Limitations – Qualcraft SkyMast Skyhook User Manual
Page 8
FALL CLEARANCE CALCULATION
Lanyard length
(6’ total)
Safety factor
(3’ total)
Deceleration
distance (4’ total)
Height of harness
dorsal D-ring from
worker’s feet
(6’ total)
Required
distance
from
anchorage
(19’ total)
Limitations
Compatibility: When making connections with SkyMast Skyhooks, eliminate all possibility of roll-out.
Roll-out occurs when interference between a hook and the attachment point causes the hook gate to
unintentionally open and release. All connections must be selected and deemed compatible with
SkyMast Skyhooks by a Competent Person. All connector gates must be self-closing and self-locking,
and withstand minimum loads of 3,600 lbs. See the following for examples of
compatible/incompatible connections:
Fall Clearance: There must be sufficient clearance
below the anchorage connector to arrest a fall before
the user strikes the ground or an obstruction. When
calculating fall clearance, account for a MINIMUM
3’ safety factor, deceleration distance, user height,
length of lanyard/SRL, and all other applicable
factors.
Diagram shown is an example fall
clearance calculation ONLY.
Connector
closed and
locked to
D-ring.
OK.
Two or more
snap hooks or
carabiners
connected to
each other.
NO.
Two connectors
to same
D-ring.
NO.
Connector
directly to
horizontal
lifeline.
NO.
Connector
to integral
lanyard.
NO.
Connector directly
to webbing.
NO.
Application that
places load
on gate.
NO.
Incompatible
or irregular
application,
which may
increase risk
of roll-out.
NO.
Swing Falls: Prior to installation or use, make
considerations for eliminating or minimizing all
swing fall hazards. Swing falls occur when the anchor
is not directly above the location where a fall occurs.
Always work as close to in line with the anchor point as
possible. Swing falls significantly increase the likelihood
of serious injury or death in the event of a fall.
G
ua
rd
ia
n
Fa
ll
Pr
ot
ec
ti
on
6
30
5
S.
2
31
st
S
t.
, K
en
t,
W
A
9
80
32
p
ho
ne
: (
80
0)
4
66
-6
38
5
f
ax
: (
80
0)
6
70
-7
89
2
w
w
w
.g
ua
rd
ia
nf
al
l.c
om
6