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9.0 Preventing Suspension Trauma
OSHA states that potentially fatal suspension trauma can occur within minutes while waiting for
rescue after a fall, and the average fall rescue time is approximately 15 minutes. Suspension
trauma, also known as suspension intolerance or othostatic intolerance, is a serious condition
that can be controlled with good harness design, prompt rescue, and post fall suspension relief
devices, such as the Miller Relief Step
sion relief device allowing the user to remove the tension from around the legs, freeing blood
flow, which can delay the onset of suspension trauma. An attachment element extender is not
intended to be attached directly to an anchorage or anchorage connector for fall arrest. An en-
ergy absorber must be used to limit maximum arrest forces to 1800 lbs (8 kN). The length of the
attachment element extender may affect free fall distances and free fall clearance calculations.
9.1 Using the Miller Relief Step Safety Device
The Miller Relief Step
enhances blood circulation by permitting the worker to be able to move and flex
leg muscles until rescue. Small and lightweight, the Relief Step Safety Device
attaches to any brand full-body harness.
1
Mount to upper rear web strap by "choking"
through loop. (Be sure loop is past metal
adjustments.)
Unsnap and release elastic "pull
tab" loop from underneath leg strap.
Then pull elastic strap to deploy
webbing fully from plastic sleeve.
Us er Ins truc tion s - En gli s h
Safety Device. A conscious user may deploy a suspen-
™
Safety Device provides a fallen worker with support and
™
Insert foot into
loop step and
adjust using
orange tabs.
2
Attach elastic
"pull tab" loop
around front leg
strap above buckle
and snap closed.
The Relief
Step provides
the ability to
stand allowing
improved
21
circulation.
Elastic
"Pull Tab"
Loop
Orange
Adjustment
Tabs
Metal
Adjustments
Choking
Loop
Two Relief
Steps provide
added support,
balance, and
comfort.
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