4_ tower crane safety

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WSH COUNCIL - Crane Safety Symposium 2012

24th September

Tower Crane Safety

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WelcomeWelcomeTerence Tan

WelcomeWelcomeTerence Tan

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 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)



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)



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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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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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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