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Tower Crane PRACTICE EXERCISES LCR.TC.PCSK170.P1

1 December 2010

CraneSafe Certification + Fulford Harbour Group Tel: 604.952.6033 | www.fulford.ca

TOWER CRANE Pecco SK 170

LOAD CHART & RIGGING

PRACTICE EXERCISESCraneSafe Certification CraneSafe

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Load Chart & Rigging PRACTICE Tower Crane Pecco SK 170 (1)

www.fulford.ca CraneSafe Certification + Fulford Harbour Group 2

Introduction

These 10 questions are samples of the load chart and rigging part of your CraneSafe Certification Assessment for Tower Crane.

We have not included all of the charts for this crane - but everything you need to answer the questions is included in the load and jib charts you have here. You do not need the crane manual or full load chart package to answer the questions.

The crane industry in BC has stated that operators must get a minimum of 70% correct on the load chart and rigging part of the assessment to be competent.

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Printed copies of this document may be made, solely for personal, noncommercial use. Individuals must preserve any copyright or other notices contained in or associated with them. Users may distribute such copies to others, in electronic or printed form, without charge, without prior written consent of Fulford Harbour Consulting Ltd. Contact information for requests for permission to reproduce in any altered state, electronic or otherwise, or distribute for a charge or other consideration, this document or any other materials produced by Fulford Harbour Consulting Ltd are as listed below:

Fulford CraneSafe Certification #202 - 7950 Huston Road, Delta, BC, V4G 1C2, Canada Toll free: 1.888.952.6033 Lower Mainland: 604.952.6033 Fax: 604.952.6088 [email protected]

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Load Chart & Rigging Questions

1. What is the maximum radius this load can be placed in the following configuration?

• Jib length – 58.2 metres

• Load weight – 6,120 kg

• Rigging weight – 165 kg

Answer: metres

2. What is the difference in gross capacity between the two jib lengths?



• Trolley radius – 30.5 metres

Answer: kg



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3. What is the weight of the trip test block in the following configuration?

• Jib length – 170 feet

• Trolley radius – 170 feet

• Trip test block weight is five percent of tip capacity test block weight

Answer: pounds

4. Determine the highest hoist gear that can be used to perform this lift.

• 105hp (78kW) AC hoist installed

• Load weight – 14,880 pounds

• Rigging weight – 220 pounds

Answer:



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5. Based on the following configuration, determine the gross capacity.


• Radius – 25.9 metres

Answer: kg

6. What is the minimum size of wire rope sling required to lift a load of 7,100 pounds?

The vertical hitch is in a choked configuration.

Answer: inch



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7. What is the minimum size of wire rope slings required to lift a load of 17,500 pounds?

The sling is in a double basket configuration at an angle of 50 degrees.

Answer: inch



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Pecco SK 170

Load Charts

These charts are for assessment purposes only and should not be used to operate a crane.The individual crane’s load chart, operating instructions and other instructional plates must be read and understood prior to operating the crane.



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These charts are for assessment purposes only and should not be used to operate a crane. The individual crane’s load chart, operating instructions and other instructional plates must be read and understood prior to operating the crane.



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Wire Rope Slings

When using a 2-leg bridle in a choker hitch configuration, multiply the above values by .75.

When using a double basket hitch configuration, multiply the above values by 2.

Working Load Limit in pounds

Note: For training and assessment use only.



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Chain Slings


When using a 2-leg bridle in a choker hitch configuration, multiply the above values by .75.

When using a double basket hitch configuration, multiply the above values by 2.

Note: For training and assessment use only.



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Nylon Web Slings

Note: Capacitiesareforflateye,twistedeyeandtrianglefittings. Fortrainingandassessmentuseonly.

Whenusinga2-legbridleinachokerhitchconfiguration,multiplytheabovevaluesby.75.

Whenusingadoublebaskethitchconfiguration,multiplytheabovevaluesby2.




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Hand signals for hoist and crane operations

Page 1 of 2

If hand signals are used between a signaller and the operator of a crane or hoist to control hoisting operations,

the following signals should be used:

TG 07-29

STOP

RAISETHEBOOMANDLOWERTHELOAD

LOWERTHEBOOMANDRAISETHELOAD

HOIST

EXTENDBOOM

RAISEBOOM

SWING MOVESLOWLY DOG(STOP)EVERYTHING

LOWER

RETRACTBOOM

LOWERBOOM

Armextended,fingersclosed,

thumbpointingupward.

Armextended,pointin

directionofswingofboom.

Useonehandtogiveanymotionsignalandplace

otherhandmotionlessinfrontofhandgivingthe

motionsignal(hoistslowlyshownasexample)

Clasphandsinfrontofbody.


thumbpointingdownward.

Witharmextended,thumb

pointingup,flexfingersin

andoutaslongasload

movementisdesired.

Witharmextended,thumb

down,flexfingersinand

outaslongasload

movementisdesired.


thumbpointingupward,other

armbentslightlywithforefinger

pointingdown,androtatehand.


thumbdown,otherarm

vertical,forefingerupward

androtatehand.

Armextended,palmdown,movehandhorizontal. Withforearmvertical,finger

pointingup,movehandin

smallhorizontalcircles.

Bothfistsinfrontofbody,

withthumbspointing

outward.

Witharmextendeddown,

moveforefinger;pointing

down,movehandincircles.

Bothfistsinfrontofbody,

withthumbspointing

towardeachother.

TOOLBOX MEETING GUIDE

Workers’ Compensation Board of B.C.

!



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Answer Key

1. Answer: 21.3 metres

Gross Load

Load 6,120 kg

Rigging 165 kg

6,285 kg

The capacity at 23.3 metres is 7,030 kg.

2. Answer: 1,040 kg

Capacity at 30.5 metres

Jib 1 5,620 kg

Jib 2 4,580 kg

Difference = 1,040 kg

3. Answer: 320 pounds

The capacity of a 170 foot jib at the tip is 6,400 pounds.

Five percent of 6,400 pounds = 320 pounds (6400 pounds x 0.05 = 320 pounds)

4. Answer: Gear 1

The capacity of Gear 2 is 15,000 pounds.

The capacity of Gear 1 is 22,050 pounds.

The gross load weight is 14,880 + 220 = 15,100 pounds.

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5. Answer: 6,670 kg

The capacity of a 51.8 metre jib at a radius of 25.9 metres is 6,670 kg.

6. Answer: 3/4 inch

The capacity of one 3/8 inch chain in a choked vertical hitch is 7,650 pounds.

7. Answer: 5/8 inch

The capacity of a 5/8 inch sling at an angle of 45 degrees is 10,000 pounds.

The capacity of a double basket hitch is 10,000 pounds x 2 = 10,000 pounds.

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