2.3
ACCESSORIES
2.3.1
Horizontal Joint Reinforcement
Fabricate from cold drawn steel wire, ASTM A 82. Wire shall be zinc coated
after fabrication by the hot-dip process conforming to ASTM A 153/A 153M,
Class B-2. Reinforcement shall consist of two or more parallel
longitudinal wires not lighter than 9 gauge (3.40 mm 0.1483 inch) weld
connected with cross wires not lighter than 14 gauge (2.03 mm 0.0800 inch)
at not greater than 200 mm 8 inches on center. Provide at least one
longitudinal wire for each face of glass block, out-to-out spacing
approximately 37 mm 1-1/2 inches less than the actual width of the block.
Provide joint reinforcement in flat sections, not less than 2400 mm 8 feet
long, except that corner reinforcements and other special shapes may be
shorter.
2.3.2
Panel Anchors
2.3.2.1
Strip Anchor
Perforated steel strip not less than 0.9 mm 20 gauge, minimum of 45 mm wide
by 600 mm long 1-3/4 inches wide by 24 inches long and galvanized after
fabrication.
2.3.2.2
Wire-Type Anchor
Steel wire not less than 3.4 mm 9 gauge of approved design suitable for use
with the panel stiffener provided and galvanized after fabrication.
2.3.3
Expansion Strip
Dense fibrous glass batt or material as recommended by the glass block
manufacturer.
2.3.4
Packing
Polyethylene foam, neoprene, or filler as recommended by the sealant
manufacturer.
PART 3
EXECUTION
3.1
INSTALLATION
Do not lay glass block when the air temperature is 5 degrees C 40 degrees F
and falling, or when it appears probable that temperatures below 5 degrees
C 40 degrees F will be encountered before the mortar has set, unless
protection is provided to prevent freezing. Protection shall consist of
maintaining the temperature of glass block and mortar materials between 5
and 50 degrees C 40 and 160 degrees F. After erection, maintain air
temperature above 5 degrees C 40 degrees F on both sides of glass block for
not less than 72 hours. Do not work with or on frozen materials. Glass
block work may be started at 1 degree C 34 degrees F on a rising
thermometer. Coordinate glass block work with the work of other trades to
accommodate built-in items.
3.1.1
Workmanship
Carry glass block work up level and plumb all around. Build in window
frames and doors as work progresses. Handle glass block with care to avoid
SECTION 04270
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