Wednesday, November 24, 2010

Crane Inspector Qualifications


So your company wants to cut cost and it has decided to perform their own inspections and preventive maintenance on their overhead cranes and hoist. Why not right? I mean, your company has a maintenance department. They fix everything else in the plant. They fix the cranes when they are broken. That must mean they are fully able to inspect them as well. Well…. Not if you’re going to go by the rule book, the latest and greatest CMAA standard (Spec 78) which is one of the many specs that is followed by OSHA. OSHA does not know all and they need other committees to help them put together these regulations. CMAA is an association developed by the Crane Manufacturers Service Committee. They are highly knowledgeable committee that is led by the leaders in the industry. According to CMAA there are many qualifications that are required for crane inspectors including physical requirements, work experience, required training, and even local licensing. Let’s take a deeper look at the various requirements so you can understand the burden you will be carrying performing your own inspections.


There are several physical requirements that are set by CMAA for crane inspectors. Some of the more understood qualifications is proficiency in reading and writing English, proficient oral and written communication skills, and be able to distinguish between colors, and have adequate hearing for the job, and physical dexterity, endurance, and strength. There are other qualifications that may not be known like the specifics of the vision qualifications. You are required to have 20/30 minimum in one eye and 20/50 in the other. This is with our without corrective lenses. Your depth perception has to be within normal range, including your field of vision, hand-eye coordination, with no existing conditions of dizziness. You also have to be subject to a safety and drug program. Therefore if your company does not have one in place or it is not that assiduous, then they will need to step up their program even if you only have one employee inspecting your crane. Heights are an additional requirement that gets overlooked probably because it seems so obvious. Your inspector must be comfortable working at heights to access the crane. He has to understand the safety requirements for this, and be able to work safely under adverse physical conditions. It can get extremely hot at the height of the cranes in the plant. So it is immensely important that the inspector understands this and can physically handle the conditions that he or she will be working in. The last physical requirement is fairly understood and most companies adhere to this when hiring maintenance personnel. You can have no physical restrictions of any kind. Meaning… you have to have control of all your body functions at all times, and total emotional stability. I would like to think that companies do not hire people for maintenance personnel outside of such a requirement, but I know that all companies work differently. It is very important for the company to follow these qualifications for the safety of their employees.

Work experience of the inspector is not only something that many companies don’t follow for their maintenance crew but many crane servicing companies do not follow this as well. CMAA requires your inspector to have a minimum of “2,000 field hours of experience related to the maintaining, servicing, repairing, modifying, and functional testing of cranes and associated hoisting equipment”. If you do outsource your crane inspections you should ask your vendor how many hours their inspectors have. They should have well over 2,000 hours if they are inspecting your equipment. On top of these qualifications they should have a good understanding of the various codes and regulations on the overhead cranes set by OSHA, CMAA, and ANSI.

Lastly, we get into the required training that CMAA has set as minimum qualifications to be an inspector. This training however means nothing if any of the prior mentioned are not met. Your employee may have extensive training but if the work experience is not there or the physical requirements cannot be met, then the training of the employee means nothing. You need to have all three in order to be qualified to inspect overhead crane equipment. The training of the inspector is no less arduous than the physical or experience qualifications. It is required for the inspector to have formal training in codes and regulation at Federal, State, and local level. The inspector has to be very discerning with the various codes and regulations set forth by OSHA, CMAA, ANSI, and local committees. They are required to take refresher courses every two years to get acquainted with revisions that change annually. They need to know the difference between “Shall” and “Should”, which can complicate issues greatly if they misinterpret the two. It is essential for the inspector to have trade skills as well which comes from their work experience. The inspector has to have a working knowledge of the products and equipment that they are inspecting. This will help them identify wear patterns, and hear things that may be out of the ordinary. Safety is another important training subject that needs to be familiarized by the inspector as well. This is for their own good to make sure that they work safe, and understand if certain operations of the equipment is unsafe. This would include the astuteness of job-site conduct. Testing of all these training topics is required so the inspector can demonstrate his proficiency of these topics. Certain local governments will require the inspector to be licensed as well, so make sure you check with your local government agencies to ensure if they will need a certification or license to inspect your equipment.



I have discussed several points that CMAA requires inspectors to be qualified in. With all these issues mentioned, please re-think your option to inspect your equipment yourself. Yes, you may save money short term by performing your own inspections. However to do it properly the money spent on your inspector is great, and the responsibility that you are giving yourself far exceeds the few dollars that your saving doing so. If you’re going to go and follow the regulations by doing periodic inspections on your overhead cranes, then seriously think about the burden of doing this on your own. Us crane guys are here to help you, and we want you to make the right choices for your company. In the very least contact your crane vendor and discuss with them the option to perform the periodic inspections on your own.

