than the steel studs, shall conform to ASTM C 955 and be of steel
conforming to ASTM A 653/A 653M, Grade [33] [_____], having a minimum yield
strength of [230] [_____] MPa [33,000] [_____] psi.
2.5
INSULATION
The Contractor shall comply with EPA requirements in accordance with
Section 01670 RECYCLED / RECOVERED MATERIALS.
2.5.1
Blanket Insulation
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NOTE: Insulation specified in ASTM C 665 is
available in three types:
Type I - Blankets with no membrane coverings
(unfaced).
Type II - Blankets with a nonreflective membrane
covering one principal face (kraft paper faced).
Type III - Blankets with a reflective membrane
covering one principal face (foil faced).
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Insulation placed between the steel studs shall be batt or blanket type
mineral wool conforming to ASTM C 665, Type [I] [II] [III].
2.5.2
Rigid Board-Type Insulation
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NOTE: The designer will insert the appropriate
maximum R-Value to be used for the insulation.
Cellular plastic insulation (polystyrene and
polyurethane) are thermally efficient; however,
certain precautions should be observed in their use
due to high smoke development and toxicity of the
smoke generated by the burning of these materials.
In multistory construction, a fire stop should be
provided at each floor.
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Insulation for wall cavities shall be rigid board-type insulation. Rigid
board-type insulation shall be either polystyrene conforming to ASTM C 578,
Type I or II, Grade 2 or polyurethane conforming to ASTM C 591. Insulation
thickness shall be sufficient to provide an R-value of [_____].
2.6
GYPSUM WALLBOARD
Gypsum wallboard that is installed on the interior side of the cold-formed
steel framing system shall be as specified in Section 09250 GYPSUM BOARD.
2.7
EXTERIOR SHEATHING
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NOTE: Select the appropriate sheathing and remove
the other requirements.
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SECTION 04810
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