Daktronics CH-1318V - Manual (Page 8)

2-2 Installation
The footings recommendations are based on the allowable soil bearing pressure of 3000 psf
vertically and 300 psf/ft of depth horizontally. However, these recommendations are
suggestions only and soil bearing pressure at the site must be determined by a sample test
prior to specifying the actual footings. Be sure that the installation complies with local codes
and is suitable for particular soil and wind conditions. Daktronics assumes no responsibility
for displays installed by others. Daktronics
recommends that W-sections of grade 36 steel be
used for beams, and that 28-day (strength 3000 psi) concrete be used for footings.
A note about beam nomenclature: For a typical beam, W8x24 for example, “W” stands for
“Wide-Flange Beam”. The first number (8) is the approximate front to rear dimension of the
beam in inches. The second number (24) is the weight per foot in pounds. This numbering is
a standard in the steel industry. Widths are from 6.00 to 8.125 inches in the chart above.
Note: Recommendations for a single rectangular structural steel tube and footing to support
the display as shown in Drawing A-47512 must be determined by a qualified structural
engineer using data from a soil sample test at the site.
2.3 Display Mounting
Reference Drawings: Footing & Beam, CH-1318V ........................ Drawing A-47512
Display Mounting, CH-1318V...................... Drawing A-47517
Drawings A-47512 and A-47517 show the typical mounting for the display.
Note: The bolts that secure the display to the beam(s) do not go through the beam(s), but run
along both sides of the beam, clamping the display to the beam(s).
A mounting kit consisting of mounting angles and ½” hardware are provided to mount the
display.
1. Position the display against the mounting beam(s) as shown.
2. Secure the bottom of the display to the beam(s).
3. Secure the top of the display and then the middle of the display. Once mounting angles
are attached, the display may be slid up or down to the desired height.
4. Tighten all bolts once the display is positioned as desired.
2.4 Electrical Installation
2.4.1 Control Signal Cable
Reference Drawings: Pwr/Sig Entrance, 1 Driver Display... Drawing A-46755
Color Code, 25-Pin J-Box ................. Drawing A-47207
Component Locations, CH-1318V .... Drawing A-47520
For the display, two conductors of 24 AWG are needed. For distances up to 600 ft. or
22 AWG, up to 1000 ft. are required. Daktronics has 24 AWG direct burial cable,
Daktronics part no. W-1105 with 6 conductors, and 22 AWG cable that must be
pulled through the conduit before burial, Daktronics part no. W-1077 with 2
conductors.