Sunday, October 24, 2010

Requirements For Inspecting Cranes Three Ton and Below In California

Since I have been working out of California, I have had a lot of questions regarding the inspections and maintenance on equipment that is below three ton capacity. Because the CALOSHA Title 8 Article 100 specifies hoisting equipment over three tons. This article states that all equipment over three ton shall be quarterly inspected and have a load test performed every four years. Because of this many people do not inspect or have any maintenance plan of any kind on their equipment that is below three tons. I was very surprised by this since in reality it made no sense at all. Typically most manufacturing plants main lifting equipment is below three tons. Also this equipment is generally what is most widely used in the plant. So why not have a maintenance and inspection schedule on them?

Recently I was introduced to a letter from CALOSHA that written back in 1993. This letter was regarding proof load testing on cranes less than three tons capacity. It does state that equipment over three tons only requires quadrennial load testing. However is required that all equipment below three tons still be on a maintenance schedule regardless of the rated capacity. Many contractors in the state of California will tell you that you do not need to worry about inspecting your equipment that fall at three tons or less rated capacity. These inspectors and contractors are ill informed.


When you are putting together your inspection program on your overhead lifting equipment in the state of California, make sure that you include all lifting equipment regardless of the rated capacity. Doing your equipment over three tons is not satisfying CALOSHA requirements. Even worse, it is extremely dangerous to not have a maintenance schedule for your lifting equipment. Please let me know if you need help putting together a maintenance schedule. I will gladly help you put together a program that is economic, efficient, safety conscious, and CALOSHA satisfied, all while keeping your production needs in the forefront!

Thursday, September 9, 2010

Huge Crane Fall In Portugal

This is what not to do when rigging a load. Especially a big one like this. You can tell it was extremely top heavy. Never rig from the bottom of the load!!!

Monday, August 9, 2010

Runway Alignment

One of the crane system components that often get overlooked is the runway. Often cranes will have wheel problems and the wheels get changed out not thinking of the actual runway being a potential reason for the original wheel wear. If your crane travels down the runway and is very loud, and you hear lots of cracking, and racking of the crane, you probably have a runway issue. Sometimes the crane runs silently down the runway and you still could have potential crane rail issues.


CMAA specification No. 70-2004 1.4 gives some good guidelines for your runway. It is a must that the runway be “straight, parallel, level and at the same elevation”. If any one of these factors is out of skew it can affect the performance of the crane or cause premature wear. The span of the runway is also a important dimension that if is not within tolerance will cause premature wear as well, and also cause racking of the crane. If your span is less than 50’ as most cranes are, you are only allowed a overall tolerance of 3/16 “. From 50’ to 100’ you are allowed ¼” of tolerance, and if it is over 100’ span than you have up to 3/8”. If you think about that is such a small tolerance over such a distance. You are allowed a ¼” rate of change maximum for every 20’ of runway. When your rail is no straight it is extremely hard on your wheels and brakes when it constantly racks. Your runway elevation should be within 3/8” on each side of runway, and same as crane span when it is compared to each other. Meaning your rail to rail elevation on a crane less than 50’ can only be out by 3/16”, between 50’ and 100’ you’re allowed ¼”, and same with a 100’ you’re allowed 3/8” with a maximum rate of change of ¼” on 20’.

Another important dimension to keep in mind is the space between the rails. The CMAA standards are 1/16”. However the larger the rail and the larger the wheel the greater dimension you will be allowed to get away with. CMAA does not deviate from that dimension. I have seen the dimension larger than this and it has not created any issue with wheel wear or noise during travel because the rail was 160# rail and the wheel had a diameter large enough that it was not affected by the gap.

Konecranes has designed a new and efficient way to perform a runway analysis called Rail Q. From their website page http://www.konecranesamericas.com/news/1/26/ I have learnt several things that would be beneficial for any company with a rail concern to look into Rail Q. Rail Q is much more accurate than previous ways to perform runway analysis. It is also quicker. This would minimize the downtime of your crane during the analysis, and reduced cost of the analysis. Results from such a precise analyisis offer the customer a more cost effective means of repairs to get the runway within tolerance.



Below is an introductory video of the Rail Q survey. Please take a look.



Rail Q Survey

Wednesday, July 7, 2010

Where do I find regulations for Overhead Cranes?



OSHA 1910.179 is the main source for your overhead crane regulations. All other forms of regulations were either written to clarify or expand on the existing OSHA 1910 regulations. These regulations cover definitions of cranes and it’s components, general requirements, cabs, footwalks and ladders, stops, bumpers, rail sweeps, and guards, brakes, electrical equipment, hoisting equipment, warning devices, inspections, testing, maintenance, rope inspection, handling the load, and other general requirements.







