Envirco MAC-T Ceiling Grid System - Manual (Page 6)

MAC-T Ceiling Grid System
2” Heavy Duty for Cleanroom
6 Innovators in Clean Air Technology | www.envirco.com | Operation & Maintenance
I n s t a l l a t i o n & S e r v i c e M a n u a l
■ Installation of Wall Angle
The first component to be installed is the wall angle. Attach lengths of wall angle to walls using appropriate fasteners for the
type of existing wall. It is advisable to pick one wall as a starting point and begin attaching wall angle from the center of the
wall towards the corners. A laser or other suitable leveling tool should be used to assure a consistently level finished product.
Continue attaching wall angle around walls and columns, if any, until complete. The wall angle sections are connected at the
intersections with appropriate fastener into the existing wall.
■ Wall Angle at Corners
The wall angle is to be cut using a miter saw (with the proper cutting blade) at 45 degrees in the field by the installation team
to create corners.
■ Installation of T-Bar
Once the wall angle is installed, the rest of the grid installation can begin. The extruded aluminum sections are connected at
the intersections with the 4-way zinc alloy die castings. The bottom of this casting has an open face channel that embraces
the top extruded screw boss of the main runners and cross bar sections. The castings are bolted to the extrusion with 1⁄4-20 x
3/4” full threaded Phillips head cap screws. This is most easily done with a power drill or other such tool. The grid is suspended
with 3/8”-16 threaded rod for which the castings are already tapped.
The castings will accept a special right hand/left hand (RH-LH) threaded rod to allow for use with turnbuckles. The RH-LH
threaded rod should be turned into the casting and “bottom out” on the main runner. Turnbuckles are not a requirement for
secure suspension. However, in that case, some other means of leveling the grid system should be used.
Hang all of the threaded rods, turnbuckles and castings at the appropriate 2’ x 4’ or 4’ x 4’ centers (nominal) and then bolt
main runners (12’) lengths into place. The cross tees may then be bolted in using a 24 1⁄2” x 48 1⁄2” on center configuration.
(This may vary depending on your grid layout).
■ Installation of Gasket
The gasket should come factory applied. If it does not, perform the following. The Envirco system provideds 1/8” x 3/8” gasket
tape is usually applied to the extruded grid members prior to installation. After unpacking the part, the surface of the extrusion
is cleaned using a solution of isopropyl alcohol and water. The gasket tape is then applied with the adhesive side down, leaving
approximately 3/4” to 1” extra gasket material on each end of the cross tees to allow for a proper seal of the gaskets at the
grid intersection.