Falltech DuraTech Class 2 Leading Edge SRL Operator's manual

DuraTech Class 2 Leading Edge SRL
User Instrucon Manual
MSRD28 Rev B 081723 FallTech 1306 S. Alameda Street Compton, CA 90221, USA Tel: [phone] Fax: [phone]
This manual is intended to meet the Manufacturer’s Instrucons as required by the American Naonal Standards
Instute (ANSI) Z359 and should be used as part of an employee training program as required by the Occupaonal
Safety and Health Administraon (OSHA).

Table of Contents
1.0 Warnings and Important Informaon ..................................................................................
2.0 Descripon ..........................................................................................................................
3.0 Applicaon ...........................................................................................................................
4.0 System Requirements ..........................................................................................................
5.0 Installaon and Use .............................................................................................................
6.0 Maintenance, Service and Storage ......................................................................................
7.0 Inspecon ............................................................................................................................
8.0 Labels ...................................................................................................................................
9.0 Denions ...........................................................................................................................
Appendix A .........................................................................................................................
3
4
6
6
8
13
14
16
17
19
For purposes of this manual, the DuraTech Class 2 Leading Edge SRL in all iteraons may be referred to collecvely as the DuraTech Class 2 LE, the
Class 2 LE SRL, the leading edge SRL, the DuraTech LE, the self-retracng device (SRD), the equipment, the device, the product, or the unit.
Throughout this manual, ANSI Z359.0-2012 fall protecon words, phases and terms are used. These terms are all formally dened in Secon 9 of
this manual.
MSRD28 Rev B 081723 2

1.0 Warnings and Important Informaon
This product is part of a personal fall arrest, restraint, work posioning, suspension, or rescue system. A Personal Fall Arrest System (PFAS) is
typically composed of an anchorage and a Full Body Harness (FBH), with a connecng device, i.e., a Energy Absorbing Lanyard (EAL), or a
Self-Retracng Device (SRD), aached to the dorsal D-ring of the FBH.
These instrucons must be provided to the worker using this equipment. The worker must read and understand the manufacturer’s instrucons for
each component or part of the complete system. Manufacturer’s instrucons must be followed for proper use, care, and maintenance of this
product. These instrucons must be retained and be kept available for the worker’s reference at all mes. Alteraons or misuse of this product, or
failure to follow instrucons, may result in serious injury or death.
A Fall Protecon Plan must be on le and available for review by all workers. It is the responsibility of the worker and the purchaser of this
equipment to assure that users of this equipment are properly trained in its use, maintenance, and storage. Training must be repeated at regular
intervals. Training must not subject the trainee to fall hazards.
Consult a doctor if there is reason to doubt your tness to safely absorb the shock of a fall event. Age and tness seriously aect a worker’s ability
to withstand falls. Pregnant women or minors must not use this equipment.
ANSI limits the weight of fall protecon equipment users to a maximum of 310 lbs. Products in this manual may have a rated capacity exceeding
ANSI capacity limits. Heavy users experience more risk of serious injury or death due to falls because of increased fall arrest forces placed on the
user’s body. In addion, the onset of suspension trauma aer a fall even may be accelerated for heavy users.
The user of the equipment discussed in this manual must read and understand the enre manual before beginning work.
NOTE: For more informaon consult the ANSI Z359 body of standards.
• Avoid moving machinery, thermal, electrical and/or chemical hazards as contact may cause serious injury or death.
• Avoid swing falls.
• Follow the weight restricons and recommendaons in this manual.
• Remove from service any equipment subjected to fall arrest forces.
• Remove from service any equipment that fails inspecon.
• Do not alter or intenonally misuse this equipment.
• Consult FallTech when using this equipment in combinaon with components or subsystems other than those described in this manual.
• Do not connect rebar hooks, large carabiners, or large snap hooks to the FBH dorsal D-rings as this may cause a roll-out condion and/or
unintenonal disengagement.
• Avoid sharp and/or abrasive surfaces and edges.
• Use cauon when performing arc welding. Arc ash from arc welding operaons, including accidental arcs from electrical equipment, can
damage equipment and are potenally fatal.
