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Bridge crane inspection and maintenance ensure your bridge crane safety

08 Jun, 2017

Bridge crane accidents may injury your safety. Around 70 people died from Bridge crane accidents or related accidents, among which construction laborers, electricians and welders in the related Bridge crane accidents are most likely to be killed, according to the Occupational Safety and Health Administration( OSHA). In order to ensure your safety and prevent your overhead bridge crane from accidents, the Crane Safety and Inspection Requirements should be confirmed with.H2wHenan Dongqi Machinery Co., Ltd

Overhead bridge and gantry cranes are the most commonly used material handling equipment used for lifting loads at various industrial sites. bridge cranes are the lifting equipment traveling on an overhead runways structure, working with a movable or fixed hoisting mechanism to handle loads. Whereas, the overhead gantry crane is a crane supported by crane legs which are running on fixed rails or other runway. The safety of the bridge cranes and gantry cranes can be grouped together for they share similarities on traveling and hoisting.H2wHenan Dongqi Machinery Co., Ltd

Bridge crane inspection and maintenance ensure your bridge crane safetyH2wHenan Dongqi Machinery Co., Ltd

Bridge crane inspection and maintenance ensure your bridge crane safety| Dongqi bridge craneH2wHenan Dongqi Machinery Co., Ltd

Crane selection and installation

The selection of material handling equipment such as overhead cranes, gantry crane, electric hoists and ancillary equipment such as hooks, slings, etc. must meet the designing and installation standards and requirements. The lifting equipment has to have sufficient rated capacity for the intended load, and the load should not exceed the lowest load rating markings. Each crane component or part should be marked clearly with the rated capacity. A thorough crane inspection including load testing to a bridge crane and crane supporting structure should be conducted by a professional engineer or manufacturer.H2wHenan Dongqi Machinery Co., Ltd

General daily bridge crane inspection requirements

Generally, the following items has to be inspected daily, such as:H2wHenan Dongqi Machinery Co., Ltd

crane out of order tagTagged bridge crane or electric hoist, check the bridge crane or electric hoist is tagged with an out-of-order sign.H2wHenan Dongqi Machinery Co., Ltd

 

crane control devicesControl devices,check all motions of control devices such as Up/Down/Fwd/Rev.H2wHenan Dongqi Machinery Co., Ltd

 

crane brakesBrakes, check to make sure 1) all motions do not have excessive drift and 2) stopping distance are normal (about 10% of high speed travel).H2wHenan Dongqi Machinery Co., Ltd

 

crane hookHook, check hook for damage, cracks, nicks, gouges, deformity of the throat opening, wear on saddle or load bearing point and twist.H2wHenan Dongqi Machinery Co., Ltd

 

crane hook latchHook latch, check whether the hook latch work properly or not.H2wHenan Dongqi Machinery Co., Ltd

 H2wHenan Dongqi Machinery Co., Ltd

 H2wHenan Dongqi Machinery Co., Ltd

Wire ropeH2wHenan Dongqi Machinery Co., Ltd

H2wHenan Dongqi Machinery Co., Ltd
1) Wire rope that have to be checked in the following respects:H2wHenan Dongqi Machinery Co., Ltd

broken crane wire ropeBroken wires, 10 wires in one rope lay, and 5 wires in on strand in one rope lay,H2wHenan Dongqi Machinery Co., Ltd

 

excessive crane wire ropeExcessive wear, loss of 1/3 of the rope diameters of individual wires.H2wHenan Dongqi Machinery Co., Ltd

 

kinks of crane wire KinksH2wHenan Dongqi Machinery Co., Ltd

 

crushing of crane wire rope CrushingH2wHenan Dongqi Machinery Co., Ltd

 

stretching of crane wire rope StretchingH2wHenan Dongqi Machinery Co., Ltd

 

bird-caging of crane wire rope BirdcagingH2wHenan Dongqi Machinery Co., Ltd

 

 H2wHenan Dongqi Machinery Co., Ltd

2) How to measure the wire rope:H2wHenan Dongqi Machinery Co., Ltd

crane wire rope inspectionH2wHenan Dongqi Machinery Co., Ltd

a) The components of a wire rope has a small but definite size tolerance. It is to say, the rope itself has a diameter which is equal to the nominal or catalog size at least. b) Any wire rope or red tag should be replaced if any of the mentioned conditions observed.H2wHenan Dongqi Machinery Co., Ltd

 

crane load chainLoad chain, check the load chain and the end connections for excessive wear, twist, distorted links or stretch, beyond the recommendations of the manufacturer.H2wHenan Dongqi Machinery Co., Ltd

