our group presentation

1. WELCOME TO
OUR
PRESENTATIO
N
FARID AFFENDY B. MOHD. FAIZAL
MOHD. SHAZWAN B. SHERIDAN
MUHAMMAD RUZAINI B. M. HARON
YESSI FAUZIAH BT. MARWAN
MDM. ROSNAH BT. ABD. RAHMAN (OSH 2213)

2. INTRODUCTIO
N : TOWER
CRANE
 Tower CRANE is a jib or  Tower cranes often give the
boom crane mounted on a best COMBINATION
tower structure, of height and lifting
demountable or permanent, capacity and are used in
including both horizontal and the construction of tall
luffing jib types. buildings.
 Tower cranes are commonly  The construction crew
employed in uses the tower crane to
CONSTRUCTION LIFT
INDUSTRY for the MATERIALS such
movement of materials . as steel, concrete, large
tools and generators.
OCCUPATIONAL SAFETY (OSH

3. INTRODUCTION :
TYPES OF TOWER
CRANETower
Luffing Jib
Crane
Hammerhead Tower
Crane
Self-Erecting Tower
Cranes
OCCUPATIONAL SAFETY (OSH

4. INTRODUCTION :
ERECTION OF TOWER
CRANE
OCCUPATIONAL SAFETY (OSH

5. TOWER CRANE
:
COMPARTMEN
T
OCCUPATIONAL SAFETY (OSH

6. TOWER CRANE
:
COMPARTMEN
TCOMPARTMENT FUNCTION
Base Bolted to a large concrete pad that supports the
crane
Mast (tower) Connected to the base
Give the tower crane its height
Operator’s cab Cab at the top of the tower from which the
operator manipulates the crane.
Counter jib Metal lattice that supports the ballast.
Counter jib ballast Concrete mass attached to the counter jib to
balance the weight of the jib and its load.
OCCUPATIONAL SAFETY (OSH

7. TOWER CRANE
:
COMPARTMEN
TCOMPARTMENT FUNCTION
Main winch / motors Provide means to lifts the load, along with the
control electronics that drive it.
Jib tie Metal cable that distributes the tension.
Crane runaway Girders along and under which the trolley runs.
Jib Metal lattice that pivots on the tower and lifts and
extends the hoisting system.
Hoisting rope Durable cable of variable length for manipulating
loads.
Hoisting block System of pulleys that work with the trolley pulley
to improve leverage to lift heavy loads.
OCCUPATIONAL SAFETY (OSH

8. TOWER CRANE
: HAZARDS
HAZARDS ACTIVITY
Fall from height Carrying out inspection
Maintenance
Working from suspended platforms
Slip, trips and falls Carrying heavy or bulky loads on wet ground.
Falling object During carrying and moving loads
Electrocuted Defective installations and equipment
Lighting Strike Working during rough weather
Heat Stress Exposed to strong sunlight
OCCUPATIONAL SAFETY (OSH

9. TOWER CRANE
:
Plan and prepare for lifting
Conduct pre-operational
Shut down and secure routine checks
crane
BASIC
PROCEDURE
Perform the lift Conduct post start up
checks
Maneuver crane
OCCUPATIONAL SAFETY (OSH

10. TOWER CRANE : BASIC
PROCEDURE
Plan and prepare for lifting
Site specific work •Supervisor brief to crane operator, slinger, signaller
instructions and who involve with crane work regarding job
task. (load and where to move?)
Identify site •Crane will not be operated in unsafe condition.
specific hazards •Eg; high voltage lines, excessive temp. , pedestrian
traffic.
Safety •Safety Helmet – falling object
requirements •Puncture resistant gloves
•Safety glasses
Appropriate Load •The weight of the load is correctly estimated in
consultation with associated personnel.
OCCUPATIONAL SAFETY (OSH

