The source of masonry materials which will affect the appearance of the
finished work shall not be changed after the work has started except with
the Contracting Officer's approval. The Contractor has the option to use
either hard metric or substitute inch-pound (soft-metric) masonry products.
If the Contractor decides to substitute inch-pound masonry products, the
following additional requirements shall be met:
a. The dimensions indicated on the drawings shall not be altered
to accommodate inch-pound masonry products either horizontally or
vertically. The 100 mm building module shall be maintained,
except for the actual physical size of the masonry products
themselves.
b.
Mortar joint widths shall be maintained as specified.
c. Indicated reinforcing bar spacing shall not be exceeded.
Inch-pound masonry products shall accommodate reinforcing bar
placement. Reinforcing bars shall not be cut, bent or eliminated
to fit into the inch-pound masonry product modules.
d. Masonry inch-pound products shall not be reduced in size by
more than one-third (1/3) in height and one-half (1/2) in length.
Masonry products shall not be cut at ends of walls, corners, and
other openings.
e. Cut, exposed masonry products shall be held to a minimum and
shall be located where they will have the least impact on the
aesthetics of the facility.
f. Other building components built into the masonry products,
such as window frames, door frames, louvers, fire dampers, etc.,
that are required to be metric, shall remain metric.
g. Additional metric guidance shall conform to Section 01415
METRIC MEASUREMENTS.
2.1.1
Clay or Shale Brick
Clay or shale brick veneer shall be masonry units conforming to ASTM C 216,
Type [FBS] [_____]. Color range and texture shall be as indicated and
shall conform to the approved sample. Grade SW shall be used for all
brickwork. Brick unit sizes shall be [modular] [_____] [as shown].
2.1.2
Concrete Masonry Unit
Concrete masonry unit veneer shall be solid and conform to ASTM C 90.
Architectural type, color range and texture shall be as indicated and shall
conform to the approved sample. Masonry unit sizes shall be [modular]
[_____] [as shown].
2.1.3
Prefaced Concrete Masonry Unit
Prefaced concrete masonry unit veneer shall conform to ASTM C 744 using
masonry units conforming to ASTM C 90. Prefaced concrete unit facing shall
turn over the edges and ends of the unit at least 10 mm 3/8 inch in the
direction of the thickness of the unit to form a lip at least 2 mm 1/16 inch
thick. Variation in color and texture shall not exceed that of the
approved samples. Masonry unit sizes shall be [modular] [_____] [as shown].
SECTION 04810
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