LGH User Guide 2018 UK 2nd Edition - Page 154



Pre Lift Guide
TECHNICAL INFO
AREA PREPARATION
•T
he location for landing the load has been selected
and prepared
• Blocking or cribbing is available to set the load on
• A travel path has been determined and cordoned off
•O
ther personnel in the area have been notified of the lift
CRANE CONSIDERATIONS (Mobile Cranes)
• Is the lift within the crane’s rated capacity
(boom height/radius)?
• Have boom deflections been considered?
•H
ave any potential crane boom obstructions been identified?
• What are the limits on wind speed for making this lift?
• Have the ground bearing support conditions been met?
•P
ower lines in the area? Clearance and a
spotter established?
• Counterweight swing area of the crane barricaded?
Hoisting Guide
PRIOR TO THE LIFT
• The rigging has been inspected before use
•T
he crane hook is positioned directly over the load’s centre
of gravity
•S
ofteners are used to protect the rigging where it could
be damaged
• The slings and rigging hardware positioned correctly?
•R
igging provides positive control of the load?
(no slipping/shifting)
• Safe load paths have been established
•T
ag lines are being used to control the load
(where appropriate)
•C
ommunications between signalperson and crane
operator have been established
Basic
Hitches
Basic Hitches
ACRA Enterprises, Inc. 800-992-0689 www.acratech.com
VERTICAL
eye & eye
endless
CHOKER
Working Load
Limits shown on
sling tags and
other charts are
based on the
angle of choke to
be 120 degrees
or greater.
BASKET
120°
Working Load Limits shown on sling tags and other
charts are based on both legs being vertical within 5
degrees.
90°
90°
-- Page 6 --
Page 5 -Hitch--Reductions
VERTICAL
CHOKER
BASKET
10,000 kg
WLL
7,500 kg
WLL
20,000 kg
WLL
VERTICAL
When angles, a smaller D/d ratios, or a tight
choke is used, the capacity of the hitch is MUCH
LESS than what is shown on the tag!
2 slings @ 30 degrees horizontal angle
120°
100%
50% reduction
CHOKER
120°
29°
90°
100%
49%
87%
BASKET
Low horizontal angles
the hitch capacity!
60°
90°
100%
87%
©2016 ACRA Enterprises, Inc - all rights reserved
154 Safety, Certainty, Great Service
Web / Roundsling
PERSONNEL
•T
he roles, responsibilities and qualifications for personnel
have been defined (P.I.C., Riggers, Signalperson, Crane
Operator, etc.)
• A pre-lift meeting has been held with all personnel
AFTER THE LIFT
• A post-lift inspection performed on the load and rigging
(in the locations subjected to forces applied from the lifting
and/or near softeners or where slings came in physical
contact with the load)
• A post-lift meeting is held (if applicable)
• Rigging equipment stored appropriately in proper location(s)
Chain Sling
RIGGING
•D
etermine the additional tensions based on the sling angles
•E
nsure all rigging has adequate capacity for the
additional tension
•A
re shackles correctly sized for the sling eyes?
D/d requirements met?
DURING THE LIFT
• Tension is gradually applied to the slings and rigging
is re-checked
• Lift and hold the load to verify the centre of gravity and
load stability
• Personnel are not under the load or travel path (includes
hands/feet)
• Personnel avoid being in the ‘line of re’ of tensioned rigging
• Lifted load is kept as close to the ground as possible
• Loads lifted high require extra distance for personnel
(potential for the load to swing or bounce if rigging fails
and the load falls)
Wire rope / Web Sling
LOAD
• Weight and centre of gravity has been determined
•A
nything inside/outside the load that could shift during the lift?
•D
etermine if the load needs protection against damage
from the rigging
•A
ll anchor bolts, hold downs, or fasteners have been removed
•P
otential for binding - are load cells required to verify the
load is free?
• Attachment points designed to take the load weight
• Is the load structurally capable of being lifted?
(bending/twisting issues)
30°
50%
v5 - 5/16





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