• Examine the work area. Be aware of the surroundings and workplace hazards that may impact safety, security, and the funconing of fall arrest
systems and components.
• Hazards may include but not be limited to cable or debris tripping hazards, equipment failures, personnel mistakes, moving equipment such as
carts, barrows, fork lis, cranes, or dollies. Do not allow materials, tools or equipment in transit to contact any part of the fall arrest system.
• Do not work under suspended loads.
WARNING
IMPORTANT
MSRD28 Rev B 081723 3

2.0 Descripon
The FallTech® DuraTech® Leading Edge is a self-retracng device for those working at height and when may be subject to Leading Edge fall hazards,
see Figure 10 for typical extreme sharp edges.
This manual contains one Appendix that contains gures and tables specic to the DuraTech LE SRL discussed in this manual.
The SRD discussed in this manual may be aached to an overhead anchorage, i.e., from directly over the user’s head, to as low as the level of the
user’s FBH dorsal D-ring. The SRD may also be aached to a non-overhead anchorage, i.e., level with the user’s FBH dorsal D-ring, down to
foot level, to a maximum of 5’ below the user’s FBH dorsal D-ring.
Leading edge means the unprotected side and edge of a oor, roof, or form work for a oor or other walking/working surface (such as deck) which
changes locaon as addional oor, roof, decking or form work secons are placed, formed or constructed. The shape and texture of a leading edge
may vary, see Figure 11.
As shown in Figure 1 below, the SRD has a glass reinforced nylon housing with an integrated handle that contains a lifeline composed of 7/32”
(5.6mm) diameter galvanized steel wire rope, wound onto a spring tensioned drum. The SRD’s lifeline is equipped with a cable stop/handle
assembly with a bumper, integrated tearaway Energy Absorber (EA), and a steel swivel snaphook. When the user is aached, the lifeline extends
and retracts with user movement, automacally maintaining a taut lifeline. If a fall occurs, a centrifugal pawl system engages, stopping the lifeline
payout. The tearaway EA deploys, gradually slowing and arresng the fall.
See Table 1A in Appendix A for product and materials specicaons.
MSRD28 Rev B 081723 4
1
2
34
5
6
7
8
Figure 1 - About FallTech® DuraTech Leading Edge SRL
1Self-Locking Housing End Carabiner
2Carrying Handle
3Cable Lifeline
4Spring Bumper
5Cable Stop/Handle Assembly
6Swaged Eye
7Energy Absorber
8Steel, Load-Indicang Swivel Snaphook

2.1 American Naonal Standards Instute (ANSI) and Occupaonal Safety and Health Administraon (OSHA): The SRD discussed in this
manual meets the standards of ANSI Z359.14-2021, ANSI A10.32-2012, and Occupaonal Safety and Health Administraon (OSHA)
regulaons 1926.502 and 1910.140. ANSI requires SRDs be classied according to the type of usage the user would be exposed to, and are
tested either as Class 1 or Class 2. Dynamic performance means that the SRD is installed in a tesng drop tower. A test weight is aached
to the SRD and then dropped. Test results are recorded.
Parameters recorded are:
The Arrest Distance is the total vercal distance required to arrest a fall. The Arrest Distance includes the deceleraon distance and the
acvaon distance. The Average Arrest Force is the average of the forces applied to the body and the anchorage by the fall protecon
system. The Maximum Arrest Force is the maximum amount of force that may be applied to the body and the anchorage by the fall
protecon system. In addion to the above tests conducted in ambient condions, the units must be retested for average and peak forces
under certain environmental condions, where the units are cooled, then tested, heated, then tested, or saturated in water and tested
again. Separate units may be used for each test. All test results are recorded.
This test data is then used to establish the basis for fall clearance guidelines published in the user instrucon manual.
Class 1 and 2: Class 1 devices shall be used only on overhead anchorages and shall be subjected to a maximum free fall of 2 feet
(0.6 m) or less. Class 2 devices are intended for applicaons where an overhead anchorage may not be available or feasible and be
subjected to a free fall of no more than 6 feet (1.8 m) over an edge.
