2.0
Application
2.1
The PALMER SAFETY 4-Person Temporary HLL provides horizontal mobility for workers exposed to fall hazards and is designed as an
anchorage subsystem for the attachment of up to four
PFASs. The HLL is adjustable up to 100’ in length for a single span system and
is
designed to be used as part of a complete PFAS. See Figure 1.
Figure 1 - About the 4-Person Temporary HLL
When properly tensioned, the lifeline will react to a fall event of up to four workers by combining the energy absorbing properties of the
lifeline energy absorber, the lifeline, and the worker’s personal energy absorber. During a fall event, the stretch o
f the lifeline and the
expansion of the user’s PFAS will result in reduced forces to the anchor and to the user’s body.
2.2
Application Limits:
The PALMER SAFETY 4-Person Temporary HLL is a dynamic anchorage subsystem that will vary in its performance
depending upon the length of the system, the number of workers attached and the type of PFAS being used. Care should be taken to
understand the capacity of the system, minimum required fall clearance, anchorage strength requirements, total allowable free fall, total
allowable
fall clearance, and how the user’s PFAS will deploy during a fall event. Longer HLL spans will generate more lifeline deflect
ion and sag
during a fall event and will result in greater clearance requirements. See Figure 2.
It is important to use intermediate anchor points which would significantly help to reduce the fall clearance space and also reduce the
other risks could happen.
A
Deployed In-Line Energy Absorber
E
Height of Worker
B
Dynamic Lifeline Sag
F
Safety Factor
C
Deployed EAL
G
Total Required Fall Clearance
D
D-ring Shift and Harness Stretch
H
Total SRD Deceleration Distance from User’s Manual*
A
Connectors
B
4-Person HLL Rope
C
O-Rings x4
D
Tensioner
E
Energy Absorber
Figure 2 - Clearance Requirements
B
A
A
B
A
A
G
C
D
B
D
H
F
B
C
D
G
G
D
G
H
E
E
F
F
F
