Podcast
Questions and Answers
What should be confirmed before testing the anti-two block alarm?
What should be confirmed before testing the anti-two block alarm?
- The alarm system is functioning properly
- All assembly and safety pins are present and correctly in place (correct)
- The weight is not suspended
- Only the hook block is present
What is the correct procedure for activating the anti-two block alarm?
What is the correct procedure for activating the anti-two block alarm?
- Test the alarm without any weight attached to the hook block
- Lower the hook block until the weight is on the ground before testing the alarm
- Raise the hook block until it is just below the suspended weight and then proceed slowly (correct)
- Raise the hook block quickly until the alarm sounds
Which information is NOT typically displayed on a mobile crane hook block?
Which information is NOT typically displayed on a mobile crane hook block?
- The operator's name (correct)
- Manufacturer's plate
- Weight of Hook Block
- Capacity or SWL
What risk must be avoided during the testing of the anti-two block alarm?
What risk must be avoided during the testing of the anti-two block alarm?
What is the weight of the hook block mentioned in the information provided?
What is the weight of the hook block mentioned in the information provided?
Which of the following must be confirmed during the examination of hoist drums?
Which of the following must be confirmed during the examination of hoist drums?
What is a necessary condition concerning hydraulic hoses in hoist drums?
What is a necessary condition concerning hydraulic hoses in hoist drums?
What indicates a problem with the operation of a hoist drum?
What indicates a problem with the operation of a hoist drum?
Who is primarily responsible for conducting a detailed examination of wire rope?
Who is primarily responsible for conducting a detailed examination of wire rope?
What should be followed along with manufacturer instructions during the examination of wire ropes?
What should be followed along with manufacturer instructions during the examination of wire ropes?
What must the examiner record in the examination report format?
What must the examiner record in the examination report format?
In what form can the degree of severity be presented according to the guidelines?
In what form can the degree of severity be presented according to the guidelines?
What action might the examiner take if the rope is deemed safe?
What action might the examiner take if the rope is deemed safe?
How does the examiner determine the total combined severity for the rope?
How does the examiner determine the total combined severity for the rope?
What specific factors are evaluated to determine the '% severity rating'?
What specific factors are evaluated to determine the '% severity rating'?
What factor is NOT considered when determining the frequency of inspections for hoists?
What factor is NOT considered when determining the frequency of inspections for hoists?
Which of the following is a way to express the percentage rating of severity from an inspection?
Which of the following is a way to express the percentage rating of severity from an inspection?
What is the primary purpose of keeping an inspection record for wire ropes?
What is the primary purpose of keeping an inspection record for wire ropes?
Which method is NOT mentioned as a way to assess deterioration during inspections?
Which method is NOT mentioned as a way to assess deterioration during inspections?
In what scenario might a competent person require more frequent inspections beyond original recommendations?
In what scenario might a competent person require more frequent inspections beyond original recommendations?
Which classification could lead to a determination of more frequent inspections?
Which classification could lead to a determination of more frequent inspections?
What does the combined effect assessment refer to?
What does the combined effect assessment refer to?
Which of the following is NOT a consideration for the frequency of inspecting hoists?
Which of the following is NOT a consideration for the frequency of inspecting hoists?
What is the minimum height at which the load should be held during the test?
What is the minimum height at which the load should be held during the test?
During the test, how should the load be slewed to assess structural integrity?
During the test, how should the load be slewed to assess structural integrity?
What should be examined after the completion of the overload test?
What should be examined after the completion of the overload test?
Which of the following information is NOT typically found on the manufacturer's information plate?
Which of the following information is NOT typically found on the manufacturer's information plate?
What should be checked regarding the windscreen wipers and washers?
What should be checked regarding the windscreen wipers and washers?
How should lights, including headlights and indicators, be assessed during a thorough examination?
How should lights, including headlights and indicators, be assessed during a thorough examination?
Which statement about reversing alarms/lights in cranes is accurate?
Which statement about reversing alarms/lights in cranes is accurate?
What must be ensured about the markings on the manufacturer's information plate?
