This
inscription is written to be a general guidelines for site engineer to inspect
the foundation prior equipment erection/installation.
The
best way to solve a problem is by preventing it. Perhaps this will be a little
discomforting, considering that it is not at all a rotating engineer’s job to
inspect the result of bekisting/formwork prior the concrete pouring.
Rotating engineer VS Civil engineer
The
civil and rotating engineer have a very fundamental difference. Rotating
engineer usually talks in micrometers while the civil engineer talks in
centimeters.
In
some case, to avoid any dispute regarding the foundation, it is recommended for
the rotating engineer has more involvement in the foundation inspection
activity.
I
have experiences when the civil works is not satisfactory because the anchor
holes position is deviated too far, the level is not right and anchor box size
is not sufficient. This deviations were causing the corrective action to be
very time consuming and costly.
Hence,
to avoid the same mistake happening again, it is recommended that the rotating
engineer is more involved in the pre-pouring concrete inspection.
Pre-requisite Documents
The
pre-requisite documents used as reference on pre-pouring inspection are as
follows:
1. Plot
plan drawing
2. Foundation
drawing
3. Equipment
general arrangement drawing
4. Civil
foundation standard drawing
5. Inspection
Checklist
Important Aspects
The
aspect that needed to be focused on by rotating engineer on pre-pouring
inspection are as follows:
1. The
coordinate of the foundation centerline
2. The
size of the foundation (length, width, diagonal)
3. The elevation of the TOC (top of concrete)
4. The
size of the anchor box (length, width, depth)
5. The
relative position of the anchor bolt
6. The
elevation of the anchor bolt (if using embedded anchor)
The
deviation of the measurement shall not exceed 3 mm, while for anchor bolt
position the deviation for each anchor position shall not exceed 1.5 mm.
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