ADB Safegate L-858 AGSF Series, User Manual

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3.0 Installation
WARNING
Allow only qualified personnel to perform the following tasks. Observe and follow the safety instructions in this
document and all other related documentation.
Sign installation requires a flat mounting surface and the sign to be level to prevent legend panels from becoming
distorted.
FAILURE TO INSTALL AND LEVEL SIGN WILL VOID THE WARRANTY
See Sign Mounting for detailed instructions. Also see FAA AC 150/5340-30, Figure 126, for concrete base design.
3.1 Introduction
This section provides instructions for installing L-858 taxiway and runway signs. Refer to the airport project plans and
specifications for the specific installation instructions and FAA AC 150/5340-18.
3.2 Unpacking
The equipment is shipped ready for installation. Handle equipment very carefully to prevent component damage. Unpack the
carton upon receipt and check the contents and their condition. Note any exterior damage to the carton that might lead to
detection of equipment damage.
If you note any damage to any equipment, file a claim with the carrier immediately. The carrier may need to inspect the
equipment.
3.3 Sign Installation on Concrete Pad
Note
Follow site plans and specifications for concrete dimensions.
3.3.1 Concrete Pouring
See FAA AC 150/5340-30, Figure 126, for concrete base design. To pour a concrete pad, perform the following procedure:
1. Determine the sign size and module.
2. Pour your concrete pad according to the following requirements:
•
a minimum of 30 inches (762 mm) wide, extending a minimum of 6 inches (152.4 mm) beyond the end of the
supports. The sign pad needs to be flat and level in the area where the sign mounting flanges are located. See FAA AC
150/5345-30, Figure 126. The mounting floor flange is nominally 5.0 inches wide x 7.50 inches long and the area
beyond the flange can be tapered to the outside edge of the concrete pad to provide for pad drainage.
•
a minimum of 4 inches (101.6 mm) depth, extending below the frost line to prevent frost heave.
•
reinforce according to site plans and specifications.
3. Install a minimum of one 12-inch (304.8 mm) L-867B power base (1) according to the following guidelines:
•
Install the base close to the sign in or near the concrete pad to provide easy access to the isolation transformer.
•
When installing the base in the concrete pad, hold the L-867 base firmly in place during construction of the pad so
that the upper surface of the base flange is level within ± 2 degrees and not more than 3/8 inch (9.525 mm) above the
concrete surface.
•
All other bearing surfaces on the pad for additional flange supports should be kept in the same horizontal plane as
the L-867 base flange. The pad area where the sign mounting flanges will be located is to be flat with no taper to
ensure that the sign will set level to prevent uneven loading on the frangible couplings. See FAA AC 150/5340-30,
Figure 126 for pad design.
96A0286, Rev. AT, 2020/09/16 15
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