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F. Connectors should not be connected
to any object which does not allow the
connector gate to close or lock. Anchor
shapes that allow roll out to occur should
never be used for connection. If the anchor,
to which the snap hook or carabiner is
attached, is under sized or irregular in
shape, then this may allow for the gate of
the connector to come in contact with the
anchor, thereby causing the connector to
open up and possibly disengage from the
anchor. This is known as roll out of the
connector. See Diagram 2.
G. Do not use connectors on an anchorage object as shown in figure A to F.
Correct Anchorage Positioning:
This chart details allowable working zones required to reduce risk of swing falls and
improper side loading. ALWAYS adhere to information specified by chart.
This chart details allowable working zones required to reduce risk of swing falls and improper side loading. ALWAYS
adhere to information specified by chart.
Anchor Distance
From Leading
Edge (Y)
Working Distance
Along Roof Edge
(Either Direction) (X)
Working
Angle From
Perpendicular (Ø)
6’
8’
53°
10’
9’ - 9”
45°
15’
11’ - 7”
38°
20’
13’ - 3”
33°
25’
14’ - 6”
30°
30’
16’
28°
35’
17’ - 2”
26°
40’
18’ - 3”
24°
45’
19’ - 4”
23°
50’
19’ - 10”
21°
55’
21’ - 4”
21°
60’
22’ - 3”
21°
Ø
: Total Working Angle
X
: Working Distance
Along Leading Edge
Y
: Distance From
Leading Edge
X
Y
ø
X
Leading Edge
For example, if the anchorage connector is 6’ from the leading edge (Y), the working distance (X) is 8’ in each direction
from the perpendicular, which translates to a 53° working angle.
Swing Falls:
When using or installing any anchors, think about eliminating swing fall hazards. Swing falls happen when
the anchor point is not directly over the object being secured. Always make your anchors as close to perpendicular to
where you are securing something as possible. Swing falls can increase the chances of serious injury or death if there is a
fall.
As displayed in the following diagrams, there are danger zones when using a single HLL, and in order to be safe use
multiple HLLs.
2. The gate presses against
the connecting Ring.
Small ring or other non-compatibly shaped element
3. The gate opens allowing
the snap hook to slip off.
1. Force is applied to
the snap hook.
Diagram 2 - Unintentional Disengagement (roll-put)
