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ESR-1308 | Most Widely Accepted and Trusted Page 4 of 21
<br />walls), the clips must not be mechanically connected to the
<br />runner by any fastener and must allow the terminal runner
<br />end to move3/4 inch (19.1 mm) towards and away from the
<br />wall, and installation of a No. 7 by 7/16-inch long (minimum)
<br />self-piercing sheet metal screw through the horizontal
<br />slotted hole is optional, as shown in Figure 2.
<br />BERC-2,AL BERC-2, or XTAC clips installed in this
<br />manner are an acceptable means of preventing runners
<br />from spreading in lieu of spacer bars (stabilizer bars)
<br />required in Section 5 of ASTM E580 for the 2021, 2018,
<br />2015 and 2012 IBC (CISCA 3-4 for the 2009 IBC). ASTM
<br />E580 is referenced in ASCE 7, which is referenced in the
<br />2021, 2018, 2015 and 2012 IBC Section 1613 (CISCA 3-4
<br />is referenced in ASCE 7-05, Section 13.5.6.2.2, which is
<br />referenced in 2009 IBC Section 1613). The assemblies
<br />described in in this Section 4.4.2.1 are equivalent to that
<br />required by CISCA 3-4 and Section 5 of ASTM E580. See
<br />Figure 2.
<br />A single 1/8-inch-diameter (3.175 mm) steel pop rivet
<br />complying with Industrial Fastener Institute Standard
<br />IFI-114 may be used in lieu of BERC-2, XTAC, and AL
<br />BERC-2 perimeter clips to secure the main runners and
<br />cross runners to the wall molding on two adjacent walls
<br />(attached walls). The center of the rivet must be 0.25 inch
<br />(6.35 mm) from the edge of the wall angle. See Figure 2.
<br />4.4.2.2 Alternate Installation with BERC-2 and
<br />TechZone Yoke (TZYK) for Seismic Design Categories
<br />D, E and F: Under this installation, the 7501 main runner
<br />must be used, with a maximum ceiling weight permitted for
<br />systems with BERC-2 clips at 3.35 pounds per square foot
<br />(16.4 kg/m2), The BERC-2 clips are used to secure the main
<br />runners and cross runners to the wall molding, as detailed
<br />below and shown in Figure 2. A nominally 7/8-inch (22 mm)
<br />wall molding is used in lieu of the 2-inch (51 mm) perimeter
<br />supporting closure angle required by Section 5.2.2 of ASTM
<br />E580 and Section 13.5.6.2.2 of ASCE 7-16 for the 2021 and
<br />2018 IBC [ASCE 7-10 for the 2015 and 2012 IBC and
<br />Section 13.5.6.2.2 (b) of ASCE 7-05 for the 2009 IBC] for
<br />Seismic Design Categories D, E and F. The ceiling system
<br />must be as prescribed by the applicable code except for the
<br />use of the BERC-2 clips and the 7/8-inch (22 mm) wall
<br />molding and elimination of spreader bars.
<br />The BERC-2 clips are attached to the wall molding as
<br />specified in section 4.4.2.1 of this report.
<br />Each TZTK yoke assembly must be suspended from
<br />structure with a vertical 12 gauge steel wire through the
<br />center hole of the top of the yoke assembly. Alternatively,
<br />the yoke assembly can be suspended from two hanger
<br />wires secured through the holes at the corners of the yoke
<br />assembly. The yoke assembly must be attached to the main
<br />runners and to the cross tees using a single 1/8-inch-
<br />diameter (3.175 mm) steel pop rivet complying with
<br />Industrial Fastener Institute Standard IFI-114 at 24 inches
<br />(609.6 mm) from the perpendicular end of the main runner
<br />and spaced at every 48 inches (1219.2 mm) on center. All
<br />lighting fixtures must be installed in accordance with Section
<br />5.3 of ASTM E580.
<br />In lieu of splay wire bracing in accordance with Section
<br />5.2.8 of ASTM E580, rigid bracing members composed of
<br />2½-inch (63.5 mm) wide by 25 gage steel studs must be
<br />attached to the web of the main runner using self-tapping
<br />screws. The two rigid bracing members splayed 90 degrees
<br />from each other at an angle of 45 degrees from the plan of
<br />the ceiling. The location and spacing of the rigid bracing
<br />members must comply with Section 5.2.8 of ASTM E580. In
<br />addition to the rigid bracing members, a compression post
<br />composed of a 2 ½-inch (63.5 mm) wide 25 gage steel stud
<br />connected to the main runner. The length of the bracing
<br />members must be designed by a registered design
<br />professional.
