Send comments via email Some tower cranes do place the trolley on the end of the boom. The short-term Wolfe Crane may illustrate this point. Go to the operator's manual. Samuel Evans

Eric_L I am not a tower crane expert, but a manufacturer in this industry. My opinion is that when a manufacturer recommends a specific action, it is the result of hours of risk analysis, research and testing of different solutions. Follow it. I know that many of you will have a lot of experience, and some things "feel" incorrect to you, but for any particular model of any particular brand, their manufacturer knows more. Follow their suggestions, and if you can’t do this for some reason, please contact them before using other solutions.

Send comments via email. Hello, editor, thank you for your hard work! Regarding your request for an answer to the following question: One of our readers received a question about the parking of a discontinued tower crane trolley overnight... My answer in short: as stated by the manufacturer , And then the site promotion plan. Detailed description:-Before installing the crane, everything has been considered, including the manufacturer’s deactivation radius for the A-type tower crane or the flat-top tower crane/hammer head contained in the trolley, which can be set as required The location of the trolley is on any adjacent structures being constructed and surrounding temporary works, such as access to the top/stairs, etc. The trolley needs to stay in the open space around the crane. The crane can rotate 360 ​​degrees, including the swing and headroom required by best practices and standards like LEEA and LOLER98 and BS7121. In most cases, it needs to be kept 500mm or larger from obstacles. gap. Training center: Most training centers and instructors specify that the cranes that are out of service need to reach the maximum height and minimum radius, but there is one! The crane cannot be kept at the maximum height because this will stick the crane to the stop switch and the crane will not move in the morning, so on the old crane, if this is not done digitally by a computer, the crane operator actually keeps ascending until it stops , And then it will lift down 100mm-to stop the limit switch. When it comes to trolleys, an experienced operator will go in until it stops, and then the trolley will be 4 or 5 meters away. This is to keep the hook block away from the mast/tower section of the tower crane, and in some models. If the crane cab is close to the nacelle, strong wind will cause the hook to swing, thereby damaging all broken glass in the nacelle, but it is also limited to certain crane models, but most new tower cranes are designed with this in mind . Some cranes may leave a trolley weight to balance the rear weight/ballast of the crane, or leave the trolley outside to help balance the top of the crane, but this only applies to very long jibs such as 70m or 100m jibs The manufacturer’s approach will be the weight of a trolley with a specific design weight for the designated parking radius. Generally, the closer to the nacelle/tower, the heavier the weight, the farther the trolley’s radius, the smaller the weight on the trolley. I hope this makes sense, if not, I'm glad to have any other questions that can help! Regards Ricardo...

Send comments via email in response to questions about where the trolley stopped when the crane was out of service. I have been driving cranes for more than 30 years, most of which are on Wolff cranes. I usually park the trolley close to the tower. Then I was told to park it at the other end of the cantilever, but did not explain why it would not affect the free rotation of the crane. As for parking it in the middle, if it was a MOD site, the driver might be told that it was parked at Bob L radius

Send comments via email. If the tower crane is a smaller self-supporting crane like Igo 50, the trolley needs to be retracted to the first fold/hinge of the boom in case there is a problem in the pre-start inspection and needs to be folded Cranes are used for maintenance. B Kebin=

Charmer good comment Mick, how are you friend? How is Nottingham? Dave Wolverhampton.

Send comments via email. I have been operating tower cranes for 48 years, and the saddle boom is usually parked on the heel end of the boom with the trolley. When Wolff Kraan produced longer booms, the crane became heavier due to the increased weight of the rear ballast, so the trolley was stopped at the end for better balance. As long as the chain is removed, this shouldn't be a problem. If you have more questions, please let me know. Kind regards Mikhat

Charmer's last e-mailed comment about the manufacturer's guide. Do you know these cranes and their models and configurations? Because I can and can make wise comments. The two cranes mentioned are Wolffkran model 6031fl, 60m boom and 50m boom, and the MOD project is Wolffkran 7532fl model with 65, 70 and 75m booms. Believe me, these cranes need to be free to turn the wind vane, which is more than just manufacturing. The business said rubbish, it is actually the key to safety under the condition of out-of-service. Know your facts before you feel free to comment. False or ignorant statements can lead to unspeakable confusion.

Email comment that the crane you are talking about is a manufacturing guide/instruction! They seem to think that when the crane turns freely and there is wind, it is easier to move the crane! Basically it's rubbish what they want, think about sail! No matter which direction it faces, it will blow like a flag, so it will move! Some companies also insist on doing this. Allen

The comments in Charmer’s email are the most accurate. I have worked for this company for many years. I don’t quite understand. Do not agree?

Send comments via email The crane manufacturer will specify the deactivation conditions under which the crane must be placed-in this case, Wolfkran stated that the trolley must be placed at the maximum radius to help the crane balance to achieve the wind vane. However, in some cases, namely the boundary of the field or the right of sailing, the empty arm can be sailed, but not. Wolffkran will allow parking spaces with a shorter radius, but this must first be obtained from Wolffkran. The two cranes mentioned above are located on a site sufficient to achieve the maximum radius. The MOD project is a nuclear-licensed project, so a physical blue line is placed around the permitted operating area. The deactivation condition does not allow the hook block to be outside this boundary, so The trolleys are allowed to be placed at different radii on each crane while remaining within the boundaries of the blue line. Berkshire agreed to withhold name

Michael Brown I let HTC notice this in 2004. It is stated in the WollfKran manual to park the trolley there because it will increase the influence of the weather context. That is, when the crane stops running and rotates freely for additional wind resistance, the trolley and block collector make it easier for the crane to rotate with the wind. As far as I know, it is not in any other manufacturer's manual. Others prefer that the trolley is under the trolley rope motor or farther away. In this world with more trolley cameras, the trolleys are placed below the charging point, no matter where they are on the boom.

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