Ceiling Height Requirements
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5 Ceiling Height Requirements
The assembly of the magnet system, the magnet energization, and refills with liquid helium
require minimum height clearances.
• The ceiling height requirements for the magnet installation and cryogen refills do not need
to be met over the entire laboratory. The height requirements need only be met immedi-
ately above the magnet, over an area to allow for assembly of the lifting system (if appli-
cable), and over an area to allow for insertion of the helium transfer line.
• If a soffit is to be used, it is important to consider the area of raised ceiling needed to set-
up the lifting system being used to lift the magnet during the assembly phase of the instal-
lation. If a transverse I-beam is used in conjunction with the lifting system, this must fit
within the confines of the soffit.
• In lieu of a lifting system, a fixed lifting hook capable of supporting the magnet at a suffi-
cient height can be used to assemble the magnet. However, this option is usually not
ideal. See notes below.
WARNING
Fixed Hook
Danger to personnel and equipment due to falling lifting system when using a fixed hook.
Removing the heavy hoist directly over the magnet can be very difficult and dangerous for
both personnel and the magnet.
u It is important to consider how the hoist system and harness will be removed from a
fixed lifting hook after the magnet is installed.
u Ensure that the hook is certified to hold the weight of the equipment before use.
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