What must be ensured about the markings on the manufacturer's information plate?
What action must be taken if equipment is to be removed from service?
What action must be taken if equipment is to be removed from service?
What priority issues should be reported when completing reports?
What priority issues should be reported when completing reports?
During the debrief meeting, what should primarily be presented?
During the debrief meeting, what should primarily be presented?
Which behavior is essential for all equipment users in a professional context?
Which behavior is essential for all equipment users in a professional context?
What is a key component to identify when detailing repairs needed?
What is a key component to identify when detailing repairs needed?
Before leaving a site, what is a critical action to ensure customer satisfaction?
Before leaving a site, what is a critical action to ensure customer satisfaction?
What types of tools may a Mobile Crane examiner require?
What types of tools may a Mobile Crane examiner require?
What is the primary focus of continuous professional development (CPD)?
What is the primary focus of continuous professional development (CPD)?
What does the examiner determine after summing up the individual severity ratings?
What does the examiner determine after summing up the individual severity ratings?
Which of the following factors does NOT contribute to the '% severity rating' during the examination?
Which of the following factors does NOT contribute to the '% severity rating' during the examination?
When might an examiner choose to reduce the time before the next examination?
When might an examiner choose to reduce the time before the next examination?
In what format can the degree of severity be recorded aside from a percentage?
In what format can the degree of severity be recorded aside from a percentage?
What is the significance of ensuring that assembly and safety pins are correctly in place before testing the anti-two block alarm?
What is the significance of ensuring that assembly and safety pins are correctly in place before testing the anti-two block alarm?
What should the examiner primarily focus on to assess if a rope is safe to continue in service?
What should the examiner primarily focus on to assess if a rope is safe to continue in service?
Which of the following pieces of information is NOT essential to be clearly legible on a hook block?
Which of the following pieces of information is NOT essential to be clearly legible on a hook block?
During the testing of the hook block, what is the primary purpose of slowly raising the hook block until the alarm activates?
During the testing of the hook block, what is the primary purpose of slowly raising the hook block until the alarm activates?
If the manufacturer’s plate is not located on the side of the hook block, where is it most likely to be found?
If the manufacturer’s plate is not located on the side of the hook block, where is it most likely to be found?
What potential hazard should be particularly monitored while raising the hook block during the alarm test?
What potential hazard should be particularly monitored while raising the hook block during the alarm test?
What essential feature must be ensured about the wire rope anchor used in cranes?
What essential feature must be ensured about the wire rope anchor used in cranes?
What should be checked regarding the boom tip sheave assemblies during an examination?
What should be checked regarding the boom tip sheave assemblies during an examination?
What happens if the wire rope fitted with a button type anchor gets damaged near its fitting?
What happens if the wire rope fitted with a button type anchor gets damaged near its fitting?
Which component is crucial in ensuring the functionality of the wire rope during operation?
Which component is crucial in ensuring the functionality of the wire rope during operation?
What is a common issue that might arise from severe damage to a boom tip sheave?
What is a common issue that might arise from severe damage to a boom tip sheave?
What does the presence of wear on the rope guides indicate during an examination?
What does the presence of wear on the rope guides indicate during an examination?
Which statement correctly describes the two methods for anchoring wire hoist ropes?
Which statement correctly describes the two methods for anchoring wire hoist ropes?
What should be done to ensure the sheaves are functioning correctly?
What should be done to ensure the sheaves are functioning correctly?
What is the primary purpose of the LEEA Mobile Cranes Diploma qualification?
What is the primary purpose of the LEEA Mobile Cranes Diploma qualification?
Which aspect of mobile cranes is included in the scope of the MOB course?
Which aspect of mobile cranes is included in the scope of the MOB course?
What knowledge area is emphasized in the learning outcomes of the MOB course?
What knowledge area is emphasized in the learning outcomes of the MOB course?
Which type of examination is specifically part of the curriculum in the Mobile Cranes Diploma?
Which type of examination is specifically part of the curriculum in the Mobile Cranes Diploma?
Which of the following is a critical factor that students learn to assess during their training?
