4_ Tower Crane Safety
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Transcript of 4_ Tower Crane Safety
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WSH COUNCIL - Crane Safety Symposium 2012
24th September
Tower Crane Safety
1
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WelcomeWelcomeTerence Tan
WelcomeWelcomeTerence Tan
Manitowoc Crane Care
Manitowoc Crane Care
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Grove mobile telescopic cranes
Manitowoc lattice-boom crawler cranes
National Crane boom trucks
Manitowoc Cranes
Products and Services
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Manitowoc Crane Care
Manitowoc Finance
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Manitowoc Crane Division
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Manitowoc Crane Care Division
Products and Services
Training, parts, documentation and
end-user support services Dedicated service for
all regions
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Support for the life of a product
International dealer network withmultiple locations
Support, training and parts servicecenter available worldwide 24/7
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Tower Crane Safety
Program Outlines:
1. Introduction
2. Types of Tower Crane
3. Safe Distances
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4. Fixing angles/Foundation5. Safety limit switches/Weathervaning
6. Operators Aids
7. Anti-Collision
8. Maintenance.
9. Counterfeit Parts and Consequences
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Types of Tower Crane
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Kinds of Jib
Self-erecting
More compact and easier totransport, this is an idealcrane for quick jobs in the
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city.
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Kinds of Jib
Fixed-jib
Meant for even the mostdemanding job
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,
tower crane is built forheavy lifting.
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Kinds of Jib
Luffing jib
For job sites whereoperating space is
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limited, a tower cranewith a luffing jib ispreferred.
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SELECTING A TOWER CRANE:
QUALITY (BRAND) Proven safe, meets the requiredproductivity performance, reliability, and in accordancewith international standards. TYPE APPROVED.
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. .
AFTER-SALES SUPPORTS (PARTS & SERVICE) 24/7 supportavailable? Local representative?
LEASE OPTION, RENT-TO-OWN, FINANCINGCONSIDERATIONS.
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Maximum carrying load required
Replace graybox with image
MCi85A/B MC115B MC175B MC205B MC235BMC310-K12
75LVF30MC310-K1270RCS30 MC310-K16 MC475-M25
MCR22575LVF35
MCR225100LVF35
5t 6t 8t 10t 10t 12t 16t 25t 14t
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. ,
utmost importance that you choose the crane that cancarry the load that your job requires.
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Maximum free-standing height (m)
MCi85A/B MC115B MC175B MC205B MC235B
MC310-K12
75LVF30
MC310-K12
70RCS30 MC310-K16 MC475-M25
MCR225
75LVF35
MCR225
100LVF35
35.70 44.90 44.90 59.70 59.70 57.50 56.90 74.91
56.4 (at the shortest
jib length)
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or e cons ruc on o s yscrapers an a s ruc ures, owercranes are used with anchors to achieve towering heights.
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Maximum jib length (m)
MCi85A/B MC115B MC175B MC205B MC235BMC310-K12
75LVF30MC310-K1270RCS30 MC310-K16 MC475-M25
MCR22575LVF35
MCR225100LVF35
50 55 60 60 65 70 70 80 30m
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With the wide range of jib lengths available, its easy tocover the operation radius required by varying projects.
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Min. Ground/Base Reqd. (Chassis) (m)
MCi85A/B MC115B MC175B MC205B MC235BMC310-K12
75LVF30MC310-K1270RCS30 MC310-K16 MC475-M25
MCR22575LVF35
MCR225100LVF35
3.8 x 2.8
4.5 x
4.5
4.5 x
4.5
6.0 x
6.0
6.0 x
6.0 6.0 x 6.0 6.0 x 6.0 8.0 x 8.0
6.7 x 6.4 (static
cranes)
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Ground space is one of the most important factors toconsider in choosing what crane to use. Potains wide modelrange provides you ample options that you can choose from.
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Other Criterion
Min./Max. Trolley Speed (m/min)
Min./Max. Hoist Speed (m/min) (depends on load)
Min./Max. Slewing Speed (rev/min)
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Min./Max. Travel Speed (m/min)
Min. Electric power requirement (kVA)
Min, Genset power requirement (kVA)
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Respect Distances
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Respect Distances
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Fixing Angles/Foundation
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Fixing Angles/Foundation
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Fixing Angles/Foundation
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Safety Devices
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Limit Switches
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Load Limiters
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Anemometer (Wind Meter)
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Weathervaning -
Putting the crane out of service
The crane should be in free slewing/weather vaning mode (rotation in
360
)
No load suspended on the crane
Raise the hook before the limit switch operates
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Move the trolley close to the crane tower
Tighten the rails clamps (for travelling cranes)
Cut off the current by means of the isolating switch and lock this latter by
means of a padlock
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Weathervaning -
Storm Wind Speed Out of Service
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Recommended parking angle varies depending on jiblength, crane height and crane model.
