DOCUMENT 1218
REV. B
Instruction Manual
AGS-LED
312 LED Series
300mm and 400mm
5
9.4.
Anchor Bolt Installation
a.
We recommend installing cast in place, ½” diameter 18-8 or 316 stainless steel, anchor
bolts during the installation of the concrete foundation/pad. The threaded portion of the
anchor studs should be 41mm [1-5/8”] minimum to 48mm [1-7/8”] maximum above the
top of the concrete foundation/pad. This requires that the anchor studs be installed
accurately. See
Figures 19 and 20, pgs. 46 and 47,
for the floor flange hole pattern
template, and
Figures 8, 9, and 10, pgs. 33, 34, and 35
for leg spacing. The clearance
slots on the floor flange are oversized for use with ½” anchor studs.
9.5.
Concrete Pad Component Information
a.
The concrete foundation/pad should include the series isolation transformer housing,
FAA Type L-867. It is recommended that this housing
not be
located under the sign
power leg to allow access to the series isolation transformer and connections for ease of
troubleshooting and servicing.
[ If the power leg is located on top of an isolation
transformer base, then a FAA type L-868 base, 24 inches deep should be used. This base
top flange surface would be installed ¾ inches above the level concrete surface, or flush
with a ¾ inch spacer ring on the top flange. No gasket is to be used. An AP 1852
baseplate (2 ½ inch NPSM threaded hub [ This is nut 2-11 ½ NPSM thread ] ) shall be
used to accommodate the frangible leg thread. Frangible leg grooves need to be at the
same height to achieve intended wind load resistance.] This housing would be on the side
closest to the Taxiway or Runway. See
Figure 11, pg. 36,
for sign to airfield diagram.
b.
A 50 mm [2”] conduit elbow with threaded coupling attached at sign end would exit from
the transformer housing side to the foundation/pad and be flush with the with the top of
the concrete foundation/pad grade level centered between the floor flange bolts nearest
the Taxiway or Runway side of the sign. See
Figure 12, pg. 39,
for conduit elbow
installation information.
c.
The sign as viewed will have the electronics enclosure to the left, on the “
A
” side of the
sign, which is closest to the Taxiway or Runway side of the sign. The sign side
identification is important with regards to its sign panel legend. See
Figure 11, pg. 36,
for sign to airfield diagram.
d.
A grounding rod and clamp should be installed in order to ground the electronics
enclosure. See
Figure 11, pg. 36,
for sign to airfield diagram.
WARNING
:
NOTICE
DO NOT connect a counterpoise system to the sign ground or its
grounding rod.