Daktronics CH-836H - Manual (Page 7)

Installation 2-1
Section 2 : Installation
2.1 General System
Reference Drawings: Pwr/Sig Entrance, 1 Driver Display ............. Drawing A-46755
System Layout, CH-836 .............................. Drawing A-47101
Display Splice Mounting Detail, CH-836H .. Drawing A-47102
Display Mounting, CH-836H ....................... Drawing A-47108
Installation Specifications, CH-836H........... Drawing A-47109
Component Locations, CH-836H ................ Drawing A-47112
Connector Plate, CH-836H ......................... Drawing A-47128
Color Code, 25-Pin J-Box ........................... Drawing A-47207
Refer to Drawing A-47101 for the general system layout.
The general procedure for installing the CH-836H display is as follows:
1. Select beam and footing recommendations from the table in Section 2.2.
2. Dig the footing holes and install the beams and the footings.
3. Route power and signal cables to the display and control locations.
4. Mount the displays to the beams as described in Drawings A-47102, A-47108, and A-47109
and Section 2.3.
5. Route power and signal wires into the displays as described in Drawings A-46755, A-47112,
A-47128, and A-47207 and Section 2.4.
2.2 Beam and Footing Selection
Reference Drawings: Installation Specifications, CH-836H ........... Drawing A-47109
The table below contains recommendations for W-shape beams and footings to support the
display as shown in Drawing A-47109. The first column is wind velocity in miles per hour. The
distance in the second column is from the ground to the bottom of the display. The choice from
these columns depends upon the display location.
The beams listed below are beams which provide maximum wind load strength for the weight and
cost of the beams.
Wind Speed Height (ft) Beam
Section
Footing Depth x
Diameter
70 10 W 10x19 7 ½ ftx3 ft
MPH 15 W 10x25 8 ¼ ftx3 ft
80 10 W 10x25 8 ½ ftx3 ft
MPH 15 W 10x29 9 ¼ ftx3 ft
90 10 W 14x26 9 ½ ftx3 ft
MPH 15 W 12x31 10 ½ ftx3 ft
The calculations for footing diameters and depths are based on the assumption that footings are in
undisturbed soils, not fill soils. Lateral bearing capacity of 300 psf per foot of depth in natural
grade was used to derive these figures.