
PART 3 EXECUTION
3.01 EXAMINATION
A. Verify that field conditions are acceptable and are ready to receive Work.
B. Verify items provided by other Sections of Work are properly sized and located.
C. Verify that built-in items are in proper location and ready for roughing into masonry.
3.02 INSTALLATION
A. Mix mortar and place in accordance with the premix mortar manufacturer's instructions.
B. Mix mortar materials mechanically for not less than five minutes after all ingredients are in the
mixer.
C. Do not use mortar that has begun to set or that has been mixed for more than two hours.
Retempering will not be allowed.
D. Maintain masonry courses to uniform dimension. Form vertical and horizontal joints of uniform
thickness. Lay block plumb, level, and true to line.
E. Install horizontal joint reinforcement in the first course above the footing or floor level, and in
every second course thereafter. Do not displace reinforcement while placing mortar.
F. Bond each course at corners and intersections.
G. Do not shift or tap masonry units after mortar has achieved initial set. Where adjustment must be
made, remove mortar and replace.
H. Masonry partitions are to be isolated from vertical structural framing members with a control
joint where indicated on the Drawings.
I. Lintels are to be provided over all openings in concrete block walls not spanned by beams.
Provide minimum 8 inches bearing on each side of opening.
J. All masonry units are to be handled carefully. Use of chipped or broken units is not acceptable.
K. Saw-cut all partial masonry units to fit.
L. Masonry to be plastered or permanently concealed are to have all joints trowel- struck flush.
M. Exposed Masonry: Point joints and tool before mortar is set. Jointing tools must be of high-grade
steel that will not blacken joints. Brush with a clean fiber brush after tooling.
3.03 CLEANING
A. Remove excess mortar and mortar smears.
B. Replace defective mortar. Match adjacent Work.
C. Use non-metallic tools in cleaning operations.
END OF SECTION