To be declared a Class 1 and Class 2 device, ANSI requires an SRD to have an overhead Arrest Distance of less than 42” (1.1 m), an Average
Arrest Force of less than 1,350 lbs (6 kN) [1,575 lbs (7 kN) condioned] and a Maximum Arresng Force of 1,800 lbs (8 kN), for both
ambient and condioned tesng.
When dynamically tested in accordance with requirements of ANSI Z359.14-2021, FallTech Class 1 and Class 2 Self-Retracng Devices have
an AAF of 1,350 lbs (6 KN) or less and an AD of less than 42” (1.1 m).
Please see Secon 5 of this user instrucon manual for how to calculate your Minimum Required Fall Clearance (MRFC).
Class 2 SRLs shall include labels illustrang a fall clearance table and a diagram of the axes shown on the table. These labels shall be
axed to the product. The DuraTech Leading Edge includes these labels in the Energy Absorber.
Please see Secon 5.2 of this user instrucon manual for how to calculate your Minimum Required Fall Clearance (MRFC) using the
axed labels.
Classicaon informaon found on product labels is based on test results. Table 1B provides test performance results for the SRD
discussed in this manual. NOTE: Arrest distance is one of several parts of the Minimum Required Fall Clearance (MRFC). MRFC is discussed
in detail in Secon 5 .
OSHA requires an SRD limit the free fall to 2 feet (0.9 m) or less. If the maximum free fall distance must be exceeded, the employer must
document, based on test data, that the maximum arresng force will not be exceeded, and the personal fall arrest system will funcon
properly. The SRD discussed in this manual was successfully tested for horizontal use and falls over a steel edge without burrs, as found
on steel shapes and metal sheeng, and may be used in situaons where a fall may occur over similar edges, such as found on steel
shapes or metal sheeng.
• Arrest Distance (AD)
• Average Arrest Force (AAF)
• Maximum Arrest Force (MAF)
MSRD28 Rev B 081723 5

3.0 Applicaon
3.1 Purpose: The FallTech DuraTech Leading Edge SRL is designed to be used as a component in a Personal Fall Arrest System (PFAS), to
provide a combinaon of worker mobility and fall protecon as required for inspecon work, general construcon, maintenance work, oil
producon, conned space work, etc. The Class 2 SRL is intended for fall protecon in Leading Edge applicaons where falls may occur
over edges.
3.2 Personal Fall Arrest System: A PFAS is an assembly of components and
subsystems used to arrest a person during a fall event. A PFAS typically
consists of an anchorage, a deceleraon device such as a Energy Absorbing
Lanyard (EAL), a Self-Retracng Device (SRD), or a Fall Arrestor Connecng
Subsystem (FACSS), and a properly ed Full Body Harness (FBH). Maximum
permissible free fall in a typical PFAS is 6’ (1.8 m). The SRD discussed in this
manual may be used in non-overhead anchorage situaons. Clearance
calculators provided in this manual oer methods for calculang MRFC for
non-overhead anchorage locaons when the SRD is set back from 0’ to
4’ (1.2 m) and non-overhead anchorage locaons that are set back 5’ (1.5m) or
greater, see Figure 2.
4
3
2
1
Figure 2 - Anchorage Locaons
1Anchorage of SRD at Foot Level with 0’ Setback from Leading Edge
2Anchorage of SRD at Foot Level with 5’ Setback from Leading Edge
3Overhead Anchorage of SRD Above Dorsal D-Ring
4Anchorage of SRD Above Dorsal D-Ring with 5’ Setback from Leading Edge
4.0 System Requirements
4.1 Capacity: The SRD is designed for use by a single user with a combined weight of user, tools, clothing, etc., of 130–310 lbs (59-141 kg).
4.2 Compability of Connectors: Connectors are considered to be compable with connecng 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 quesons about compability. Connectors must be compable with the
anchorage or other system components. Do not use equipment that is not compable. Non-compable connectors may unintenonally
disengage. Connectors must be compable in size, shape, and strength. Self-closing, self-locking connectors are required by ANSI and
OSHA.
