CP Presentation_load Charts_Sthephen Holmes

Presenter: STEPHEN HOLMES

Topic:

PRESENTER

Stephen Holmes

Load Chart Application - The Impact of SLOPE -

And a few other odds & sods


OH&S RegulationsAustralian StandardsOperators Manuals

Documents Referred To


High

Risk

Pla

nt


Accidents Happen for a Reason


OVER-LOADING?


BACKWARD TIPPING



Accidents Happen for a Reason



Slewing Mobile CranesMUST BE SET UP LEVEL


GROUND SLOPE & CONDITION


STABILITY ISSUES


ABREVIATIONS, TERMINOLOGIES & COMPONENTS

Stabilizers

As fitted toVehicle Loading Cranes(Truck wheels toremain on the ground)


ABREVIATIONS, TERMINOLOGIES & COMPONENTS

Outriggers

As fitted toSlewing MobileCranes(Truck wheels tobe OFF theground)


Counterweight


CraneTerms

Boom Length

Boom Angle

Working Radius


CraneTermsNon Slewing Crane


CraneTerms

Non Slewing CraneArticulation Joint


Types ofNON SLEWING MOBILE CRANES

Tractor CraneArticulatedPick & Carry


Working Zones


• All cranes MUST have a load chart• It MUST be in English• It MUST be legible• It MUST be in a position where you can read it

• Charts are calculated under IDEAL conditions• Crane set up correctly to manufacturers spec’s• Good weather conditions• Firm, level, supporting ground

LOAD CHARTS


Load Chart Slewing Mobile CraneSelect the BOOM you are working on

Select the RADIUSYou are working at

11 200

Read the RATED CAPACITY at this position

Boom Angle


DEDUCTIONS TO MAKE

MAIN Hook

FLY Jib

AUX Hook


DEDUCTIONS TO MAKEMAIN Hook………….……460 kgs

FLY Jib………………….1,200 kgs

AUX Hook ………………. 100 kgs

TOTAL Deductions...…1,760 kgs


DEDUCTIONS TO MAKERATING of CRANE……..11,200 kgs

LESS Deductions………..1,760 kgs

LOAD allowable on Main….9,440 kgs


STRUCTURAL & STABILITY Ratings

ABOVE line STRENGTH

BELOW line STABILITY


Are all Equal BoomLengths Equal?


This chart has5 different SWL readings for a 33.9m boom!



12 tm 12 tm

CRANE STABILITY

4 metres 4 metres


12 tm 12 tm

CRANE STABILITY

100% oftipping

4m 8m


Australian Stds requireslewing mobile cranes

load chartsto be calculated at

75% of tipping

CRANE STABILITY


12 tm 12 tm

CRANE STABILITY

100% oftipping

4m 8m

1.125 tonne would be maximum allowableload to be marked on the load chart - Which is 75% of 1.5 tonne


CRANE STABILITYPercentage of TIPPING

Aus.Std. requirements for all cranes

1. Vehicle Loading Cranes – 80%

2. Slewing Mobile Cranes – 75%

3. Pick & Carry (non slewing) – 66.6%


CRANE STABILITY20 tonne

4m20t x 4m = 80tm

6 tonne10m

6t x 10m = 60tm


CRANE STABILITY20 tonne

3m20t x 3m = 60tm

6 tonne11m

6t x 11m = 66tm


NON SLEWING CRANES


Load Chart Franna

Slewed less than 10°Slewed more than 10°

Boom Length

Boom Angle

Radius in Metres


42 mt

66% of Tipping


34.4 mt80% of Tipping


BUTSLEW ANGLE

Is not the ONLY thingThat will affect theSWL of the CRANE

THESLOPE OF THE GROUND

CAN HAVE AMAJOR IMPACT



Load Chart Franna Boom Length

Boom Angle


12m boom40° boom angle

2850kg SWL

1710kg SWL


