LOAD CHART & RIGGING PRACTICE EXERCISES TOWER CRANE Pecco SK 170 Tower Crane PRACTICE EXERCISES LCR.TC.PCSK170.P1 1 December 2010 + Fulford Harbour Group Tel: 604.952.6033 www.fulford.ca
Introduction These 10 questions are samples of the load chart and rigging part of your 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 the load chart and rigging part of the assessment to be competent. Copyright 2009 Fulford Harbour Consulting Ltd. All material in this document is, unless otherwise stated, the property of Fulford Harbour Consulting Ltd. Copyright and other intellectual property laws protect these materials. Reproduction or transmission of the materials, in whole or in part, in any manner, without prior written consent of the copyright holder, is a violation of copyright law. 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 #202-7950 Huston Road, Delta, BC, V4G 1C2, Canada Toll free: 1.888.952.6033 Lower Mainland: 604.952.6033 Fax: 604.952.6088 info@fulford.ca www.fulford.ca + Fulford Harbour Group 2
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? Jib length 45.4 metres Jib length 58.2 metres Trolley radius 30.5 metres Answer: kg www.fulford.ca + Fulford Harbour Group 3
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: www.fulford.ca + Fulford Harbour Group 4
5. Based on the following configuration, determine the gross capacity. Jib length 51.8 metres 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 www.fulford.ca + Fulford Harbour Group 5
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 angle of 50 degrees. Answer: inch www.fulford.ca + Fulford Harbour Group 6
Load Chart & Rigging PRACTICE Tower Crane Pecco SK 170 (1) Load Charts Pecco SK 170 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. www.fulford.ca + Fulford Harbour Group 7
Load Chart & Rigging PRACTICE Tower Crane Pecco SK 170 (1) 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. www.fulford.ca + Fulford Harbour Group 8
Wire Rope Slings Working Load Limit in pounds 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. www.fulford.ca + Fulford Harbour Group 9
Chain Slings Working Load Limit in pounds 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. www.fulford.ca + Fulford Harbour Group 10
Nylon Web Slings Working Load Limit in pounds 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: Capacities are for flat eye, twisted eye and triangle fittings. For training and assessment use only. www.fulford.ca + Fulford Harbour Group 11
TOOLBOX MEETING GUIDE! Hand signals for hoist and crane operations 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: STOP HOIST LOWER Arm extended, palm down, move hand horizontal. With forearm vertical, finger With arm extended down, pointing up, move hand in move forefinger; pointing small horizontal circles. down, move hand in circles. RAISE BOOM LOWER BOOM RAISE THE BOOM AND LOWER THE LOAD Arm extended, fingers closed, Arm extended, fingers closed, With arm extended, thumb Arm extended, fingers closed, thumb pointing upward. thumb pointing downward. pointing up, flex fingers in thumb pointing upward, other and out as long as load arm bent slightly with forefinger movement is desired. pointing down, and rotate hand. LOWER THE BOOM AND RAISE THE LOAD EXTEND BOOM RETRACT BOOM With arm extended, thumb Arm extended, fingers closed, Both fists in front of body, Both fists in front of body, down, flex fingers in and thumb down, other arm with thumbs pointing with thumbs pointing out as long as load vertical, forefinger upward outward. toward each other. movement is desired. and rotate hand. SWING MOVE SLOWLY DOG (STOP) EVERYTHING Arm extended, point in Use one hand to give any motion signal and place Clasp hands in front of body. direction of swing of boom. other hand motionless in front of hand giving the motion signal (hoist slowly shown as example) Workers Compensation Board of B.C. www.fulford.ca + Fulford Harbour Group 12
Answer Key 1. Answer: 21.3 metres Gross Load Load 6,120 kg Rigging 165 kg 6,285 kg The capacity 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. www.fulford.ca + Fulford Harbour Group AK1
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 angle of 45 degrees is 10,000 pounds. The capacity of a double basket hitch is 10,000 pounds x 2 = 10,000 pounds. www.fulford.ca + Fulford Harbour Group AK2