Standards
CertainTeed ceiling suspension components
are roll formed to meet or exceed ASTM C 635, and to conform
to direct hung structural classifications of Light (5.0-11.9
lbs.). Intermediate (12.0-15.9 lbs.) or Heavy Duty (16.0
or more lbs.) Metal thicknesses comply with the United States
Standard Revised Manufacturers Gage Table, but metal thickness
is subject to mill tolerances.
General Installation Requirements
CertainTeed's suspended ceiling systems
are designed and tested for specifications and use in interior
applications only. The manufacturer should be consulted for
recommendations regarding exterior applications. Installation
should be done only when the temperature and humidity closely
approximate the interior conditions that will exist when
the building is occupied. The heating and cooling systems
should be operating to maintain these conditions prior to,
during and after installation. Special attention should be
given to proper ventilation of the plenum, especially in
high moisture areas.
Prior to the start of installation, all exterior widows and doors are
to be in place, glazed and weather-stripped, the roof is to be watertight
and all wet trades work is to be completed and thoroughly dry. Mechanical,
electrical or other utility service work above the ceiling plane are
also to be completed. No materials should rest against or wrap around
the ceiling suspension components or the wires that suspend or brace
them.
All direct hung components are to be properly leveled, suspended and
tightly tied with at least three full turns by not less than 12 gage
(2.05mm) galvanized steel wire. Load test recommendations are not to
be exceeded, nor should the components be deflected more than 1/360th
of their span.
ICBO Evaluation Report
See ICBO Evaluation Service,
Inc., Evaluation Report No. ER-1905 for allowable values
and/or condition of uses concerning material presented in
this document. It is subject to re-examination, revision
and possible cancellation.
Metric Specifications
CertainTeed Suspension Ceiling Systems
are available in metric lengths with corresponding metric
slotting. To further assist specifiers with metric needs.
CertainTeed will provide metric conversion dimensioning when this
method of measurement is desired. "Soft" or "hard" metric
conversion dimensioning is available, please specify when
ordering. To order a product in metric measurement or request
metric conversion dimensioning for specification, treat your
needs as a "Made to Order Product Request". |
