15
B. SELF-RETRACTING DEVICES (SRDs):
Any SRDs used with the HLL System must be approved for use with deformable
anchorage systems.
Retracted Length:
SRDs should have a retracted length of 2 ft. (0.61 m) or less. For SRDs with a retracted length
longer than 2 ft. (0.61 m), the difference in retracted length of the SRD must be subtracted from the HLL System Height
(A) when selecting the proper height range (D,E,F, or G) to use when determining Required Fall Clearance. See Figure 8.
Example:
For an SRD with a retracted length of 5 ft. (1.5 m) and HLL System height of 6 ft. (1.8 m):
1.
5 ft. (1.5 m) - 2 ft. (0.61 m) = 3 ft. (0.91 m) for the SRD length difference
2.
6 ft. (1.8 m) HLL System height - 3 ft. (0.91 m) = 3 ft. (0.91 m)
3.
Use Figure 8 chart columns with height range “F” (3 ft. ≤ A < 5 ft.)
For Self-Retracting Devices (SRDs), Required Fall Clearance is measured from the walking/working surface and is
determined by HLL System Height (A), HLL System Span (B), and the number of users connected to the HLL System.
See Figure 8 for reference.
To determine Required Fall Clearance (C) using Figure 8 for Self-Retracting Devices:
1.
Select the chart that has a capacity fitting your combined weight (including clothing, tools, etc.) and number of
users.
2.
Find the column in the chart that matches your System Height (A). The height ranges in these columns are
labeled D, E, F, and G, and are illustrated in the images below the chart.
3.
Find the row in the column to the far left that matches your System Span (B).
4.
Find the corresponding Required Fall Clearance (C) where the column for your System Height (A) and the row for
your System Span (B) intersect.
3.5
FALL CLEARANCE APPLICATION TYPE B - LARGE SYSTEM SETBACK:
An HLL System installed with a setback distance
from the edge greater than its height above the working platform creates a high angle between the connecting subsystem
and the direction of fall. In such cases, a fall causes the connecting subsystem to contact the edge before significant
deflection of the HLL. This limits the impact of HLL installation height in controlling free fall distance, as well as its effect on
Fall Clearance.
See Figure 9 for reference. If the Setback Distance (X) of the system is greater than its System Height (Y), then the
following guidelines should be observed:
A. ENERGY-ABSORBING LANYARDS:
•
Lanyard Length (L) must not exceed Setback Distance (X) during use. When possible, design your Fall Protection
system for Fall Restraint instead of Fall Arrest.
• Reduce the system capacity to one user per span.
• Figure 9 must be used for determining Required Fall Clearance below the working surface. Use the Figure 9 charts
instead of Figure 7.
To determine Required Fall Clearance (C) using Figure 9 for Energy-Absorbing Lanyards:
1.
Select the chart that has a capacity fitting your combined weight (including clothing, tools, etc.) within the
box with the lanyard shown.
2.
Find the row in the column on the left that matches your HLL Span Length (B).
3.
Find the corresponding Required Fall Clearance (C) in the column to the right.
B.
SELF-RETRACTING DEVICES (SRDS):
• SRDs used in a Large System Setback application must be rated for knee-level tie-off applications, in addition to
meeting the requirements specified in Table 1.
• Reduce the system capacity to one user per span.
• All Section 3.7 “Knee-Level Tie-Off and Leading Edge” criteria for SRDs must be observed.
•
For systems less than 2 ft. (0.6 m) from the edge, refer to Figure 8 for Required Fall Clearance. For systems
greater than 2 ft. (0.6 m) from the edge, which meet the X>Y criteria, refer to Figure 9 for Required Fall Clearance.
To determine Required Fall Clearance (C) using Figure 9 for SRDs:
1.
Select the chart that has a capacity fitting your combined weight (including clothing, tools, etc.) within the
box with the SRD shown.
2.
Find the row in the column on the left that matches your HLL Span Length (B).
3.
Find the corresponding Required Fall Clearance (C) in the column to the right.
Retracted Length
Summary of Contents for DBI SALA EZ-Line
Page 2: ...2 2 D B C E A G F D 3 1 W 2 FC 4 5 A B C D E F G A B C...
Page 3: ...3 6 X Y...
Page 7: ...7 10 1 2 11 A B B A...
Page 8: ...8 12 A A 13 1 A B 2 3 2 1 3 4...