4.3 Compability of Components: Equipment is designed for use with approved components and subsystems only. Substuons or
replacements made with non-approved components or subsystems may jeopardize compability of equipment and may aect the safety
and reliability of the complete system.
4.4 Making Connecons: Only use self-locking connectors with this equipment. Only use connectors that are suitable to each applicaon.
Ensure all connecons are compable in size, shape, and strength. Do not use equipment that is not compable, see Figure 3.
Visually ensure all connectors are fully closed and locked. Connectors are designed to be used only as specied in each product’s user’s
instrucons.
3.3 Horizontal Lifeline (HLL) and Rail Systems: The SRD may be aached to rigid and exible anchors provided that all HLL or rail system
applicaons, installaon, and uses are under the supervision of a Qualied Person.
3.4 Rescue: Ensure a wrien rescue plan, method and system is in place and readily available for rapid response. Rescues may require
specialized equipment or measures. Rescue operaons are beyond the scope of this manual. See ANSI Z359.4 and Z359.2.
3.5 Applicaon Limits: The SRD discussed in this manual is designed for Leading Edge applicaons. However, take cauon to avoid very sharp
edges such as sheared metals, metals cut with an abrasive disk, or ame-cut metals. Also take cauon around very abrasive surfaces and
edges, such as concrete or stone, as these edges and surfaces may abrade the lifeline or the energy absorber during a fall event.
MSRD28 Rev B 081723 6

MSRD28 Rev B 081723 7
7227CLE (20’)
7229CLE (25’)
7232CLE (30’)
Longest Arrest Distance 134” (3.4 m) 96” (2.4 m)
Largest Average Arrest Force 1,003 lbs (4.5 kN) 919 lbs (4.1 kN)
Largest Maximum Arrest Force 1,649 lbs (7.3 kN) 1,427 lbs (6.3 kN)
5’ (1.5 m) Setback 0’ Setback
4.5 Personal Fall Arrest System: A PFAS is an assembly of components and subsystems used to arrest a person during a fall event. A PFAS
is typically composed of an anchorage and a FBH, with an energy absorbing connecng device, i.e., an SAL, an SRD, or a Fall Arrester
Connecng Subsystem (FACSS), connected to the dorsal D-ring of the FBH. PFAS components used in conjuncon with this SRD should
comply with ANSI Z359 and applicable OSHA regulaons.
4.6 Average Arrest Force and Arrest Distance: Table 1B provides test data on typical performance aributes of the three principal
parameters, Arrest Distance, Average Arrest Force and Maximum Arrest Force, listed by model number and class. Tesng is conducted
under various environmental condions; at ambient temperature, plus hot, cold, and in wet condions. In manufacturer’s tests, worst
case performance aributes of the SRD, connected at foot-level (maximum of 5 feet below the dorsal D-ring) in a Leading Edge applicaon
with 5’ (1.5m) of setback, or with 0’ setback, are:
ANever connect two acve components (snap hooks or carabiners) to each other.
BNever connect two acve components (snap hooks or carabiners) to a single D-ring at the same me.
CNever connect in a way that would produce a condion of loading on the gate.
DNever aach to a object in a manner whereby the gate (of the snap hook or carabiner) would be
prevented from fully closing and locking. Always guard against false connecons by visually inspecng for closure and lock.
ENever aach explicitly to a constuent subcomponent (webbing, cable or rope) unless specically provided for by the manufacturer’s instrucons for both
subcomponents (snap hook or carabiner and webbing, cable or rope).
FNever aach in a manner where an element of the connector (gate or release lever) may become caught on the anchor thereby producing addional risk of
false engagement.
GNever aach a spreader snap hook to two side/posioning D-rings in a manner whereby the D-rings will engage the gates; the gates on a spreader must
always be facing away from the D-rings during work posioning.
