Daktronics CH-1318V - Manual (Page 7)

Installation 2-1
Section 2 : Installation
2.1 General
System
Reference Drawings: Pwr/Sig Entrance, 1 Driver Display ............. Drawing A-46755
Color Code, 25-Pin J-Box ........................... Drawing A-47207
System Layout, CH-1318V.......................... Drawing A-47498
Footing & Beam, CH-1318V........................ Drawing A-47512
Display Mounting, CH-1318V...................... Drawing A-47517
Electrical Installation, CH-1318V ................ Drawing A-47519
Component Locations, CH-1318V .............. Drawing A-47520
Refer to Drawing A-47498 for the general system layout.
The general procedure for installing the CH-1318V display is as follows:
1. Select beam and footing recommendations from the table located below.
2. Dig the footing holes and install beams and footings.
3. Route power and signal cables to the display and control locations.
4. Mount the displays to the beams as described in Section 2.3 and Drawings A-47512 and
A-47517.
5. Route power and signal wires into the displays as described in Section 2.4 and Drawings
A-47519, A-47520, A-46755 and A-47207.
2.2
Beam and Footing Selection
Reference Drawing: Footing & Beam, CH-1318V .......................... Drawing A-47512
The table below contains recommendations for W-shape beams and footings to support the
display as shown on Drawing A-47512. 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 Dia.
70 mph 10 W8 x 15 4 ¾ ft x 3 ft
15 W6 x 20 5 ½ ft x 3 ft
80 mph 10 W8 x 15 5 ½ ft x 3 ft
15 W8 x 20 6 ¾ ft x 3 ft
90 mph 10 W8 x 17 6 ¼ ft x 3 ft
15 W8 x 24 7 ft x 3 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.