Which of the following is a critical factor that students learn to assess during their training?
What competency is required for students completing the Mobile Cranes Diploma?
What competency is required for students completing the Mobile Cranes Diploma?
What kind of tools and equipment are covered in the MOB course?
What kind of tools and equipment are covered in the MOB course?
Which aspect constitutes an important part of the Mobile Cranes Diploma's objectives?
Which aspect constitutes an important part of the Mobile Cranes Diploma's objectives?
What is the primary advantage of yard cranes compared to rough terrain cranes?
What is the primary advantage of yard cranes compared to rough terrain cranes?
Which characteristic distinguishes crawler mounted telescopic cranes from wheeled cranes?
Which characteristic distinguishes crawler mounted telescopic cranes from wheeled cranes?
What is an essential focus of BS7121-2-1 and BS7121-2-3 standards?
What is an essential focus of BS7121-2-1 and BS7121-2-3 standards?
In what situations might a yard crane need to be equipped with outriggers?
In what situations might a yard crane need to be equipped with outriggers?
Why is it noted that the undercarriage inspection for crawler mounted telescopic cranes differs from wheeled cranes?
Why is it noted that the undercarriage inspection for crawler mounted telescopic cranes differs from wheeled cranes?
What primary feature do telescoping cranes provide for on-site work?
What primary feature do telescoping cranes provide for on-site work?
What is a common misconception regarding yard cranes?
What is a common misconception regarding yard cranes?
What significant determination can be made from the criteria provided by ISO9927-1 and ISO9927-5?
What significant determination can be made from the criteria provided by ISO9927-1 and ISO9927-5?
What action must be taken if a crane frequently works near personnel?
What action must be taken if a crane frequently works near personnel?
Which factor might warrant changing the interval of thorough examinations?
Which factor might warrant changing the interval of thorough examinations?
Under what circumstance could a mobile crane be used for lifting people?
Under what circumstance could a mobile crane be used for lifting people?
What should be done following an inspection and assessment of a crane?
What should be done following an inspection and assessment of a crane?
Who is responsible for deciding whether to change the interval of thorough examinations?
Who is responsible for deciding whether to change the interval of thorough examinations?
What must in-house examiners have to ensure proper examinations?
What must in-house examiners have to ensure proper examinations?
What could necessitate a competent person to review an in-service lift plan?
What could necessitate a competent person to review an in-service lift plan?
What might be a factor in determining the thorough examination frequency due to environmental conditions?
What might be a factor in determining the thorough examination frequency due to environmental conditions?
What should be checked regarding the hydraulic system before setting up the crane?
What should be checked regarding the hydraulic system before setting up the crane?
What is the primary reason for closely observing hydraulic rams when fitting counterweights?
What is the primary reason for closely observing hydraulic rams when fitting counterweights?
What is a critical action to perform after engaging the Power Take Off connection?
What is a critical action to perform after engaging the Power Take Off connection?
Which of the following is a critical check that must be performed before operating the crane with fitted counterweights?
Which of the following is a critical check that must be performed before operating the crane with fitted counterweights?
Which of the following is NOT part of the examination checks for the hydraulic system?
Which of the following is NOT part of the examination checks for the hydraulic system?
When checking leaf spring suspension, which aspect is NOT necessary?
When checking leaf spring suspension, which aspect is NOT necessary?
What aspect of counterweight deployment can indicated a malfunction if not observed?
What aspect of counterweight deployment can indicated a malfunction if not observed?
What should be done if the operator's system display shows an incorrect sequence during counterweight fitting?
What should be done if the operator's system display shows an incorrect sequence during counterweight fitting?
What must be systematically checked during the examination of hydraulic system components?
What must be systematically checked during the examination of hydraulic system components?
Which action should be taken if issues are identified during the suspension checks?
Which action should be taken if issues are identified during the suspension checks?
Which condition is NOT essential when observing counterweight attachment rams?
Which condition is NOT essential when observing counterweight attachment rams?
Which component should be inspected for condition during the thorough examination of the hydraulic system?
Which component should be inspected for condition during the thorough examination of the hydraulic system?
