Honeywell MILLER AIRCORE Mode D'emploi page 8

through the unused leg if it is not able to release from the harness.
Elastic Keepers and Web Finials (see Fig. 15 in Appendix A)
All full-body harnesses shall include keepers or other components which serve to control loose ends of webbing straps. Miller
harnesses are equipped with elastic keepers to store the loose or excess webbing straps. Some harnesses are also equipped with
web finials on the ends of each webbing strap to further help secure webbing straps in place. Simply hook the clip of the web finial
to the underlying harness strap.
 CAUTION: Do not allow webbing straps to hang freely as loose ends of straps can get caught in machinery or cause
accidental disengagement of an adjuster.
D-Ring Extension (see Fig. 16 in Appendix A)
Some specialty harnesses may be equipped with a dorsal D-ring extension. This dorsal D-ring extension may be used as the fall
arrest attachment element in place of the dorsal D-ring. When not in use, the D-ring extension shall be stored securely in the elastic
keeper designated.
 CAUTION: Do not use dorsal D-ring and dorsal D-ring extension simultaneously for fall arrest; only one fall arrest
attachment element may be used at a given time.
Always account for the additional length of the D-ring extension when calculating fall clearance (refer to 6.0).
5 USING A BODY BELT
A body belt shall be used for positioning or travel restraint only. Body belts may be used in conjunction with a full-body harness;
however, the fall arrest attachment elements designated on the harness must be used for fall protection.
5.1 Use of Attachment Elements (D-Rings) [See Table 3]
6 CALCULATING FALL CLEARANCE DISTANCE
It is essential to understand how to calculate the fall clearance distance required for each work application to avoid contact with
a lower level.
The basic calculations shown in this section and the related diagrams in Appendix A may be used to determine Required Fall
Clearance when using a shock-absorbing lanyard or self-retracting lifeline in an overhead application. As many additional variables
or factors can affect fall clearance, it is imperative that the user also refer to the instructions provided with the connecting device
for more comprehensive information. For a more automated approach to calculating Required Fall Clearance, access the Miller Fall
Clearance Calculator online: www.millerfallprotection.com/fallclearance
Fall Clearance Calculation Guidelines:
• Full-body harness stretch is limited to 18 in. (457.2mm) or less. Full-body harness stretch, the amount the full-body harness
component of a personal fall arrest system will stretch and deform during a fall, can contribute to the overall elongation of the
system in stopping a fall. It is important to include the increase in fall distance created by full-body harness stretch, as well
as the full-body harness connector length, the settling of the user's body in the full-body harness, and all other contributing
factors when calculating total clearance required for a particular fall arrest system. Honeywell Safety Products recommends
and includes a 3 ft. (0.9m) safety/stretch factor in its calculations.
• When a D-ring extension is used, add the length of the extension to the fall clearance calculation.
• Shock absorbers will elongate when subjected to fall arrest forces. Refer to the labels provided with the connecting device to determine
the maximum elongation distance, and be sure to use the maximum elongation distance to calculate required fall clearance.
NOTE: The shock-absorbing lanyard calculation determines required fall clearance from the connection point of the
lanyard (to the anchorage connector or anchorage) to the next lower level or obstruction below the work surface. The
self-retracting lifeline calculation determines required fall clearance from the work level to the next lower level or
obstruction.
[Calculation taken from connection point of lanyard to anchorage connector or anchorage]
Length of Lanyard (LL)
+ Max. Elongation/Deceleration Distance (MED)
+ Height to Worker's Back D-Ring (H)
+ 3 ft. (0.9m) Safety/Stretch Factor (SF)
= Required Fall Clearance (RFC)
Maximum Arrest Distance (MAD)
+ [Non-Standing Work Position Factor (NSF)]*
+ [Swing Fall Factor (SFF)]*
+ 3 ft. (0.9m) Safety/Stretch Factor (SF)
= Required Fall Clearance (RFC)
*The self-retracting lifeline fall clearance calculation assumes the user is standing and performing work directly below the anchor
point; otherwise, additional fall clearance is required. Refer to I267--Miller Self-Retracting Lifelines User Instruction Manual for
more information regarding the non-standing work position factor and the swing fall factor.
 WARNING
Do not use a body belt for fall arrest.
SHOCK-ABSORBING LANYARD
FALL CLEARANCE CALCULATION (see Fig. 17a in Appendix A)
SELF-RETRACTING LIFELINE
FALL CLEARANCE CALCULATION
(see Fig. 17b in Appendix A)
[Calculation taken from work level]
Contact Honeywell Technical Service:
1-800-873-5242 (press 4)
Questions?
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