250
4
50
350
Insert M10x 200 Threaded
bar into pre drilled holes
in Frame of Babel Drum
using M10 BZP Nuts
Excavate a holes with a
250mm diameter tapering
down to 350mm diameter
and 450mm depth
Compact base of hole with
50mm of aggregate.
Lower ground Fix post
attached to instrument
into hole (check
instrument straight and
level before filling with
concrete)
Fill hole with fast drying
concrete to manufacturers
specifications.
400
50
If Drum needs to
be positioned
lower a deeper
hole can be
excavated.
Ground Fixed
Ground Fix Installation
(1.1)
1
2
3
4
Babel Drum
Page 3 of 3
M10x200 Threaded Bar
x3
M10 BZP Nut
x6
Components:
BS EN 1176
Foundations should not present a hazard. These foundations are recommended as a guide,
for more information on foundation details for various surface see Part 7 of BS EN 1176.
Metric Conversion:
50mm/ 2”
250mm/ 10”
350mm/ 14”
400mm/ 16”
450mm/ 18”
