Programming Documents for Pre-K for SA - The City of San Antonio

A third type of conduit support is a one piece conduit hanger. This is a device that is
manufactured in such a way that the compression bolt is part of the hanger itself and, when
loosened, it will not come off the hanger. This type of hanger can be mounted directly to the
building structure, to red iron, or to a specialized hanger mount.
8.2.6 Surface Raceway
Surface raceway is available in both metallic and nonmetallic versions. When installing surface
raceway, follow manufacturer’s instructions. Metallic surface raceway shall be bonded to the
equipment grounding system.
8.3 Spaces
8.3.1 Plywood
Plywood backboards are recommended to be installed around the entire perimeter of rooms
(e.g., telecommunications room). This will allow cables to be installed and terminated around
the walls of the room, now or in the future. It may also facilitate attaching cables that pass
through vertically to rooms above or below.
A minimum of two walls should be covered with rigidly fixed 0.75 inch A-C grade plywood,
preferably void free, 8 ft high, capable of supporting attached equipment. The plywood should
be installed with the “A” grade side exposed and the “C” grade side against the building wall or
structure. Plywood should be either fire-rated or covered with two coats of fire retardant paint
as required by the City Of San Antonio, ITSD.
Plywood sheets used for backboards should be installed with the longest dimension reaching
from the floor level up toward the ceiling to its 8 ft height. Plywood shall be installed in such a
manner that there is no separation between adjacent sheets. When installing plywood in a
corner, the plywood backboard shall be installed to form a smooth, tight, gap-free corner.
The plywood backboard shall be secured on top of existing drywall or to wall studs of the
room. When installing plywood on drywall, which has already been installed on metal studs,
verify the load rating of the wall before installing the plywood. If the load rating will permit
this type of installation, use a minimum of 0.25 inch toggle bolts (butterfly bolts) to ensure the
stability of the installation. Toggle bolts should be installed at approximately 24 inch spacing
around the entire perimeter of the plywood sheet. The toggle bolts should be installed 2 inches
from the edges of the sheet of plywood on 24 inch centers.
8.3.2 Equipment Racks
Equipment racks should meet the requirements of ANSI/EIA-310-D. Equipment racks shall be
secured to the building structure and should be accessible from the front and rear. Typical
spacing is 36 inches in front and back of the rack, and 30 inches on the sides. Where equipment
racks are separated from a wall, cable trays should be installed from the wall to the top of the
equipment racks. This provides a pathway for cables to be routed between equipment racks.
Transitions between cable trays and equipment racks shall be equipped with a means that
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