Final Vertical HLL Sag for Fall Clearance Calculation When Using SRD(s)
One Worker
Two Workers
Three or Four
Workers
0 - 30
3.5’
7.0’
11.0’
31 - 40
4.5’
8.5’
12.0’
41 - 50
5.5’
10.0’
13.5’
51 - 60
7.0’
12.0’
15.0’
61 - 70
8.0’
13.5’
17.0’
71 - 80
9.5’
15.0’
20.0’
81 - 90
11.0’
17.0’
22.5’
91 - 100
12.0’
18.5’
25.5’
Span Leng
th (f
ee
t)
Required Clearance When Connected to HLL Using
ANSI Z359.14 Class A SRDs Below Walking/Working Surface
One Worker Two Workers
Four
Workers
Span Leng
th (f
ee
t)
0 - 30
9.5’
14.0’
17.0’
31 - 40
10.5’
14.5’
18.0’
41 - 50
11.5’
16.0’
19.5’
51 - 60
13.0
’
18.0’
21.0’
61 - 70
14.0’
19.5’
23.0’
71 - 80
15.5’
21.0’
24.0’
81 - 90
17.0’
23.0’
28.5’
91 - 100
18.0’
24.5’
31.5’
For worst case clearance calculations the user of the FallTech 4-Person HLL systems may opt to use the ANSI Z359.14 maximum
deceleration distances when determining clearance requirements. ANSI Z359.14 allows up to 24” of deceleration for Class A SRDs and up
to 54” of deceleration for Class B SRDs. The charts below demonstrate clearance requirements below the working surface when using
the FallTech 4-Man Temporary HLL and attaching either Class A or Class B SRDs to the HLL. Overhead anchorage only.
2.8
Rescue:
The FallTech 4-Person Temporary HLL is part of a complete PFAS. It is not intended as a rescue device. Use of this system presents
a wide variety of potential rescue scenarios. Users of this system should understand their work environment and develop a rescue plan
accordingly. It is recommended that a trained on-site rescue team be present during use of the system.
3.0 System Requirements
3.1
Anchorage Strength:
End anchors selected for use with this system must have a minimum rating of 5,000 lbs. (22.2 kN) for one- and two-
worker applications and 6,000 lbs (26.7 kN) for three- and four-worker applications.
3.2
Structure:
The mounting points for the anchorage must be capable of supporting no less than
5,000 lbs. (22.2 kN) for one- and two-
worker applications and 6,000 lbs (26.7 kN) for three- and four-worker applications, see Figure 8.
3.2
Compatibility of Connectors:
Connectors are considered to be compatible with connecting elements when they have been designed to
work together in such a way that their sizes and shapes do not cause their gate mechanisms to inadvertently open regardless of how
they become oriented. Contact FallTech if you have any questions about compatibility. Connectors must be compatible
with the anchorage or other system components. Do not use equipment that is not compatible. Non-compatible connectors
may unintentionally disengage. Connectors must be compatible in size, shape, and strength. Self-closing, self-locking snap hooks
and carabiners are specified by OSHA and ANSI Z359.12.
MHLL05 Rev A
012920
9
Required Clearance When Connected to HLL Using
ANSI Z359.14 Class B SRDs Below Walking/Working Surface
One Worker Two Workers
Four
Workers
Span Leng
th (f
ee
t)
0 - 30
12.0’
14.0’
19.5’
31 - 40
13.0’
14.5’
20.5’
41 - 50
14.0’
19.5’
22.0’
51 - 60
15.5
’
20.5’
23.5’
61 - 70
16.5’
22.0’
25.5’
71 - 80
18.0’
23.5’
28.5’
81 - 90
19.5’
25.5’
31.0’
91 - 100
20.5’
27.0’
34.0’