 

crane reevingReeving, make sure the wire rope or load chain is properly reeved with no twists and make sure the wire rope is seated in drum grooves properly.H2wHenan Dongqi Machinery Co., Ltd

H2wHenan Dongqi Machinery Co., Ltd
crane limit switchLimit switches, make sure the upper limit device can stop the lifting hoist properly without striking any part of the hoist or crane.H2wHenan Dongqi Machinery Co., Ltd

 

crane oil leakageOil leakage, check if there is sign of oil leakage on the crane or on the beneath floor.H2wHenan Dongqi Machinery Co., Ltd

 

crane unsual noise inspectionUnusual noises , if the bridge crane or electric hoist mechanism makes unusual sounds like squealing, grinding, or unusual vibration, inspection should be conducted.H2wHenan Dongqi Machinery Co., Ltd

 

Warning and safety label and warning devicesWarning and safety label and warning devices, to make sure the warning and other safety labels are placed in the right position without missing and make sure the audible and visual warning devices are workable.H2wHenan Dongqi Machinery Co., Ltd

 

Periodic inspection

A periodicbridge crane inspection is a detailed inspection to each component to make sure the working conditions, which is conducted as often as quarterly according to the loading services, application environment and other factors determined by a specialist or according to related standards or requirements, such as, the periodic inspection chart of OSHA:H2wHenan Dongqi Machinery Co., Ltd

ASME B 30.2 H2wHenan Dongqi Machinery Co., Ltd
Service Class
Number of Shifts Operated per Day
1 Shift 2 Shifts 3 Shifts
Frequency of Inspection
Normal Annual Annual Annual
Heavy Annual Semi-annual to annual Semi-annual
Severe Quarterly Quarterly Quarterly

crane structure memberStructural member. Check the crane structural components such as girder, end trucks, foot walks, trap doors, ladder, hand rails, trolley frame, and cab, et., for deformed, cracked, corroded or unsecured members. And to make sure the right type of fire extinguisher is equipped at cab, etc.H2wHenan Dongqi Machinery Co., Ltd

 

crane connection pointsConnection points. Check connection point for loose or broken bolts or rivets, and for cracked or insufficient welds.H2wHenan Dongqi Machinery Co., Ltd

 

crane sheave and drumSheaves and drums. Check for worn groove lands, sharp edges and cracks.H2wHenan Dongqi Machinery Co., Ltd
Shafts, Axles, wheels, couplings. Check for worn cracked bent or broken parts, loose or missing hardware.H2wHenan Dongqi Machinery Co., Ltd
Brakes. Check for proper function of electric control brakes and excessive wear and proper adjustment on brake system parts, linings, pawls and ratchets.H2wHenan Dongqi Machinery Co., Ltd

 

crane indicators and gaugesIndicators, gauges. Check for load, wind, and other indicators over their full range, re-calibrate as required.H2wHenan Dongqi Machinery Co., Ltd

 H2wHenan Dongqi Machinery Co., Ltd

 

crane stransmissionTransmissions. Check for excessive wear of chain drive sprockets and excessive chain stretch, gear teeth wear and proper lubrication.H2wHenan Dongqi Machinery Co., Ltd

 H2wHenan Dongqi Machinery Co., Ltd

 

crane electric componentsElectric components. H2wHenan Dongqi Machinery Co., Ltd
Check all electric apparatus for pitting or controller contactor, limit switches, pushbutton stations, motor slip rings, brushes, resistors. Check for any loose wire connections for damaged wiring, overheating, and make sure door or cover closed properly.H2wHenan Dongqi Machinery Co., Ltd

 

crane covers and guardsCovers and guards. Make sure all the covers/ guards are in place, secure and undamaged.H2wHenan Dongqi Machinery Co., Ltd

 

crane bumpersBumpersH2wHenan Dongqi Machinery Co., Ltd

 

crane end stopEnd stopsH2wHenan Dongqi Machinery Co., Ltd

 

crane trolley and runway railTrolley and runway rail. Check rails and fastening devices for looseness, gaps, misalignment, wear.H2wHenan Dongqi Machinery Co., Ltd

 

crane runway structureRunway structure. Check runway structure for proper anchor, loose bolted connections, and corrosion, cracked or deformed members.H2wHenan Dongqi Machinery Co., Ltd

 

crane conductor systemConductor system. Check for alignment, fastening, splices, power feeds, and conductor shoes for wear.H2wHenan Dongqi Machinery Co., Ltd

 

crane below hook devicesBelow the hook devices. Check for cracks or structural damage, and check mechanical components for wear, alignment, and missing/loose hardware. Check all guards are in place and safe.H2wHenan Dongqi Machinery Co., Ltd

 