Figure 3 - Non-Compable Connecons
7268CLE (50’)
7265CLE (60’)
Longest Arrest Distance 127” (3.2 m) 125” (3.2 m)
Largest Average Arrest Force 1,004 lbs (4.5 kN) 944 lbs (4.1 kN)
Largest Maximum Arrest Force 1,608 lbs (7.2 kN) 1,792 lbs (8.0 kN)
The Competent Person may nd this data useful with planning anchorage locaon and calculang fall arrest loads and distances from the
walking/working level to the nearest obstrucon or lower level. See Secon 5.
NOTE: Arrest distance is one part of the Minimum Required Fall Clearance (MRFC). The MRFC is determined by consideraon of mulple
factors in fall protecon. Aachment below the level of the FBH D-ring will require addional fall clearance. MRFC is discussed in
detail in Secon 5.
5’ (1.5 m) Setback 0’ Setback

5.0 Installaon and Use
WARNING
Do not alter or intenonally misuse this equipment. Consult FallTech when using this equipment in combinaon with components or
subsystems other than those described in this manual. All components or subsystems used with the SRD discussed in this manual must be in
compliance with ANSI Z359 and/or OSHA.
Do not use rebar hooks, large carabiners or large snap hooks to connect to the FBH dorsal D-rings or to any small diameter non-compable
anchor point as this may cause a roll-out condion and/or unintenonal disengagement.
Do not insert extra connectors between the SRD lifeline connector and the FBH dorsal D-ring, except an approved D-ring extender.
Use cauon. Take acon to avoid sharp and/or abrasive surfaces and edges when possible.
5.1 Install the SRD: Examine the work area for possible hazards. Take cauon to avoid overhead hazards such as cranes, poles, overhead
power cables, and walking/working surface hazards such as power cables, welding leads, air and uid hoses, including obstrucon hazards
such as vercal columns and stacks of materials on the lower level. Eliminate hazards where possible.
Ensure the anchorage provides the Minimum Required Fall Clearance (MRFC) in the fall path below the walking/working surface to
prevent striking the lower level or an obstrucon during a fall event. Take acon to avoid swing falls, which occur when the anchorage is
not directly above the point where the fall occurs.
Fall clearance and swing falls are subject to variable condions. Anchor height, lateral movement, and setback distance all aect anchor
locaon with regard to fall clearance and swing fall.
The SRD may be aached to an overhead anchor, i.e. above the user’s FBH dorsal D-ring, or a non-overhead anchor, i.e., below the user’s
FBH dorsal D-ring. A non-overhead anchor may be as low as foot level, but no more than a maximum of 5’ (1.5m) below the user’s FBH
dorsal D-ring. Non-overhead anchor locaons result in greater contact between the lifeline and the edge and present greater abrasion
risk hazards.
Use of a foot level anchorage should be as a last resort, when no other anchor opon exists.
Performance tesng has shown that a fall event over a leading edge will alter SRD performance characteriscs and fall clearance
requirements. When anchored below the FBH back D-ring fall events will result in greater fall clearances. Reduced setback distances will
also increase clearance requirements. Non-overhead anchorage when the SRD is set back less than 5’ (1.5 m) will result in the greatest
MRFC and the least amount of worker mobility due to swing fall. Greater set back distances of 5’ (1.5 m) or more will reduce the overall
MRFC and allow for more lateral movement of the worker when aached to a non-overhead anchorage.
If job site geometry allows it, a setback distance of 5’ (1.5 m) is recommended to take full advantage of the SRD performance. In addion,
the Angle of Redirecon of the lifeline, i.e., the angle of the lifeline as it passes over the edge, must be at 90 degrees or more, never
less, see Secon 5.3.
Do not aach the SRD in a manner that places the edge higher than the SRD.
MSRD28 Rev B 081723 8
4.7 PFAS Anchorage Strength: An anchorage selected for PFAS must have a strength able to sustain a stac load applied in the direcon
permied by the PFAS of at least:
a) Two mes the maximum arrest force permied when cercaon exists, or
b) 5,000 lbs. (22.2 kN) in the absence of cercaon.
Select an anchorage locaon carefully. Consider structural strength, obstrucons in the fall path, and swing fall hazards. In certain
situaons, the qualied person can determine that a given structure is able to withstand the applied MAF of the PFAS with a safety factor
of at least two, as required by OSHA.