CALOSHA Title 8 was written by the California OSHA as a supplement to the OSHA 1910.179 standards. CALOSHA over-rides all OSHA regulations that contradict one another. The California OSHA made these regulations because certain parts of the OSHA 1910.179 they felt were not stringent enough so they wrote a more stringent set of standards to protect the users of this equipment. Obviously this is lawful only in the state of California. If your state has its own OSHA department then you may have similar supplements to OSHA 1910.179. Here you will find similar regulations that are in OSHA. You should look here first when you’re in the State of California. If you don’t find it here then go to OSHA 1910.179. Operation, Testing, Maintenance, and Inspections of overhead cranes are the three big amendments that CALOSHA made to the OSHA regulations.







ASME B30 was written to expand on monorails and under-running cranes which is not specified in OSHA 1910.179. ASME (American Society of Mechanical Engineers) B30 were written for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings under the accreditation by ANSI (American National Standard). ASME B30 covers general construction, installation, inspections, testing, maintenance, operation, and definitions of monorails, under-running cranes, and its components. ASME B30 over-rides OSHA 1910.179. If you are found in violation of an OSHA regulation that contradicts ASME then you do not get fined.








CMAA 70-2004 (Crane Manufacturers Association of America) are specifications for top running bridge and gantry cranes including multiple girder cranes. These specifications were written by crane manufacturers to promote a standardization of cranes and equipment. This does not only spec manufacturing recommendations but also technical procedures. The CMAA Specification number 70-2004 has six main sections.
1. General Specifications
2. Crane Service Classification
3. Structural Design
4. Mechanical Design
5. Electrical Equipment
6. Inquiry Data Sheet and Speeds




You would look into NEC 610.31, and 430.101 through 430.113 to get the specifications for electrical disconnect regulations. You could also look into NFPA 70E for De-contactors for maintenance purposes which would include hazard analysis, voltage testing and auxiliary disconnects, mechanical interlocks, flash boundaries, and PPE.


If you have any questions or need further assistance please let me know and I will do my best to provide you with the information that you request. I hope this has been helpful.

Tuesday, June 29, 2010

Gantry Crane Collapse

I found this video a long time ago. I never posted it because like the Harland and Wolff accident I really wanted more information. I researched online and could not fine anything on this following accident. This accident is of a gantry crane falling down in the winter outside and it almost hits a nearby person in a car. I have no idea where it is, nor do I know why it happened. If anyone knows please fill me in and I will add it to my posting. I think these videos of accidents are very valuable in learning what can happen if the operator is not trained or the equipment is not periodically inspected and preventive maintenance is not performed when it needs to be. This guy barely survived with his life. It appears to me the crane fell because of lateral force on the legs of the gantry. Now it is possible that this was caused by a load swing, or a component on the crane giving out. It is hard to tell without some kind of information. The crane does not even come into the screen until it has already fallen. It is very hard to tell what took place. It is however a good video clip of a gantry crane accident so I thought it should definitely be on my blog. If you have any ideas about this as well, please share them with me. I will post any corrections to this video as I find them. I just wanted to get it up online while it was still available.

Wednesday, June 16, 2010

Harland & Wolff Accident

I wanted to post this accident in the past but I never did because I wanted more information. Did anyone die? How did it happen? It is often hard to find out those answers because private companies do not have to report an accident if no one gets hurt. Unless someone is killed it is easy to keep the information from getting out to the public. This occurred at Harland & Wolff in Belfast on April 4th 2007. No one was killed in this accident. This is the same shipyard where the Titanic was built. There are 5 cranes in the shipyard. They have two Goliath cranes. One nicknamed Goliath and the other Samson. Goliath was built first in 1969, Samson was built in 1974. They span 140 meters (460ft) with a lifting height of 70 meters (230ft). Each has a capacity of 840 metric tons, or 926 short tons. So combined they can pick up 1600 metric tons or 1852 short tons. They are complete monsters. The crane that fell was a Henson 60 metric tons (66 short tons) crane. It stood 25 meters (82ft). The filming was taking from atop of the neighboring Henson crane. It is said that when the crane fell it came only within a few feet of the neighboring crane. I would think that a shipyard as big as this one would have an anti-collision system installed that would prevent such a collision. As the tower crane comes into the path of the gantry crane they should make it so that it automatically stops the gantry from moving in the direction of the tower crane. Since no one was killed then I imagine then that the tower crane was empty. This would mean to me that someone parked the crane in that position. Why would they park it in the path of the crane? There should also be a safety mechanism that does not allow for shutdown of the crane if it is in the path of the Gantry. In this age of technology there is no need to not have it. The price to install one on a crane would be minimal.