Slats shall be approximately 32 to 38 mm 1-1/4 to 1-1/2 inch wide with a
depth of crown of 13 mm 1/2 inch. Alternate slats shall be fitted with end
locks to maintain curtain alignment. Bottom of curtain shall be provided
with angle or tubular bar reinforcement matching the curtain, and fitted
with a resilient bottom seal.
2.1.2
Jamb Guides
Guides shall be of [3 mm 1/8 inch minimum thickness extruded aluminum
conforming to ASTM B 221M ASTM B 221, Alloy 6063, and shall be fitted with
neoprene silencers or replaceable heavy nap striping to eliminate noise and
dust infiltration.] [2.278 mm 13 gauge minimum thickness stainless steel
conforming to ASTM A 240/A 240M, Type 304 or Type 430.] [2.278 mm 13 gauge
minimum thickness galvanized steel angles conforming to ASTM A 653/A 653M,
Coating Designation [G60] [G90].]
2.1.3
Counterbalance Shaft Assembly
The curtain shall be coiled around a steel tube of sufficient thickness and
diameter to prevent deflection exceeding 2.5 mm per meter 0.03 inch per foot.
The barrel shall contain oil tempered helical steel torsion springs
capable of sufficient torque to counterbalance the weight of the curtain.
Springs shall be calculated to provide a minimum of [7,500] [_____]
operating cycles (one complete cycle of door operation will begin with the
door in the closed position, move to the full open position and return to
the closed position).
2.1.4
Brackets
Brackets shall be a minimum 2.657 mm 12 gauge thickness steel if flat
plate, or 1.519 mm 16 gauge thickness if there are a minimum of 3 returns
of 19 mm 3/4 inch width.
2.1.5
Hood
The hood shall be of [1.02 mm 0.040 inch minimum thickness aluminum sheet
conforming to ASTM B 209M ASTM B 209, Alloy 5005.] [0.607 mm 24 gauge
stainless steel conforming to ASTM A 240/A 240M, Type 304 or Type 430.] [
0.607 mm 24 gauge galvanized steel conforming to ASTM A 653/A 653M, Coating
Designation [G60] [G90].]
2.1.6
Locks
The curtain shall be locked at [each side of the bottom bar by an integral
slide bolt suitable for padlocks by others] [both sides of bottom bar by a
chrome-plated cylinder lock keyed into the building keying system]. Lock
shall be on the [_____] room side of the counter door. [[Pad locks] [and]
[keying] shall [conform to Section 08710 DOOR HARDWARE] [be as shown].]
2.2
ROLLING COUNTER DOOR (NON-RATED)
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NOTE: Standard non-rated rolling counter doors may
be constructed of aluminum, steel or stainless
steel. Operation may be manual push-up, manual
crank with removable handle, or motor operation.
Edit the specification for the type or types of
rolling doors required for the project.
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SECTION 08331A
Page 7
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