What should be observed regarding suspension during crane operation setup?
What should be observed regarding suspension during crane operation setup?
What should be checked regarding the boom tip sheave assemblies during inspection?
What should be checked regarding the boom tip sheave assemblies during inspection?
Which method of anchoring wire hoist rope is mentioned as a type that requires the rope to be correctly inserted and locked in place?
Which method of anchoring wire hoist rope is mentioned as a type that requires the rope to be correctly inserted and locked in place?
What is a consequence of damage to a wire rope fitted with a manufactured button fitting close to the fitting?
What is a consequence of damage to a wire rope fitted with a manufactured button fitting close to the fitting?
What is critical to ensure regarding the wire guides of boom tip sheaves?
What is critical to ensure regarding the wire guides of boom tip sheaves?
Why is it important to check for severe damage in boom tip sheave assemblies?
Why is it important to check for severe damage in boom tip sheave assemblies?
What must the wire hoist rope be prepared for after selecting the correct anchor method?
What must the wire hoist rope be prepared for after selecting the correct anchor method?
What action should be taken if a button fitting on the wire rope gets damaged?
What action should be taken if a button fitting on the wire rope gets damaged?
Which of the following statements accurately represents a component of the detachable version of the super lift assembly?
Which of the following statements accurately represents a component of the detachable version of the super lift assembly?
In what scenario would a truck-mounted crane be rated for 360° operation?
In what scenario would a truck-mounted crane be rated for 360° operation?
What is a key characteristic of all-terrain cranes?
What is a key characteristic of all-terrain cranes?
How do city cranes enhance maneuverability in urban areas?
How do city cranes enhance maneuverability in urban areas?
Which of the following features is not typically associated with all-terrain cranes?
Which of the following features is not typically associated with all-terrain cranes?
What operational limitation do truck-mounted cranes experience concerning their duties?
What operational limitation do truck-mounted cranes experience concerning their duties?
What is the purpose of having steering and braking functions in the upper cab of an all-terrain crane?
What is the purpose of having steering and braking functions in the upper cab of an all-terrain crane?
Which feature contributes to the high maneuverability of city cranes?
Which feature contributes to the high maneuverability of city cranes?
What aspect is critical when examining an all-terrain crane?
What aspect is critical when examining an all-terrain crane?
What is the primary advantage of a luffing jib compared to a fixed boom?
What is the primary advantage of a luffing jib compared to a fixed boom?
What is a critical component to examine for damage during a boom inspection?
What is a critical component to examine for damage during a boom inspection?
What range of angles can the fly jib be set to maximize its effectiveness?
What range of angles can the fly jib be set to maximize its effectiveness?
How has modern crane technology evolved in terms of side-supported lifts?
How has modern crane technology evolved in terms of side-supported lifts?
What is a key consideration regarding the area where the crane is positioned for a thorough examination?
What is a key consideration regarding the area where the crane is positioned for a thorough examination?
What kind of construction is primarily associated with most fly jib extensions?
What kind of construction is primarily associated with most fly jib extensions?
Which of the following equipment is considered necessary for ensuring safe access during the examination?
Which of the following equipment is considered necessary for ensuring safe access during the examination?
What should be particularly monitored for damage in the attachment lugs of a fly jib?
What should be particularly monitored for damage in the attachment lugs of a fly jib?
In what scenario is the use of luffing jibs particularly beneficial?
In what scenario is the use of luffing jibs particularly beneficial?
What is the responsibility of the examiner concerning the cleanliness of the crane?
What is the responsibility of the examiner concerning the cleanliness of the crane?
What type of identification should be verified before conducting the examination?
What type of identification should be verified before conducting the examination?
What characteristic is unique to the powered adjustable system of a fly jib?
What characteristic is unique to the powered adjustable system of a fly jib?
Which records should be viewed to assess the crane's operational history?
Which records should be viewed to assess the crane's operational history?
What must be agreed upon beforehand regarding the personnel involved in the examination?
What must be agreed upon beforehand regarding the personnel involved in the examination?
