User's Guide ______________________________________________________________________
86 __________________________________________________________________ M210667EN-C
Foundation
The very first procedure is the preparation of the foundations. For more
detailed instructions, see the document LT31 Enhanced Weather
Protection Hoods Installation Guide in section Related Manuals on page
16.
This preparation work includes the construction of the needed concrete
foundations as well as the setting of the foundation screws for secure
fixing of the equipment.
Two concrete foundations are required. The recommended dimensions
for the foundations are illustrated in Figure 42 below. This size generates
sufficient space to place a ladder safely near the transmissometer
transmitter and receiver. The distance between foundation centers should
meet the desired baseline length plus 0.5 m for LT31 (typically 30 m +
0.5 m).
0401-054
Figure 42
Casting Concrete Foundation
If a new foundation needs to be cast, it is recommended that a duct for
power and signal cables is mounted into the cast. The tube with the
cables should come out from the casting near the bottom line of the
triangle formed by the foundation screws which will be positioned later.
The concrete foundation should be cast directly on site. An appropriate
reinforcement must be foreseen to stabilize the structure.