Fixing U-Bar Supports - Huawei Airbridge cBTS3612 Installation Manual

Installation Manual
Airbridge cBTS3612 CDMA Base Station
(1) The expansion bolt M12
Figure 3-18 Installation hole positions of U-bar supports
III. Drilling
Use Ö14 or Ö16 drill bit to drill holes at the marked points on the floor.
Caution:
1. Generally, the selected drill bit is bigger than the expansion bolt. If the hole diameter is too small for
the F14 drill bit, enlarge the hole diameter by technical means.
2. Hold the drilling bit vertical to the floor during drilling. Hold tight the drillstock with two hands to keep it
in the right direction, as vibrations of the drill may damage the floor or produce a slanting hole.
3. The hole depth should be the length of the expansion bolt stem plus the drill bit. All holes should
share the same. Before measuring the hole depth, remove the dust inside the hole with a vacuum
cleaner, then drill again if necessary.
4. If the ground is too hard and smooth to settle the drill bit, punch out a pit with a chisel before drilling.
Marking and drilling hole are fundamental to the hardware installation. If the result is
not accurate, it will bring trouble for the future work. Thus the quality at the initial
stage is the prerequisite for the whole project.

3.4.4 Fixing U-bar Supports

I. Installing expansion bolts
1) Before the installation, remove the dust inside and outside the holes with a
vacuum cleaner, and then check the distance among holes. Whenever big errors
occur, the relevant hole must be located and drilled again.
2) Unfix the spring washer, nut and plain washer. Put the expansion bolt into the
hole and knock directly on the bolt with a hammer (such as nail hammer) until
(2) Cabinet appearance
3-21
Hardware Installation
3 Cabinet Installation
(3) Front face of the cabinet