What is critical to ensure about the crane before the examination regarding its prior issues?
What is critical to ensure about the crane before the examination regarding its prior issues?
Which aspect of the crane examination does NOT involve the verification of external features?
Which aspect of the crane examination does NOT involve the verification of external features?
What is a common indication of decreased rope elasticity?
What is a common indication of decreased rope elasticity?
What is a consequence of insufficient clearance between strands and wires in a rope?
What is a consequence of insufficient clearance between strands and wires in a rope?
In rotation-resistant ropes, where are the majority of broken wires typically found?
In rotation-resistant ropes, where are the majority of broken wires typically found?
What usually leads to the removal of a wire rope from service?
What usually leads to the removal of a wire rope from service?
What type of break is indicated by flat ends on broken wires?
What type of break is indicated by flat ends on broken wires?
What inspection area typically shows an accelerated rate of rope wear?
What inspection area typically shows an accelerated rate of rope wear?
Why is the standard for the allowable number of visible broken wires lower in rotation-resistant ropes?
Why is the standard for the allowable number of visible broken wires lower in rotation-resistant ropes?
What effect does prolonged service have on wire ropes?
What effect does prolonged service have on wire ropes?
What is a key characteristic of yard cranes?
What is a key characteristic of yard cranes?
Which system is now commonly used in the tracks of crawler mounted telescopic cranes for easier inspection?
Which system is now commonly used in the tracks of crawler mounted telescopic cranes for easier inspection?
What does the examination of cranes refer to in relation to established standards?
What does the examination of cranes refer to in relation to established standards?
What is an important aspect of yard cranes regarding their operational capabilities?
What is an important aspect of yard cranes regarding their operational capabilities?
In which way should the inspection of crawler mounted telescopic cranes differ from wheeled cranes?
In which way should the inspection of crawler mounted telescopic cranes differ from wheeled cranes?
What is the primary benefit of using rubber on yard cranes?
What is the primary benefit of using rubber on yard cranes?
Which set of standards provides criteria for crane inspections?
Which set of standards provides criteria for crane inspections?
What type of loads are yard cranes typically intended to transport?
What type of loads are yard cranes typically intended to transport?
Study Notes
Load Testing and Examination Procedures
- Test load should be raised between 100 mm and 200 mm above the ground for 10 minutes.
- No over-run or creep is permitted during tests.
- Slewing of the load must occur at the lowest possible speed in both directions to assess lateral load resilience.
- The load should then be slewed to the maximum angle allowed by crane design.
Post-Test Examination
- A comprehensive examination is required after completing the overload test to ensure crane safety and functionality.
Thorough Examination Components
-
Mobile Crane Carrier/Chassis:
- Check the manufacturer's information plate for type, model, serial number, manufacturing year, and manufacturer’s name.
- Ensure all markings comply with legislation and are clear.
-
Lighting Systems:
- Inspect all lights (headlights, sidelights, warning lights) for functionality and condition.
- Verify the security and clarity of windscreen wipers and registration plate.
- Conduct anti-two block alarm tests ensuring safety pins are in place during tests.
Hook Block Specifications
- The hook block must display clear legible information including:
- Safe Working Load (SWL): e.g., 25T.
- Weight of Hook Block: e.g., 360 kg.
- Manufacturer's plate should be accessible for verification.
Hoist Drum Inspection
- Hoist drums should be examined for:
- Secure fastening to the superstructure.
- Absence of visible damage.
- Integrity of hydraulic hoses and connections.
- Proper layering of wire hoist rope.
- Correct rotation and functioning of the hoist brake.
- No unusual sounds during operation.
Wire Rope Examination
- Operators must perform detailed checks regularly, supported by thorough inspections from a Competent Person.
- Various factors for inspection frequency include environmental conditions, type of hoist, and operational history.
Inspection Record Keeping
- Maintain records of all inspections as per ISO 4309, including a running record of crane rope inspections.
- Each inspection will evaluate different aspects of wire rope condition, noting any faults beyond just broken wires.