5.2 Calculang Minimum Required Fall Clearance
5.2.1 DuraTech LE (All Sizes) in Overhead, Non-Leading Edge Anchorage Applicaon
The DuraTech LE may be used may be used as a standard SRD in an overhead
condion, in which the SRD is installed anywhere in the allowable aachment
area, which ranges from directly above the user to level with the FBH D-ring, as
shown in Figure 4.
The overhead condion minimum required fall clearance (MRFC) is
calculated using four metrics, measured from the walking-working surface:
SRD Deceleraon Distance, D-Ring Shi and Harness Stretch [1  (0.3m)],
Safety Factor [1.5  (0.5m)], and Swing Fall. Chart 1 below is calculated using
the performance data of the SRD and includes all four metrics listed previously
to determine the MRFC.
X-Set -Back
Distance
Y-Lateral Oset Dist.
Z- Minimum Required
Fall Clearance From
Working Surface
20. 5
28.0
X-SRD Anchorage Height
Above Dorsal D-ring
Z- Minimum Required
Fall Clearance From
Working Surface
Y- Lateral
Oset Distance
Figure 4 - MRFC Overhead Anchorage
0 
(0 m)
2 
(0.7 m)
4 
(1.3 m)
6 
(1.9 m)
8 
(2.5 m)
10 
(3.1 m)
12 
(3.7 m)
14 
(4.3 m)
16 
(4.9 m)
18 
(5.5 m)
20 
(6.1 m)
22 
(6.8 m)
24 
(7.4 m)
60 
(18.3 m)
6.0
(1.9)
6.5
(1.9)
6.5
(1.9)
6.5
(1.9)
7.0
(2.1)
7.0
(2.1)
7.5
(2.3)
8.0
(2.5)
8.5
(2.6)
9.0
(2.7)
9.5
(2.9)
10.0
(3.1)
11.0
(3.3)
55 
(16.8 m)
6.0
(1.9)
6.5
(1.9)
6.5
(1.9)
6.5
(1.9)
7.0
(2.1)
7.0
(2.1)
7.5
(2.3)
8.0
(2.5)
8.5
(2.6)
9.0
(2.7)
10.0
(3.1)
10.5
(3.2)
11.5
(3.5)
50 
(15.3 m)
6.0
(1.9)
6.5
(1.9)
6.5
(1.9)
6.5
(2.0)
7.0
(2.1)
7.0
(2.2)
7.5
(2.3)
8.0
(2.5)
8.5
(2.6)
9.5
(2.8)
10.0
(3.1)
11.0
(3.3)
11.5
(3.5)
45 
(13.8 m)
6.0
(1.9)
6.5
(1.9)
6.5
(1.9)
6.5
(2.0)
7.0
(2.1)
7.5
(2.2)
8.0
(2.4)
8.5
(2.5)
9.0
(2.7)
9.5
(2.9)
10.5
(3.2)
11.5
(3.4)
12.0
(3.7)
40 
(12.2 m)
6.0
(1.9)
6.5
(1.9)
6.5
(1.9)
6.5
(2.0)
7.0
(2.1)
7.5
(2.3)
8.0
(2.4)
8.5
(2.6)
9.5
(2.8)
10.0
(3.1)
11.0
(3.3)
12.0
(3.6)
13.0
(3.9)
35 
(10.7 m)
6.0
(1.9)
6.5
(1.9)
6.5
(1.9)
7.0
(2.0)
7.0
(2.2)
7.5
(2.3)
8.0
(2.5)
9.0
(2.7)
9.5
(2.9)
10.5
(3.2)
11.5
(3.5)
12.5
(3.8)
13.5
(4.1)
30 
(9.2 m)
6.0
(1.9)
6.5
(1.9)
6.5
(2.0)
7.0
(2.1)
7.5
(2.2)
8.0
(2.4)
8.5
(2.6)
9.5
(2.8)
10.0
(3.1)
11.0
(3.4)
12.5
(3.7)
13.5
(4.1)
14.5
(4.4)
25 
(7.7 m)
6.0
(1.9)
6.5
(1.9)
6.5
(2.0)
7.0
(2.1)
7.5
(2.3)
8.0
(2.5)
9.0
(2.7)
10.0
(3.0)
11.0
(3.3)
12.0
(3.6)
13.5
(4.0)
14.5
(4.4)
16.0
(4.8)
20 
(6.1 m)
6.0
(1.9)
6.5
(1.9)
6.5
(2.0)
7.0
(2.1)
8.0
(2.3)
8.5
