Specifications - Lord and Son Construction, Inc.

C. Handle acoustical ceiling units carefully to avoid chipping edges or damaging units
in any way. Minor damages may be repaired, provide finish items are equal in all
respects to new work and acceptable to Contracting Officer; otherwise, remove
and replace damaged items as directed.
1.5 PROJECT CONDITIONS
A. Space enclosure - Do not install interior acoustical ceilings until space is enclosed
and weather-proof, until wet work in space is completed and nominally dry, until
work above ceilings is completed, and until ambient conditions of temperature and
humidity will be continuously maintained at values near those indicated for final
occupancy.
PART 2 – PRODUCTS
2.1 MANUFACTURERS
A. Armstrong World Industries
B. USG Corporation
C. CertainTeed Ceilings
2.2 MINERAL FIBER ACOUSTICAL PANELS
A. General: Where units less than 6 inches wide would occur at edges of room with
24 X 24 inch pattern, provide 24 X 48 inch panels cut to extend to wall, eliminating
the tee near the wall. Where tegular tiles occur at these locations, modify tile to sit
flush with suspension system.
B. Type 1 (ACT1), angled tegular:
1. NRC – 0.55; CAC – 35
a. 2’ x 2’ x 5/8” Fine Fissured (1732) by Armstrong.
b. 2’ x 2’ x 5/8” Radar ClimaPlus (2220) by USG
c. 2’ x 2’ x 5/8” Fine Fissured (HHF-154) by Certainteed.
C. Type 2 (ACT2), square edge, wet areas:
1. NRC – 0.55; CAC – 35
a. 2’ x 2’ x 5/8” Fine Fissured (1728) by Armstrong.
b. 2’ x 2’ x 5/8” Radar ClimaPlus (2210) by USG
c. 2’ x 2’ x 5/8” Fine Fissured (HHF-157) by Certainteed.
MAHG121038 09 51 13 - 2 ACOUSTICAL PANEL CEILINGS