Air Distribution Concepts Flush Rail - Manual (Page 2)

STEP TWO: SUSPENSION HARDWARE
The aluminum flush rail supplied comes in 10 foot sections. Identify rail location and mounting
locations. D-shape systems require side mounting based on 3:00 and 9:00. flush mount rail
must be mounted to a flat surface. Rail can be mounted with rivets or screws to T-Bar or flat
surface of ceiling. If D-shape diffuser is not mounted to a flat surface it will not retain it’s half
round shape. Rails should be mounted the width of the diffuser. The inside distance between
the rails is equal to the diameter minus 1 3/4”. Diffusers can be supplied with air from end or
from top flat area of diffuser. ( See below).
Fittings
When fabric fittings are incorporated in your installation, align rails off centerline of
the system. When elbows are used in the system rail should be installed as indicated
as above. Rail bends and precut rail sections will be provided for suspension of the
elbows. (Note: rail bends may come in two sections, a coupler may be needed to
connect.)
When tee’s or take offs are used Install rail perpendicular to main rail to suspend
branch runs. To insure proper alignment the main of the fabric system can be in-
stalled to the rail and the air handler first. Then the cross rails perpendicular to the
main can be installed to suspend the branch runs. Fittings will have quick connect
joints such as zippers to ease the installation and maintenance of the system.