Provide glass block units of type[s], size, pattern and style specified.
Do not change source of supply for material which will affect the
appearance of the finished work after work has started. The Contractor
shall have on hand extra units amounting to [5] [_____] percent of the
number of units incorporated in the work. Use extra units to replace units
found to be defective. Provide units made of clear colorless glass.
Provide polyvinyl butyral edge coating. Provide [75] [_____] percent light
transmission allowance. Provide ventilators and accessories recommended by
glass block manufacturer.
2.1.1
Exterior Glass Block Units
Provide [DECORA] [VUE] [ARGUS] [_____] pattern [with LX] [without] fibrous
glass insert, [_____] texture, sized [197 by 197] [_____] by 98 mm [7-3/4
by 7-3/4] [_____] by 3-7/8 inches. Units designated as "reflective glass
block" shall have a highly reflective oxide surface coating of a [gray]
[_____] color.
2.1.2
Interior Glass Block Units
Provide [VUE] [_____] pattern, [197 by 197] [_____] by 76 mm [7-3/4 by
7-3/4] [_____] by 3-1/8 inches.
2.1.3
Solid Glass Block Units
Units shall be [VISTABRIK] [_____], 194 by 194 by 76 mm 7-5/8 by 7-5/8 by 3
inches.
2.1.4
Fire Rated Glass Block Units
Walls and partitions indicated on the drawings to be fire rated and
containing glass block units shall use approved units that have been fire
tested in accordance with ASTM E 119 to the indicated rating.
2.2
MORTAR
2.2.1
Mortar Mix
ASTM C 270, Type S, white portland cement.
2.2.2
Aggregates
ASTM C 144, clean, white quartzite type sand, not less than 100 percent
passing a No. 8 sieve.
[2.2.3
Waterproofing
Provide metallic-stearate-type waterproofing agent. Omit waterproofing
agent if portland cement containing waterproofing agent is used.
]2.2.4
Admixtures
Do not use accelerators or anti-freeze compounds.
2.2.5
Prepackaged Mortar Mix
ASTM C 270, Type S, white portland cement.
SECTION 04270
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