(2.6)
9.5
(2.9)
10.5
(3.2)
12.0
(3.6)
13.0
(4.0)
14.5
(4.4)
16.0
(4.8)
17.5
(5.3)
15 
(4.6 m)
6.0
(1.9)
6.5
(1.9)
7.0
(2.0)
7.5
(2.2)
8.0
(2.5)
9.5
(2.9)
10.5
(3.2)
12.0
(3.6)
13.0
(4.0)
14.5
(4.4)
16.0
(4.9)
18.0
(5.4)
19.5
(5.9)
10 
(3.1 m)
6.0
(1.9)
6.5
(1.9)
7.0
(2.1)
8.0
(2.4)
9.0
(2.7)
10.5
(3.1)
12.0
(3.6)
13.5
(4.1)
15.0
(4.6)
17.0
(5.1)
18.5
(5.6)
20.5
(6.2)
22.0
(6.8)
5 
(1.6 m)
6.0
(1.9)
6.5
(1.9)
7.5
(2.3)
9.0
(2.7)
10.5
(3.1)
12.5
(3.6)
14.0
(4.1)
16.0
(4.6)
18.0
(5.5)
20.0
(6.0)
22.0
(6.6)
24.0
(7.2)
26.0
(7.8)
0 
(0 m)
6.0
(1.9)
8.0
(2.5)
10.0
(3.1)
12.0
(3.7)
14.0
(4.3)
16.0
(4.9)
18.0
(5.5)
20.0
(6.1)
22.0
(6.8)
24.0
(7.4)
26.0
(8.0)
28.0
(8.6)
30.0
(9.2)
SRD Anchorage Height Above Dorsal D-Ring (X)
Lateral Oset Distance (Y)
Chart 1
Overhead
Using Chart 1 to Calculate Minimum Required Fall Clearance for the DuraTech LE
2 foot (0.6 m) increments along the Y-Axis represent the Lateral
Oset Distance the user is working away from being directly
under the SRD
5 foot (1.5 m) increments up the X-Axis represent the
SRD Anchorage Height above the user’s Dorsal D-Ring
Example:
If the user needs to work 10 feet (3.1 m) away from directly under the SRD, the SRD needs to be anchored at least 15 feet (4.6 m) above
the user’s Dorsal D-Ring. Minimum required fall clearance is 9.5 feet (2.9 m) at maximum allowable swing fall.
Example:
If the only suitable Anchorage for the SRD is at D-Ring height [0.0 feet (0.0 m)] above the user’s Dorsal D-Ring, the maximum allowable
work zone is 4 feet (1.3 m) away from the SRD. Minimum required fall clearance is 10.0 feet (3.1m) at maximum allowable swing fall.
Key to Work Zone Areas:
= Allowable Use Area = Not Allowed Use Area
WORKING IN THIS AREA MAY RESULT IN SERIOUS INJURY OR DEATH
MSRD28 Rev B 081723 9

5.2.2 7227CLE (20’), 7229CLE (25’), and 7232CLE (30’) DuraTech LE in a
Non-Overhead Anchorage Applicaon
The leading edge/below D-ring condion minimum required fall clearance
(MRFC) is calculated using ve metrics, measured from the walking-
working surface: SRD Deceleraon Distance, D-Ring Shi and Harness
Stretch [1  (0.3m)], Safety Factor [1.5  (0.5m)], Dorsal D-ring Height
[5  (1.5m)], and Swing Fall. Dorsal D-ring height is added to account
for the below D-ring e-o compared to the overhead condion. Chart
2 below is calculated using the performance data of the SRD and includes
all ve metrics listed previously to determine the MRFC.