Assessment and Severity Rating
- Inspectors should assess the severity of deterioration and rate it as a percentage (e.g., 20%, 40%, 60%), or descriptively ('slight', 'medium', 'high', 'very high', 'discard').
- Use visual inspections, measurements, and Magnetic Rope Testing (MRT) for assessments.
Final Evaluations
- The examiner must determine the suitability of the wire rope for continued service, considering its degradation.
- If deterioration is evident, recommend decreasing the duration before the next inspection based on current safety and reliability concerns.
Introduction to Mobile Cranes Diploma
- Essential for professionals involved in mobile crane testing, inspection, and examination.
- Recognized as the industry standard qualification by Lifting Equipment Engineers Association (LEEA).
- Ensures qualified individuals assess cranes’ suitability for continued service post-examination.
Learning Outcomes
- Acquire knowledge to perform thorough examinations of mobile cranes.
- Ability to evaluate cranes' fitness for further service and maintain compliance with necessary conditions.
- Skills to extract and utilize information from various sources for equipment analysis.
Scope of MOB Course
- Covers practical aspects such as working on-site and utilizing examiners' tools.
- Details various types of mobile cranes and examination methods.
- Discusses assessment criteria, preparation methods, competency standards, and load testing protocols.
- Emphasizes thorough examinations of crane carriers, structures, and safety mechanisms, such as Rated Capacity Indicators.
Inspection Protocol
- Complete assessment reports highlighting issues and recommendations, prioritizing safety-critical concerns.
- Immediate notification to equipment owners for severe issues and proper quarantining of out-of-service equipment.
- Establish repair timelines for identified issues and ensure clear communication of findings.
Importance of Professional Standards
- LEEA members are ambassadors for industry standards; maintaining exemplary professional conduct is crucial.
- Continuous Professional Development (CPD) is emphasized for maintaining competencies.
Examiners’ Tools and Equipment
- Essential tools include spirit level, tyre pressure gauge, inclinometer, and load cell.
- Choice of tools varies based on inspection needs.
Boom Tip Sheaves Examination
- Inspect for damage and ensure sheaves operate without bearing play.
- Verify proper installation and securing of rope guides.
- Check for wire rope wear caused by friction with guides.
Wire Rope Anchor Examination
- Ensure correct wire rope anchoring at hook blocks and boom tips.
- Test the anti-two block alarm by raising hook blocks cautiously to activate alarms.
- Confirm the presence and correct placement of all safety pins during inspections.
Hook Block Information
- Each hook block should display clear information, including capacity (e.g., 25T) and weight (e.g., 360kgs).
- Manufacturer’s plate should be inspected for compliance and recorded in examination reports.
Severity Rating and Assessment
- Record findings on broken wires, diameter decrease, corrosion, and other damages.
- Calculate total severity ratings as a percentage to gauge equipment safety for continued service.
- Assess the potential need for more frequent future examinations based on current conditions.
Yard Cranes
- Designed for use in yards where deploying outriggers is inconvenient or impractical.
- May have outriggers and can operate in tight spaces where rough terrain cranes are too large.
- Capable of transporting light loads such as pumps, motors, and valves on a stable rubber platform.
Crawler Mounted Telescopic Cranes
- Mounted on tracks for on-site operations similar to wheeled cranes.
- Easier inspection due to hydraulic drive systems replacing mechanical ones.
- Under-carriage examination requires different methods compared to wheeled cranes.
Types of Examination
- Adheres to LEEA’s COPSULE and global best practices, referencing standards like BS7121 and ISO9927.
- Inspections may require removal of access covers or dismantling parts for complete assessment.
- Post-inspection repairs and documentation of maintenance regimes are essential.
Amending the Intervals of Periodic Thorough Examination
- Maximum intervals for thorough examinations typically range from 6 to 12 months.
- Increased inspection frequency may be warranted due to various conditions:
- Operations near personnel or the public.
- Lifting people in exceptional circumstances.
- Working in extreme environmental conditions (e.g., temperature extremes, sandy or dusty atmospheres).
- Changes in the crane's duty cycle determined by risk assessments.
Automatic Carrier Levelling and Suspension System
- Observe suspension adjustments during setup and conclusion of operations.
