Specifications - Lord and Son Construction, Inc.

2. Provide “retention clips” at all areas of Type 2 (equal to Armstrong 414).
2.2 CEILING SUSPENSION MATERIALS
A. General: Comply with ASTM C635, as applicable to type of suspension system
required for type of ceiling units indicated. Coordinate with other work supported
by or penetrating through ceilings, including light fixtures and HVAC equipment.
1. Structural Class: Intermediate-duty.
B. Attachment Devices: Size for 5 times design load indicated in ASTM C635, Table
1 Direct Hung. Hanger Wires-galvanized carbon steel, ASTM A641, soft temper,
prestretched, yield-stress load of at least 3 times design load, but not less than 12
gage (0.106").
C. Edge Molding: provide manufacturer’s standard wall angle (7/8” hemmed angle
molding) for edges of ceiling of material and finish to match exposed tee flanges in
same space unless otherwise noted below.
D. Exposed Suspension System: Manufacturer's standard exposed tees, cross tees
and accessories of types indicated, with exposed cross tees coped to lay flush
with main runners. Hot dipped galvanized steel on all surfaces of ceiling
suspension system, including mouldings, trim and accessories.
E. Suspension System:
1. For “ACT1” and “ACT2” Ceilings:
a. Prelude XL 15/16” Exposed Tee Grid System by Armstrong.
b. Donn DX 15/16” Exposed Tee Grid System by USG.
c. Classic Stab System 15/16” Exposed Tee Grid System by Certainteed.
PART 3 – EXECUTION
3.1 EXAMINATION
A. Installer must examine conditions under which acoustical ceiling work is to be
performed and must notify Contractor in writing of unsatisfactory conditions. Do
not proceed with work until unsatisfactory conditions have been corrected in
manner acceptable to installer.
3.2 PREPARATION
A. Measure each ceiling area and establish layout of acoustical units to balance
border widths at opposite edges of each ceiling – in accordance with approved
coordination layout drawing.
MAHG121038 09 51 13 - 3 ACOUSTICAL PANEL CEILINGS