 H2wHenan Dongqi Machinery Co., Ltd

Bridge crane operational safety

1) Before liftingH2wHenan Dongqi Machinery Co., Ltd

overhead crane before lifting inspectionOnly trained bridge crane operators are allowed to operate the bridge crane.H2wHenan Dongqi Machinery Co., Ltd
Focus on your bridge crane operating work.H2wHenan Dongqi Machinery Co., Ltd
Test operation of lifting and controls at the beginning of each shift.H2wHenan Dongqi Machinery Co., Ltd

 H2wHenan Dongqi Machinery Co., Ltd

 

overhead crane overload is not allowedNo bridge bridge crane or electric hoist overload. Make sure the combined weight of lifting devices and the loads do not exceed the rated lifting capacity of the bridge crane or electric hoist.H2wHenan Dongqi Machinery Co., Ltd

 

H2wHenan Dongqi Machinery Co., Ltd
overhead crane safetyMake sure loads is balanced and stable. Make a trial lift of a few inches. H2wHenan Dongqi Machinery Co., Ltd
Don’t lift dangerous loads unless the lifting devices are specially designed for the loads.H2wHenan Dongqi Machinery Co., Ltd

 H2wHenan Dongqi Machinery Co., Ltd

 

overhead crane wire rope safetyMake sure the hoist rope or chain is in the right condition for lifting with no twist, knots and kinks.H2wHenan Dongqi Machinery Co., Ltd

 H2wHenan Dongqi Machinery Co., Ltd

 

2) Moving a load H2wHenan Dongqi Machinery Co., Ltd
H2wHenan Dongqi Machinery Co., Ltd
Follow the instruction only from the designated staff.H2wHenan Dongqi Machinery Co., Ltd

no ride on overhead craneNo ride on the bridge crane is allowed. H2wHenan Dongqi Machinery Co., Ltd
Do not life higher than the necessary to avoid obstructions.H2wHenan Dongqi Machinery Co., Ltd
Make sure the loads have no contact with other objects.H2wHenan Dongqi Machinery Co., Ltd

 

overhead crane lifting safetyMake sure the load traveling path is clear from obstructions. H2wHenan Dongqi Machinery Co., Ltd
Make sure people stay out from under the load and keep a distance from the load. H2wHenan Dongqi Machinery Co., Ltd
Avoid sudden starts and stops. Shock loading may stress the lifting system beyond its capacity.H2wHenan Dongqi Machinery Co., Ltd

 

make your loads balancedMake sure the load from swing. Stay clear while moving load and use a rod to push or a tag line to pull the load. H2wHenan Dongqi Machinery Co., Ltd
Make sure to always lower load to ground and make loads stable during traveling. H2wHenan Dongqi Machinery Co., Ltd
Make sure the lifter is stored properly when finished using. Lifter is heavy and big which may cause injury if not properly stored.H2wHenan Dongqi Machinery Co., Ltd

 H2wHenan Dongqi Machinery Co., Ltd

Qualification requirements to crane inspector

Crane inspector is a designated person who is engaged in the testing, examination and/ or certification of cranes, such as, top travelling and under running bridge and gantry type, single or double girder overhead traveling cranes and related hoisting equipment, etc.H2wHenan Dongqi Machinery Co., Ltd

Physical qualification requirements to crane inspector

  • Vision of at least 20/30 in one eye and 20/50 in the other with or without correction.
  • Normal depth perception, field of vision, hand eye coordination, and on tendencies to dizziness or similar conditions.
  • No physical restrictions, not be subject to seizures or loss of physical control, or emotional instability which could cause a hazard to the technician or others.
  • Good hearing, without hear aid, capable of a specific task.
  • Be capable of working at extended heights in a safe manner under varying environmental and adverse physical conditions.
  • Be capable of reading and writing in English, oral and written communication skills.
  • Should be able to distinguish colors if color differentiation is needed for the work.

Training for bridge crane inspector

  • The bridge crane inspector should have received the formal training in the following areas:
  • Safety and design codes related to cranes,
  • State and local codes and regulations,
  • Safety operation practices of cranes,
  • Report writing and documentation,
  • Communication skills.
  • Other additional training such as, trade skills, products, safety, tolls and equipment, job-site conduct, etc.
  • Testing should be conducted.
  • Certification / Licensing

Overhead bridge crane and gantry crane Hand signals

overhead crane hand signal

 Bridge crane inspection and crane maintenance ensures your bridge crane safety to prevent bridge crane accident. Bridge crane engineers tips for you to inspect and maintain your bridge crane. High bridge crane safety, No bridge crane accident. contact us to learn more about bridge crane. H2wHenan Dongqi Machinery Co., Ltd

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