NEWS - Kranex


Apart from the first attempts to rig 60 m hub height wind turbines by using telescopic 300 toner (Demag AC 300, for instance), at the beginning of this century, most of the leading role in the installation of wind farms in Europe, ran on the side of the large lattice boom cranes on crawlers.

The inflection point of this trend was led by two telescopic cranes of great capacity: the Terex Demag AC 500-2 and the Liebherr LTM 1500-8.1. The first one, was due to its SSL sideways Superlift system and its luffing fly jib and the second one, due to its 84 m telescopic boom system.

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What the designers of the Demag CC 2800 did not guess in 1998, is that it would undoubtedly be the most successful lattice boom model of the brand, with about 400 units sold. The secret of its success, has surely been its surprising versatility.

The modular boom system of this 600 toner has allowed a large number of combinations, starting from a 84 m heavy duty SH boom and a luffing fly jib of additional 84 m. Thanks to the mast of the Superlift system, a 138 m length SSL / LSL lighter configuration and a 84 + 84 m SWSL (boom + luffer) configuration can be achieved, reaching radii up to 140 m and heights up to 173 m, under hook. Read more


 Would you like a challenge?. What crane would you have used to mount each wind turbine model during the first decade of this century? Here’s my proposal (*):  Read more


When the first AC 205 all terrain mobile crane unit from the Demag factory in Wallerscheid (Germany), came out in 1994, there was probably no reason to assume that the model would hardly change over the next two decades. It was revolutionary indeed, as it was the very first time that fifty meters length main boom was mounted on a just four axles chassis and its additional seventeen meters boom extension, would allow to work up to 67 meters height under hook. Until then, only higher capacity models, such as the AC 615, could aspire to such a privilege.

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Should it be mandatory to get qualifications for operating mobile cranes anywhere?. In fact it should be… at least advisable. In most of occidental countries, the operator needs recognized qualifications to drive and operate a mobile crane. Similar to the mobile crane NVQ (National Vocational Qualification) in the UK, it is likely to find an equivalent assessment all over the world, but in some countries this code of practice is relatively new. In Spain for example, the official requirement to pass an exam (mobile crane test questions and answers) to get your mobile crane nvq (carnet de gruísta) is less than ten years old! Read more


Going further into the safety standards to follow in the workplace by operators and users of mobile cranes, one might consider a few simple rules that in most cases ensure safe operation without risk to the integrity of individuals near the site of operation. Such simple concepts like: determination of stability of a mobile crane, ground bearing pressure calculation, exclusion zone, earthing/ electrical grounding, wind speed, load test procedure, useful life of the mobile crane, wire rope working conditions, net capacity after “load weight” deduction, etc., are crucial facts to take into consideration even before driving the crane to the job site. Read more


Apart from being very popular in online social media like Facebook, Youtube or Twitter, mobile cranes are quite present in the society and in daily life, in terms of merchandising. The scale models of cranes in all the sizes and formats were initially a great hobby for craftsmen & metalworkers who used to build any model on the market, with amazing accuracy at a much smaller dimensions. Today Lego, a brand of famous toys, is a pioneer in representing scale mobile cranes that can be assembled by anyone. That fact is evidenced by the extensive presence of Lego mobile crane videos & pics on Youtube, with a detailed explanation (training videos) of their rigging and operation. Furthermore, there is a wide variety of mobile crane online games and toys that can be purchased on eBay, for example. Read more


When I have surfed the internet, I have just missed in relevant information on mobile cranes and apart from slight exceptions, is difficult to find details about commonly accepted definitions, advantages of any type of mobile crane and how they work, or even about the mobile cranes usage. You can visit Youtube and download either mobile or tower crane training videos, mobile crane pics and vectors and free images, etc., but it’s undoubtedly more difficult to find how the telescopic boom works, which is the current usage of every type of crane, the advantages of compact dimensions and how can they be placed at the job site, and so on. The forums are perhaps too specific, thus it is necessary to count with a differently structured site by including light connotations to the glossary of terms relating to the components and type of mobile cranes (chassis, superstructure, telescopic/ lattice boom, all/ rough terrain, portal, rtg, etc .). Read more


Is there anyone who still doubts the influence today of a specific forum, a social network like Facebook or even youtube, when searching for news and data about mobile cranes, online?

Until the early 2000s, manufacturers of mobile cranes used to distribute product catalogues with capacity charts and user manuals on paper, usually of high quality.

Thereafter, internet came to their aid, by making possible those catalogues were downloaded and distributed in digital versions and different formats (pdf, jpg, ppt, png, etc.) as well as the widespread use of all kind of data: news, images, pictures, photos and videos of mobile cranes, throughout the web and forums.

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Continuing with our previous post, we would like to focus now on the inspection checklist of mobile cranes, and the lift plan template and procedures to prevent accidents at the job site. Careful exam and rigorous inspection checklist of mobile cranes key aspects, as   certification and qualification of the operator and the validity of his license to drive, the mobile crane specifications and net lifting capacity, are as important as the follow-up of the mobile cranes inspection guidelines issued by the American OSHA or the British HSE.

In fact, to meet the formal aspects of safety regulations (Osha, HSE, etc.) for working with mobile cranes, is the first step to avoid unnecessary troubles. Save costs to avoid       regulations compliance, is self-deception. Licenses, certifications, qualifications, supplier specifications and user manuals in the local language, must also be part of the mobile crane inspection checklist, periodically. To check and confirm the regulations are               respected, before placing the equipment into operation (market), is a must and then it should be constantly done, over the mobile crane entire lifetime. You can meet all the   previous conditions and get even the best lift plan template and the best lifting procedure and every piece of machinery under license, but if the crane has not passed every         inspection, the Health and Safety Officer could impede its access to the job site. Read more