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Grove
Published 3-25-2020, Control # 643-04
2-21
GRT880 OPERATOR MANUAL
SAFETY INFORMATION
2
Multiple Crane Lifts
Multiple crane lifts are not recommended.
Any lift that requires more than one crane must be precisely
planned and coordinated by a qualified person. If it is
necessary to perform a multi-crane lift, the operator shall be
responsible for assuring that the following minimum safety
precautions are taken:
•
Secure the services of a qualified person to direct the
operation.
•
Make sure that all signals are coordinated through the lift
director or person in charge of the lift.
•
Coordinate lifting plans with the operators, designated
person, and signal person prior to beginning the lift.
•
Maintain communication between all parties throughout
the entire operation. If possible, provide approved radio
equipment for voice communication between all parties
engaged in the lift.
•
Use outriggers on cranes so equipped.
•
Calculate the amount of weight to be lifted by each crane
and attach slings at the correct points for proper weight
distribution.
•
Make sure that the load lines are directly over the attach
points to avoid side loading and transfer of loading from
one crane to the other.
•
Do not travel. Lift only from a stationary position.
Lifting Multiple Loads
Grove recommends lifting only one load at a time.
Lifting two or more separately rigged loads at one time is only
permitted during steel erection in accordance with
29CFR1926.753 when the following criteria are met:
1926.753(e)(1) A multiple lift shall only be performed if the
following criteria are met:
•
1926.753(e)(1)(i) A multiple lift rigging assembly is used;
•
1926.753(e)(1)(ii) A maximum of five members are
hoisted per lift;
•
1926.753(e)(1)(iii) Only beams and similar structural
members are lifted; and
•
1926.753(e)(1)(iv) All employees engaged in the
multiple lift have been trained in these procedures in
accordance with § 1926.761(c)(1).
•
1926.753(e)(1)(v) No crane is permitted to be used for a
multi ple l ift w here suc h use is c ontrary to the
manufacturer's specifications and limitations.
1926.753(e)(2) Components of the multiple lift rigging
assembly shall be specifically designed and assembled with
a maximum capacity for total assembly and for each
individual attachment point. This capacity, certified by the
manufacturer or a qualified rigger, shall be based on the
manufacturer's specifications with a 5 to 1 safety factor for all
components.
1926.753(e)(3) The total load shall not exceed:
•
1926.753(e)(3)(i) The rated capacity of the hoisting
equipment specified in the hoisting equipment load
charts;
•
1926.753(e)(3)(ii) The rigging capacity specified in the
rigging rating chart.
1926.753(e)(4) The multiple lift rigging assembly shall be
rigged with members:
•
1926.753(e)(4)(i) Attached at their center of gravity and
maintained reasonably level;
•
1926.753(e)(4)(ii) Rigged from top down; and
•
1926.753(e)(4)(iii) Rigged at least 7 feet (2.1 m) apart.
1926.753(e)(5) The members on the multiple lift rigging
assembly shall be set from the bottom up.
1926.753(e)(6) Controlled load lowering shall be used
whenever the load is over the connectors.
Tilt-Up Panel Lifting
Requirements and recommendations regarding operation
and use of Grove cranes are stated on decals and in the
Operator Manual provided with each specific model
machine. Using the subject crane to perform tilt-up panel
lifting with two hoist lines poses new and different hazards
than does normal lifting use.
Therefore, the following additional precautions must be
taken if it is necessary for the crane to be used to perform tilt-
up panel lifting using a crane equipped with two hoists:
•
The crane must be set up and operated in accordance
with Grove’s instructions in the Operator Manual, Load
Capacity Chart, and decals affixed to the crane.
•
The hoist rope from the main hoist shall be reeved over
the main boom nose reeved for two parts of line.
•
The hoist rope from the auxiliary hoist shall be reeved
over the auxiliary boom nose reeved for one part of line
or up to two parts of line depending on the applicable
load chart ratings.
•
The load shall be connected with the main hoist line
connected to the end closest to crane and the auxiliary
hoist line connected to the end farthest from the crane.
Содержание Grove GRT880
Страница 1: ...Operator Manual Grove GRT880 8968 ...
Страница 4: ...THIS PAGE BLANK ...
Страница 10: ...TABLE OF CONTENTS GRT880 TOC 6 THIS PAGE BLANK ...
Страница 16: ...INTRODUCTION GRT880 OPERATOR MANUAL 1 6 Published 3 25 2020 Control 643 04 THIS PAGE BLANK ...
Страница 54: ...SAFETY INFORMATION GRT880 OPERATOR MANUAL 2 38 Published 3 25 2020 Control 643 04 8496 3 FIGURE 2 10 ...
Страница 166: ...SET UP AND INSTALLATION GRT880 OPERATOR MANUAL 4 24 Published 3 25 2020 Control 643 04 THIS PAGE BLANK ...
Страница 198: ...5 32 Published 3 25 2020 Control 643 04 MAINTENANCE AND LUBRICATION GRT880 OPERATOR MANUAL THIS PAGE BLANK ...
Страница 200: ...OPERATOR MANUAL GRT880 6 2 THIS PAGE BLANK ...
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