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Weathervaning Limit Switch
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Anti Collision Top Tracing
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Anti Collision Top Tracing
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Anti Collision Top Tracing
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Anti Collision Top Tracing
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CRANE MAINTENANCE
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Maintenance Schedule
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Maintenance of Slewing Mechanism
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Trolley Winch Maintenance
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RCS Hoist Winch Mechanism
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LVF Hoist Winch Mechanism
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Maintenance of the Mast Panels
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Maintenance of the Rope Angle Corrector
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Cable Winder Maintenance
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Adjusting the Tension of the Cable
The tension of the cable is ensured by a torquetransmitted by a friction drive. To adjust the torque,proceed as follows:
-The adjustment must be carried out with hot motor
-Unscrew the plug (1), turn it around and introduce it intothe filling hole in order to block the adjusting screw (2)
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-on the side of the cable winder) so as to increase the
torque of the friction drive and to the left (B) to decreaseit.
- The torque is exact when the cable bears at standstill onthe lower roller of the guide roller box
- The friction drive must never be blocked:
-- neither to the right risk of damage of the frictionpulley
-- nor to the left risk to decentrate the collectorwith respect to the brush-holders
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Fishplate Shaft Maintenance
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Genuine Parts
Importance of using original
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COUNTERFEIT COMPONENTS
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Cranes Today, July 2007
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WHY ARE COUNTERFEIT COMPONENTS
DANGEROUS FOR US?
Legal Issue Manufacturer & Govt. Bodies specify only originalparts can be used on crane
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Safety Issue
Sub-standard material can affect cranes stability
Liability Issue
Original manufacturer will void the warranty and no
insurance will cover your lost.
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SAFETY ISSUE
1. Source of Steel
What is the source?
- A general steel mill certificate provided by the steel
manufacturer or by the general supplier will tell us the
type of steel received, and the details about its
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.
What is the steel mills manufacturing process?
The manufacturing process employed by the
steel mill has the most important role inassuring the steels quality.
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SAFETY ISSUE
1. Source of Steel
What is the source? (cont)
Poor quality control during the steelmaking processmay cause cracks in the product.
Counterfeiter will not buy good steel in order
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Strength: The ability of the steel to withstand certain
amount of load without breaking Some of the materials used on tower section
counterfeits are weaker than required and do not
SAFETY ISSUE
2. Grade of Steel (Strength & Ductility)
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meet the necessary minimum static strengthrequirements.
Consequently, there is a much higher risk ofmaterial breakages, resulting in a higher risk of the
crane stability.
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Ductility: The mechanical propertyof the steel that enables it to
sustain plastic deformation beforebreaking
B Grade steel has good ductility at
SAFETY ISSUE
2. Grade of Steel (Strength & Ductility)
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at zero degree. D Grade steel hasthe same ductility of B Grade steelat -20 degrees C.
Ductile steel gives a warning before it fails- it deforms before it
breaks. Brittle steel will fail without warning.
For Tower Crane, Manitowoc uses the Potain ST1011 standard
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A good quality management system in the factory isessential to produce good and consistent product to
exact dimensions and tolerances. Counterfeiters copy us but they dont copy our
manufacturing standard.
SAFETY ISSUE
3. Standard of Manufacturing
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POTAIN COUNTERFEITER
VS
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Manitowocs Quality management
system is certified to ISO 9001 byGerman certification TV.
What is the quality system used by
SAFETY ISSUE
3. Standard of Manufacturing
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e coun er e er
Who certifies them? Are thecertification body qualified?
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Fatigue cycle: The number of work cycle provided by a
component before it fails due to fatigue stress
When you use steel from an unknown steel supplierwith weaker strength and lower Grade compounded
with sub-standard weld joints & inconsistent
SAFETY ISSUE
4. Working (Fatigue) Cycle
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manufacturing process, what can you expect?Do the counterfeiter test their part for fatigue?
Original Manitowoc components come with the
assurance that these parts will fully withstand the
stresses imposed on them for the lifetime of the
equipment.
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LIABILITY ISSUES
No Insurance Coverage
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If a person combines crane parts from different manufacturers andputs it in circulation then that person, in legal terms, becomes a
manufacturer and is responsible for declaring that the entire craneconforms with certain recognized safety standards such as CE.
In Europe, the industrys liability insurance association argued that
LIABILITY ISSUES
No Insurance Coverage
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combinations of components from different manufacturers required
these cranes to be certified by a third party expert throughpreliminary design and approval tests.
Previous examinations of individual components are rendered invalidonce these components are combined.
A fresh examination must be carried out in full on the new craneconfiguration.
Responsibilities Everyone plays a part
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Responsibilities Everyone plays a part
Tower Crane Safety = Zero Accident Manufacturer/Industry/Authority Crane O erator
Potain Tower Cranes57
Crane Owner Others Safety officer, Project Manager
etc
RESPONSIBILITIES OF A
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RESPONSIBILITIES OF A
CRANE OPERATOR
Only certified & qualified operators should bepermitted to operate cranes.
Exercise caution necessary for the safe operation of theirequipment. Adhere to instructions in crane manual.
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Report any unsafe conditions, (including defects in themachine) to supervisor immediately.
Check that all hitches are secured and all loosematerial is removed before lifting.
Act on any emergency stop signal.
RESPONSIBILITIES AS A CRANE
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RESPONSIBILITIES AS A CRANE
OWNER
Crane accidents can be avoided through:
Adherence to the Manufacturers Instructions Cranes loading capacity
Lifting radius, weight & height should
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be determined before a lift takes
place. No loads should be lifted out of the
cranes lifting capacity.
Buy only genuine Parts from Manufacturer orAuthorized Dealers!!
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Any Questions..
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Thank You ForListening
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