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1. Floor Assembly — Min 4-1/2 in. thick reinforced lightweight or normal weight (100-150 pcf) structural concrete. Perimeter of floor assembly to be
provided with min 4 by 4 by 1/4 in. thick cast-in-place structural steel angle for weld-attachment of mullion mounting clips (Item 2A).
2. Curtain Wall Assembly — The curtain wall assembly shall incorporate the following construction features:
A. Mullion Mounting Clips — Min 4 in. long angles with one nom 4 in. leg for attachment to edge of floor assembly and with one leg approx 4 in.
longer than distance to nearest face of mullion. Clips welded to steel angle at edge of floor assembly (Item 1) on each side of vertical mullion
(Item 2B) at each floor level. Top edge of each mounting angle to be recessed min 1/2 in. below top surface of floor.
B. Framing — The rectangular tubing mullions (vertical members) and transoms (horizontal members) shall be minimum 2-1/2in. wide by 5 in.
deep and shall be formed from min 0.100 in. thick aluminum. Mullions spaced max 60 in. OC and secured to mullion mounting clips (Item 2A)
at each floor level with two 1/2 in. diam by 4 in. long hex head steel bolts in conjunction with steel nuts and washers. Interior face of mullions
to be max 8 in. from edge of floor assembly. Transoms framing top and bottom edges of spandrel panels (Item 2C) to be spaced min 72 in.
OC. Transom forming sill of vision panel (Item 2D) to be located such that its bottom surface is at height of 33 in. above the top surface of the
floor (Item 1).
C. Spandrel Panels — Nom 1/8 in. thick aluminum panels with 1/4 in. thick edges. Each panel secured in position with aluminum pressure plates
in conjunction with gaskets and steel screws.
D. Vision Panels — Nom 1/4 in. thick transparent heat-strengthened glass. Each panel secured in position with aluminum pressure plates in
conjunction with glazing gaskets and steel screws.
E. Spandrel Panel Perimeter Angles — Nom 1-1/2 by 1-1/2 in. No. 22 gauge galvanized steel angles installed around entire perimeter of each
spandrel panel. Angles recessed from interior face of framing as necessary to accommodate thickness of curtain wall insulation (Item 2H).
Angles notched as necessary to be continuous over mullion mounting clips (Item 2A). Angles screw-attached to mullions and transom along
sides and top of each spandrel panel with No. 10 by 1/2 in. long self-drilling, self-tapping steel screws spaced max 12 in. OC. Angle along
bottom of each spandrel panel to be screw-attached to leg of angle on mullion at each end without any direct attachment to transom.
F. Stiff Back Channel — Nom 2-1/2 in. wide by 7/8 in. deep hat-shaped channel formed of 22 gauge galv steel to be installed to stiffen curtain
wall insulation between mullions above, below and at elevation of safing joint. One stiff back channel to be located with its centerline approx 6
in. below floor and one stiff back channel to be located with its centerline approx 6 in. above floor. A third stiff back channel is to be located
near the midheight of the safing joint. A clearance of 1/4 to 1/2 in. shall be maintained between the ends of the stiff back channels and the
mullions. Stiff back channel secured to mullion at each end with channel attachment clip (Item 2G) in conjunction with a No. 8 by 1/2 in. long
self-drilling, self-tapping wafer head steel screw or a 3/16 in. diam steel bolt with nut and washer.
G. Channel Attachment Clips — Nom 1-1/2 by 2-1/2 by 1-1/2 in. long angle formed of 16 gauge galv steel. The 2-1/2 in. leg is provided with a
1/4 in. wide by 1-1/2 in. long slot along its centerline for attachment of the stiff back channel. Clips secured to mullion mounting clips (Item 2A)
and mullions, through perimeter angles, with two No. 10 by 1/2 in. long self-drilling, self-tapping steel screws. Channel clips installed with 2-1/2
in. leg recessed from interior face of mullion to accommodate thickness of curtain wall insulation (Item 2H).
H. Curtain Wall Insulation* — Min 2 in. thick mineral wool board insulation, unfaced or faced on one side with aluminum foil/scrim vapor retarder,
supplied in min 36 in. wide boards. Insulation boards to be installed with no vertical seams. A full-width board shall be centered at the
midheight of floor and tightly-fitted between vertical mullions, flush with interior surface of framing. The centered board shall be secured to the
stiff back channels (Item 2F) located approx 6 in. above and below the floor with cup head weld pins (Item 2J) spaced max 10 in. OC along
each channel. The remainder of the spandrel panel framing above and below the centered full-width board shall be filled in with additional
lengths of board cut to fit tightly between mullions and with the horizontal seams between board sections tightly butted. The boards shall be
secured to the spandrel panel perimeter angles with cup head weld pins at each corner of each board and spaced max 10 in. OC. When faced
boards are used, butted seams to be covered with min 4 in. wide aluminum foil tape.
ROXUL INC — CurtainRock 80
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System No. CW-S-2030
CWS 2030
Reproduced by HILTI, Inc. Courtesy of
Underwriters Laboratories, Inc.
September 18, 2008
F Rating — 2 Hr
T Rating — 1/4 Hr
Integrity Rating — 2 Hr
Insulation Rating — 1/4 Hr
Linear Opening Width —8 In. Max