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A
qualified person should only undertake the installation of a Chiltern
Invadex Ceiling Mounted Hoist.
When
fixing a Ceiling Mounted Hoist to the ceiling always ensure that
the ceiling joists are of adequate strength to support the weight
of patient and equipment. If unsure, a qualified structural engineer's
report should be obtained.
If
a hoist is to be fitted to pre-formed roof trusses, it is advisable
to use strengthening unistrut to spread the load across several
trusses. This eliminates the need to drill trusses, which may weaken
them.
The
required size of studding bolt, fixed between tracking and strengthening
timber is 12mm. Where the tracking runs parallel with the roof trusses,
it is advisable to use packing pieces between ceiling board and
strengthening timber. This will help prevent the ceiling from cracking.
Fixing
to existing ground floor ceiling joists screws (50mm x 100mm min)
should be made via coach screws (10mm x 85mm). Joist centres must
be found by pressing to find the edges of joists to establish the
width and centre of the joist and a pilot hole must be drilled into
the joist before screwing in coach bolt.
Wall
brackets are available which should be fixed with M10 rawl expanding
bolts, or chemical fixing.
Where
a hoist installation requires 4.0 metres of track and over, the
power supply cables are impractical, so batteries are used to provide
adequate power and mains power-cut back-up.
Mains
electrical supply to the hoist is stepped down to 24 v D.C by a
400 VA transformer, which incorporates an overload thermal cut-out.
This must be installed according to IEE regulations
Mains
supply to a transformer should be through a mains switched spur
(rated at 5 amps).
Factors
to consider when choosing a Track Hoist (pdf) 
Suggested Installations
of Track Through Doorways 2 (pdf)
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