X-Set -Back
Distance
Y-Lateral Oset Dist.
Z- Minimum Required
Fall Clearance From
Working Surface
Figure 4 - MRFC Non-Overhead Anchorage
0 
(0 m)
2 
(0.7 m)
4 
(1.3 m)
6 
(1.9 m)
8 
(2.5 m)
10 
(3.1 m)
12 
(3.7 m)
14 
(4.3 m)
16 
(4.9 m)
18 
(5.5 m)
20 
(6.1 m)
22 
(6.8 m)
0 
(0 m)
15.5
(4.7)
17.5
(5.3)
19.5
(6.0)
21.5
(6.6)
23.5
(7.2)
25.5
(7.8)
27.5
(8.4)
29.5
(9.0)
31.5
(9.6)
33.5
(10.2)
35.5
(10.8)
37.5
(11.4)
5 
(1.6 m)
15.5
(4.7)
16.0
(4.9)
17.0
(5.2)
18.5
(5.6)
20.0
(6.1)
22.0
(6.8)
23.5
(7.2)
25.5
(7.8)
27.5
(8.4)
29.5
(9.0)
31.5
(9.6)
33.5
(10.2)
10 
(3.1 m)
15.5
(4.7)
16.0
(4.9)
16.5
(5.0)
17.5
(5.3)
18.5
(5.6)
20.0
(6.1)
21.5
(6.6)
23.0
(6.9)
24.5
(7.5)
26.5
(8.1)
28.0
(8.5)
30.0
(9.1)
15 
(4.6 m)
15.5
(4.7)
16.0
(4.9)
16.5
(5.0)
17.0
(5.2)
17.5
(5.3)
19.0
(5.8)
20.0
(6.1)
21.5
(6.6)
22.5
(6.9)
24.0
(7.3)
25.5
(7.8)
27.5
(8.4)
20 
(6.1 m)
15.5
(4.7)
16.0
(4.9)
16.0
(4.9)
16.5
(5.0)
17.5
(5.3)
18.0
(5.5)
19.0
(5.8)
20.0
(6.1)
21.5
(6.6)
22.5
(6.9)
24.0
(7.3)
25.5
(7.8)
25 
(7.7 m)
15.5
(4.7)
16.0
(4.9)
16.0
(4.9)
16.5
(5.0)
17.0
(5.2)
17.5
(5.3)
18.5
(5.6)
19.5
(6.0)
20.5
(6.2)
21.5
(6.6)
23.0
(6.9)
24.0
(7.3)
30 
(9.2 m)
15.5
(4.7)
16.0
(4.9)
16.0
(4.9)
16.5
(5.0)
17.0
(5.2)
17.5
(5.3)
18.0
(5.5)
19.0
(5.8)
19.5
(6.0)
20.5
(6.2)
22.0
(6.8)
23.0
(6.9)
SRD Setback Distance from Edge (X)
Lateral Oset Distance (Y)
Chart 2
Non-Overhead
Using Chart 2 to Calculate Minimum Required Fall Clearance for the DuraTech LE
2 foot (0.6 m) increments along the Y-Axis represent the Lateral
Oset Distance the user is working away from being directly
under the SRD
5 foot (1.5 m) increments up the X-Axis represent the
SRD Setback Distance from Edge
Example:
If the user needs to work 10 feet (3.1 m) away from the SRD along the edge, the SRD needs to be anchored back at least 15 feet (4.6 m)
from the edge. Minimum required fall clearance is 19.0 feet (5.8 m) at maximum allowable swing fall.
Example:
If the only suitable Anchorage for the SRD is at the edge [0.0 feet (0.0 m)], the maximum allowable work zone is 4 feet (1.3 m) away
from the SRD. Minimum required fall clearance is 19.5 feet (6.0 m) at maximum allowable swing fall.
Key to Work Zone Areas:
= Allowable Use Area = Not Allowed Use Area
WORKING IN THIS AREA MAY RESULT IN SERIOUS INJURY OR DEATH
MSRD28 Rev B 081723 10