11. TOWER CRANE : BASIC
PROCEDURE
Conduct pre-operational routine checks
Prior to operation, •Operator verify path/direction of crane travel
equipment and site area is free from debris/stored equipment and
walk the path before load is engaged.
Ground/base has been •Authorized personal will inspect the base of
certified crane and certified if it safe.
Counterweights/outrigg •Balance with the load (consult by s/visor)
ers and stabilizers •Average tower crane – 20 Tons if load 18 Tons
according to verified load plan.
Routine pre-operational •Lifting accessories must be safe & thoroughly
equipment checks examined by a competent person every 6
months.
OCCUPATIONAL SAFETY (OSH

12. TOWER CRANE : BASIC
PROCEDURE
Conduct post start up checks
Operating radius is •Signaller - relaying the signal from the slinger to
clear of obstruction the crane operator.
•Directing the safe movement of the crane.
Attachments, •Lifting beams
movements and •Telescoping coil grabs
control functions •Automatic ingot
•Magneting lifiting devices
•Slab tongs
The operating, •Operating and emergency controls and safety
emergency controls devices are located and identified
and safety devices •Correct operation tested in accordance with
prescribed procedures.
Defects and damage •Inspect slings, shackles, and ropes before and
are reported after use. Inform Supervisor.
OCCUPATIONAL SAFETY (OSH

13. TOWER CRANE : BASIC
PROCEDURE
Maneuver crane
Radius of loads •Radius is planned to minimize danger to people
and facilities in accordance with the plan.
•Unbalanced load – unsafe – create additonal strain
and stress on crane.
•Ensure that people involved in any lifting operation
Crane Operators. are competent to carryout their work safely.
•Activities are co-ordinated with riggers/doggers
OCCUPATIONAL SAFETY (OSH

14. TOWER CRANE : BASIC
PROCEDURE
Perform the lift
Load •Load well secured and properly balanced in the
characteristics sling or lifting devices.
•Visible to the Crane’s operator
Traffic flow and •Signaller – aware particular care at cross aisles,
work area doorways, and other location where pedestrians
conditions may step into the path of travel of the crane.
Crane controls and •Test all operator pendant controls for safe
functions operation.
Monitoring systems •Sound a horn or warning signal – approaching
and alarms potential high traffic areas.
OCCUPATIONAL SAFETY (OSH

15. TOWER CRANE : BASIC
PROCEDURE
Shut down and secure crane
•Crane is shut down •Crane will stop the operation once in
order of supervisor.
•Only competence person is allowed.
Plant, tools and equipment are • Authorized repair personnel is
cleaned, checked, maintained permitted to inspect and maintain
and stored according manufacturer’s.
Work area has been cleared • Perform housekeeping within the
path of travel of the crane.
The crane and equipment is • Proper storage and maintenance of
correctly stowed and secured all cables, chains, nylon ropes, slings
and lifting devices
OCCUPATIONAL SAFETY (OSH

16. TOWER CRANE
: ACCIDENT
CASE 2011 - A tower crane
• September
fell onto three residential houses
in Georgetown, Penang, Malaysia
• Causing fatal to a Chinese man
while his family suffer major
injuries
• Minor damage to a nearby
commercial building
• The tower crane was used on the
site of a new 20 floor hotel on the
opposite side of the street from
the affected home,
• Failure of the crane's foundation
and weather condition(strong
wind)

17. TOWER CRANE
: ACCIDENT • 3 February 2009 at about 3.00pm at a
construction site, Ayer Keroh Melaka.
CASE • Collision of two tower cranes of luffing and
hammerhead types.
• During the incident, the luffing tower crane was
lowering down concrete formwork structures into
the transporter lorry while the hammerhead
tower crane was slewing.
• Both cranes were operating adjacent to each
other when part of their working radius and
crane height overlapped with one another.
• Mainly caused by insufficient safety clearance
distance for both cranes that led to the collision.
• Failure of the employer to consider the
planning, management and traffic control of
tower crane operation.