<br />4.4.2.3 Alternate Installation with BERC, BERC-2and AL
<br />BERC-2 Clips, for Seismic Design Category C: Terminal
<br />ends of the runners are secured by attaching either the
<br />BERC, BERC-2, XTAC or AL BERC-2 clip to the wall
<br />molding and attaching the runners to the clip. The runners
<br />have zero clearance at the perimeter on two adjacent walls
<br />(attached walls) and 3/8-inch (9.5 mm) clearance on the
<br />opposite walls (unattached walls), as detailed in this section
<br />and shown in Figures 2 & 3. The BERC or BERC-2 clip is
<br />attached to the wall molding by sliding the locking lances
<br />over the hem of the vertical leg of the wall molding; the AL
<br />BERC-2 clip also requires an additional No. 7 by 7/16-inch
<br />long (minimum) self-piercing sheet metal screw through the
<br />clip and into the wall molding. When the runners must be
<br />fixed (attached walls) at two adjacent walls, attach a No.7
<br />by 7/16-inch long self-piercing screw through the fixed hole
<br />of a BERC-2 or AL BERC-2 clip and the top flange bulb of
<br />the runner, or through the fixed hole of a BERC clip and into
<br />the web of the runner. XTAC clips may be used in lieu of
<br />BERC, BERC-2 or AL BERC-2 perimeter clips to secure the
<br />main runners and cross runners to the wall molding on two
<br />adjacent walls (attached walls). XTAC clips are attached by
<br />two No. 7 x 7/16-inch long (minimum) self-piercing sheet
<br />metal screws through the vertical leg of the wall molding and
<br />to runners by two No. 7 x 7/16-inch long (minimum) self-
<br />piercing sheet metal screws through the web of the runner.
<br />BERC-2, AL BERC-2, or BERC clips installed on opposite
<br />walls where the runners must not be fixed to the clips
<br />(unattached walls), the clips must not be mechanically
<br />connected to the runner by any fastener and must allow the
<br />terminal runner end to move 3/8-inch (9.5 mm) towards and
<br />away from the wall, and installation of a No. 7 by 7/16-inch
<br />long (minimum) self-piercing sheet metal screw through the
<br />horizontal slotted hole is optional, as shown in Figure 2.
<br />BERC or BERC-2 or XTAC or AL BERC-2 clips installed
<br />in this manner are an acceptable means of preventing
<br />runners from spreading, in lieu of spacer bars (stabilizer
<br />bars) required in Section 4 of ASTM E580, which is
<br />referenced in Section 13.5.6.2.1 of ASCE 7-16 under the
<br />2021 and 2018 IBC Section 1613 [ASCE 7-10 under the
<br />2015 and 2012 IBC Section 1613; and Section 13.5.6.2.1
<br />and CISCA 0-2 as referenced in ASCE 7-05 under the 2009
<br />IBC Section 1613]. Except for the use of the BERC or
<br />BERC-2 or XTAC or AL BERC-2 clip as noted above,
<br />installation of the ceiling system must be as prescribed by
<br />the applicable code. The maximum ceiling weight permitted
<br />is 2.5 pounds per square foot (12.2 kg/m2) for ceiling
<br />systems using BERC or BERC-2 or XTAC clips and 2 psf
<br />(9.75 kg/m2) for ceiling systems using the AL BERC-2 clip.
<br />With this installation, the main and cross runners must be
<br />as described in Tables 2 and 3 of this report, except for
<br />CleanRoom AL series (EA7900C, EA7920C, and EA7940C)
<br />and CleanRoom Steel series (ES7901C, ES7920C and
<br />ES7940C).
<br />The assemblies described in this Section 4.4.2.3 are
<br />equivalent to that required by Section 4 of ASTM E580,
<br />which is referenced in Section 13.5.6.2.1 of ASCE 7-16
<br />under 2021 and 2018 IBC Section 1613 [ASCE 7-10 under
<br />the 2015 and 2012 IBC Section 1613; and Section
<br />13.5.6.2.1 and CISCA 0-2, as referenced in ASCE 7-05
<br />under the 2009 IBC Section 1613] A single 1/8-inch-diameter
<br />(3.175 mm) steel pop rivet complying with Industrial
<br />Fastener Institute Standard IFI-114 may be used in lieu of
<br />BERC-2, XTAC, AL BERC-2, and BERC perimeter clips to
<br />secure the main runners and cross runners to the wall
<br />2130 E 17th St -
<br />10111279406/07/23
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