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ESR-1308 | Most Widely Accepted and Trusted Page 3 of 21 cross runners to wall molding at the ceiling perimeter. The clip is similar to the BERC-2 clip, described below, except the horizontal leg of the BERC clip is shorter than that of the BERC-2. 3.4 BERC-2 and AL BERC-2 Clips: The BERC-2 and AL BERC-2 clips are illustrated in Figure 2. The clips are used to connect main and cross runners to wall molding at the ceiling perimeter. The BERC-2 clip is manufactured from 0.034-inch-thick (0.864 mm), hot-dipped galvanized, cold-rolled steel complying with ASTM A568. The AL BERC-2 clip is fabricated from 0.034-inch-thick (0.864 mm) 3003-H16 or 3105 H16 Aluminum. 3.5 STAC and XTAC Clip: The Single Tee Adapter Clip (STAC) is illustrated in Figure 4. The STAC clip is used to connect cross runners to main runners in off-module and staggered grid installations. The cross runners must have a minimum steel substrate thickness of 0.015-inch. The connection capacity between main runner and cross runner exceed 180 lbf (81.5 kg). The STAC clip is manufacturered from 0.046-inch thick (1.17 mm), hot-dipped galvanized, cold-rolled steel compling with ASTM A568. The Cross Tee Adapter Clip (XTAC) is illustrated in Figure 2. The XTAC clip is used to connect cross runners to main runners in off-module and staggered grid installations. The cross runners must have a minimum steel substrate thickness of 0.015-inch. The connection capacity between main runner and cross runner exceeds 180 lbf (81.5 kg). The XTAC clip is manufacturered from 0.050-inch thick(1.27 mm), hot-dipped galvanized, cold-rolled steel complying with ASTM A568. 3.6 Accessories: Each framing system has accessory items that include support angles and corner caps. Steel for accessory items is manufactured from hot-dipped galvanized, cold-rolled steel complying with ASTM A568 and ASTM A653. 3.6.1 TechZone Yoke (TZYK): The TechZone Yoke (TZYK) is illustrated in Figure 5. The TZYK is used in ceiling framing systems with continuous lighting and diffuser configurations; each yoke assembly requires 2 single yokes and when assembled create either 4-inch (101.6 mm), 6-inch (152.4 mm), or 8-inch (203.2 mm) widths. The TZYK is manufactured from 0.050-inch thick (1.27 mm) hot-dipped galvanized, extruded steel complying with ASTM A653. 4.0 DESIGN AND INSTALLATION 4.1 General: The suspended ceiling framing system must be installed in accordance with this report and the manufacturer’s published installation instructions. The suspended ceiling framing system must be installed in accordance with IBC Sections 808, 1613 and 2506.2.1 for ceiling systems up to 4 psf (19.5 kg/m2). 4.2 Main Runners: Main runners must be installed and leveled to within 1/4 inch in 10 feet (6.4 mm in 3048 mm), with the supporting wire taut. Vertical support hanger wire must be installed within 3 inches (51 mm) of the main runner fire expansion relief. The design loads for main runners must be less than or equal to the capacities allowed in Table 2 of this report. Supports for the main runners that consist of vertical hangers, perimeter hangers, and lateral force bracing must be installed in accordance with the applicable code. 4.3 Cross Runners: Main runners, or other cross runners, must support cross runners to within 1/32 inch (0.80 mm) of the required center- to-center spacing. This tolerance must be noncumulative beyond 12 feet (3658 mm). Intersecting runners must be installed to form a right angle to the supporting members. The maximum design load capacities for cross runners must be less than or equal to the capacities allowed in Table 3 of this report. 4.4 Seismic Design: 4.4.1 Seismic Design Requirements: Seismic design and installation details of the ceiling systems, excluding 730145 main runner, and XL7325 and XL7345 cross runners, must be in accordance with Section 13.5.6 of ASCE 7-16 for the 2021 and 2018 IBC [ASCE 7-10 for the 2015 and 2012 IBC and ASCE 7-05 for the 2009 IBC]; as referenced in IBC Section 1613, except as noted in Section 4.4.2 of this report. Systems classified as intermediate-duty are limited to use in Seismic Design Categories A, B and C. 4.4.2 Ceiling Framing Systems with BERC, BERC- 2,and AL BERC-2 Clips: 4.4.2.1 Alternate Installation with BERC-2 and AL BERC-2 Clips, for Seismic Design Categories D, E and F: Under this installation, the main runner must be rated heavy-duty and have a minimum simple span allowable uniform load of 16.35 pounds per lineal foot (238 N/m); with a maximum ceiling weight permitted for systems with BERC-2 or XTAC clips at 4 pounds per square foot (19.5 kg/m2); with a maximum celling weight permitted for systems with AL BERC-2 clip at 2 pounds per square foot (9.75 kg/m2). With this installation under Section 4.4.2.1, the main and cross runners must be as described in Table 2 and 3 of this report. The BERC-2, XTAC, and AL BERC-2 clips are used to secure the main runners and cross runners to the wall molding, as detailed below and shown in Figure 2. A nominally 7/8-inch (22 mm) wall molding is used in lieu of the 2-inch (51 mm) perimeter supporting closure angle required by Section 5.2.2 of ASTM E580 and Section 13.5.6.2.2 of ASCE 7-16 for the 2021 and 2018 IBC [ASCE 7-10 for the 2015 and 2012 IBC and Section 13.5.6.2.2 (b) of ASCE 7-05 for the 2009 IBC] for Seismic Design Categories D, E and F. The ceiling system must be as prescribed by the applicable code except for the use of the BERC-2, XTAC, and AL BERC-2 clips and the 7/8-inch (22 mm) wall molding and elimination of spreader bars. The BERC-2 and AL BERC-2 clips are attached to the wall molding by sliding the locking lances over the hem of the vertical leg of the wall molding(see Figure 2). Under the 2021 and 2018 IBC, as required by Section 13.5.6.2.2 of ASCE 7-16, either BERC-2 or AL BERC-2 clips must be screwed to the wall molding with a total of two (2) screws (see Figure 2), and the wall molding must be positively attached to the wall studs or other supporting structure. BERC-2,and AL BERC-2 clips installed on the two adjacent walls where the runners must be fixed (attached wall), are attached to the runner by a No. 7 by 7/16-inch long (minimum) self-piercing sheet metal screw through the fixed hole in the clip and the top flange bulb of the runner. XTAC clips installed on the two adjacent walls where the runners must be fixed (attached wall), are attached to wall molding by two No. 7 x 7/16-inch long (minimum) self-piercing sheet metal screws through the vertical leg of the wall molding and to runners by two No. 7 x 7/16-inch long (minimum) self- piercing sheet metal screws through the web of the runner. BERC-2, or AL BERC-2 clips installed on opposite walls where the runners must not be fixed to the clips (unattached 2130 E 17th St - 10111279406/07/23