- Investigate any anomalies in suspension behavior to ensure safety.
Hydraulics
- Check hydraulic tank oil levels before crane setup and ensure caps are secure.
- Verify filters are accessible and in good condition; listen for irregular sounds from the pump during operation.
- Inspect all hydraulic pipes, hoses, and connections for leaks and wear.
Counterweights
- Fit counterweights according to load charts to maximize boom lengths and radius.
- Monitor counterweight attachment rams to ensure proper deployment and locking.
- Inspect hydraulic rams for full extension, locking capability, and any hydraulic leaks or damages.
Boom Tip Sheaves
- Check for damage and ensure sheaves are functioning smoothly without excessive play.
- Confirm that rope guides are secured and wear from wire rope friction is minimized.
- Significant damage could indicate potential issues with the wire rope itself.
Wire Rope Anchor
- Wire hoist operates via hook block, with the wire attached to the boom tip through a wire rope anchor.
- Correct anchoring technique is crucial, using either button type or wedge and socket type anchors.
- Damaged wire ropes near fittings necessitate returning to the manufacturer for repair rather than simply cutting and reusing the fitting.
Truck Mounted Cranes
- May have reduced operational duties in the front quadrant unless equipped with a 5th jack, which can enable full 360° operation.
All-Terrain Cranes
- Designed for diverse ground conditions, with upper cab functions to steer and stow jacks.
- Equipped with steering wheel and brake pedal for mobility on-site.
- Both steering and braking systems must be inspected for functionality.
City Cranes
- Feature a shorter, multi-section boom, enhancing maneuverability in urban settings.
- Designed with all-wheel steering and a low boom to navigate overhead obstacles.
Yard Cranes
- Optimized for yard use, often without outriggers, yet can have them for added stability.
- Capable of transporting light loads on rubber for ease of movement in confined areas.
Crawler Mounted Telescopic Cranes
- Mounted on tracks for on-site mobility; simpler to inspect due to hydraulic drive systems.
- Inspection proceeds similarly to wheeled cranes, focusing on accessibility and functionality.
Types of Examination
- Based on BS7121-2-1 and BS7121-2-3 standards, alongside ISO9927-1 and ISO9927-5 for crane inspections.
Preparation for a Thorough Examination
- Safety: Position cranes in suitable, secure areas for exam.
- Lighting: Use well-lit conditions; portable lights if inadequate.
- Cleanliness: Cranes must be clean for effective inspections; examiners not responsible for cleaning.
- Access: Ensure safe access, utilizing scaffolding or elevated platforms, with trained personnel.
- Identification: Must have clear ID and rated capacity markings, verified against records and documentation.
- History: Review past reports, defects, and any modifications before examination.
Boom and Fly Jib Examination
Fly jib extensionscan be inspected while stowed, with key checks on boom length and structural integrity.- Examine for damage like distortions and weld cracks, focusing on main cords and lacings.
Fly Jib Angles
- Fly jib angles can vary from 0° to 60°, adjusted manually or with powered systems.
Luffing Jibs
- Used when raising/bowing the main boom is impractical, allowing cranes to reach higher and cover broader areas.
Side-Supported Lifts
- Modern cranes utilize rigging methods to support booms, expanding capacity without the need for additional weights.
Decreased Rope Elasticity
- Triggered by rope diameter reduction, elongation, or insufficient clearance between strands.
- Identified via fine powder from the rope, indicating potential fretting corrosion.
Deterioration of Ropes
- Broken wires generally appear on the external surface for standard ropes while rotation-resistant ropes often exhibit internal breaks.
Broken Wires
- Increased broken wire count typically leads to service removal.
- Entire length of wire ropes must be regularly inspected for breaks, wear, and lubrication.
- Observation of broken wire patterns helps identify structural support issues or fatigue breaks.
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Description
This quiz covers the procedures and requirements for conducting overload tests on cranes. It focuses on specific parameters such as height, load movement, and post-test examinations to ensure compliance with safety standards. Test your understanding of these crucial test protocols.
