Today I review the 6t Liebherr 100 LC tower crane, the crane was set up with the max jib size of 50 meters, max tower height is 44 meters
The first thing I noticed with this crane is its size. Its only a 6t crane but it looks like a 12t. The large size makes the crane extremely stable. The tower doesn't twist no matter how fast you stop slewing. Deflection is minimal for this size of crane and at 50m it can lift a reasonable 1.6t (unlike other brands that claim it can lift a certain amount and fall short the Liebherr can do what it says)
The hoist speed is pretty good. It will beat just about every other crane on hoist speed that's 8t and below
The wind pushes the jib around real easy so you have to keep an eye on the jib if operating by remote, but it has a great slew brake. The slew motors don't decelerate like other tower cranes. With the Liebherr driving is different, you slew, reach desired slew speed (this happens quite quick, it has good slew motors) and just let the crane glide along. To slow down and stop you just back slew, there's no letting it glide to a stop. It takes a little while to get used to but when you do you don't want to operate anything else. Dogman says stop slew, backslew, jib stops completely.... Its that easy.
Just don't forget to apply the slew brake as soon as possible because even with hardly any breeze the jib will move.
No matter how hard you back slew it doesn't faze this crane, the jib wont bend and shake and the tower wont twist.
The remote is something else. Its huge, way bigger than the big Hetronic remotes you get with Potain cranes. The levers make it feel like you are operating a crane not a remote control car. It even has a thumb button on the hoist lever to give micro hoist speed - just like the cabin controls. Some crane operators will whinge about having to carry around a remote the size of a large infant... Bad luck for them!
The only disappointment on this crane was the cabin. It was small, real small. Room for a seat and the controls and that's it. Access to the cabin is via the roof, you pretty much drop into your little seat.
Believe the hype, 4.5 out of 5
The easiest crane to operate ever!
The Terex CTT 121 is a 5 tonne flat top tower crane.
Most of the ones around Sydney are rentals from Active Crane Hire.
Active also rent out the small Potain cranes, I much prefer the Potain crane. In my experience I have found every Potain to be very reliable, im yet to have work stop because of crane breakdown with this brand. Yet every site im on with a Terex there is usually something going wrong that will put the crane out of action, maybe I've just been unlucky but they just are not as reliable as other brands.
The hoist speed isnt too bad for a 5t crane, with a 5t crane you are never going to get anything super fast. It does 5t max lift in 4 part but you probably want to use it mainly in 2 part with max lift of 2.5t. Changing from 4 to 2 and back is pretty easy as you can see in this previous changing the reeving blog post.
The CTT tower crane range all have a nice slow 1st speed trolley, making small movements easy. If you are walking a slung up load 1st speed trolley may even be a little slow. The trolley doesnt come to a complete sudden stop when you stop the trolley, rather it slows down then stops, this reduces trolley swing, making the crane easier to operate.
Backslew is non existent, it does next to nothing. Not too big a problem on a small crane but the bigger CTT cranes also have this issue and this is where it is more of a problem.
Putting the crane into free slew is easy. Just press a button on the remote and it goes straight into free slew.
When overloaded the trolley cuts out and gives 'trolley error'. You wont be able to use the trolley at all, even trolley in is disabled until you turn off the remote, turn it on and wait for the crane to start up again. Most other tower crane will still allow you to trolley in and hoist down, allowing you to either trolley in to where it is within weight capacity or lower to load back to the ground.
If you are getting a 5t tower crane through Active Hire you only have the choice of the Terex and Potain, go with the potain. Performance wise they are both similar but the Terex reliability lets it down, making it the inferior crane. I also prefer the feel of the Potain, they are just a bit more enjoyable to operate.
The Terex CTT 121 gets 3 out of 5
· Construction of a skyscraper complex in Baku
· Four luffing jib cranes with maximum hook heights of 177 m and 194 m
· Tower Crane Solutions provided support for planning this major project
Biberach / Riss (Germany), 23 June 2016 – Four Liebherr luffing jib cranes are currently operating in Baku (Azerbaijan). Since the beginning of 2015 an architectural landmark has been under construction in the capital of Azerbaijan, the urban development project known as "The Crescent Bay".
The project was designed by South Korean architecture agency "Heerim Architects & Planners" and comprises three parts, the Crescent Hotel, the Crescent City and the Crescent Place. The "La Luna" luxury hotel is to be built on a small artificial island and will reach 166 m up into the air. Based on the half-moon on the flag of Azerbaijan, the hotel will be shaped like a vertical sickle open at the bottom. Next to the luxury hotel, "The Crescent Bay" will be a shopping centre covering an area of around 50,000 m² with an indoor and outdoor area, a modern residential complex with 100 apartments and 20 duplex terraced houses as well as an innovative office building with 38 storeys.
The customer Gilan Holding decided on four Liebherr luffing jib cranes. They are able to climb up the inside of the building thus leaving space on the ground for other construction machinery. They climb through openings in the storey ceilings. That means that the entire climbing system is easily accessible. The resulting cavities are closed again as soon as the cranes have climbed past them.
The first storeys of the building had been completed when the cranes were assembled in April 2015. That meant that all four Liebherr luffing jib cranes were attached by a crawler crane from above to the external frame. Two 280 HC-L 12/24 Litronic and two 542 HC-L 18/36 Litronic are now working on the project. The two 280 HC-L cranes have a maximum hook height of 177 m, a radius of 35 m, a lifting capacity of 11 t at the jib head and a 110 kW heavy-duty hoist gear. The two 542 HC-L cranes have a radius of 50 m, a lifting capacity at the jib head of 9.7 t and a motor capacity of 160 kW to reach a maximum hook height of 194 m. The entire reinforced concrete structure for the hotel will be erected by the four Liebherr cranes.
The Tower Crane Solutions Department at Liebherr provided the building contractor with support for planning the project and during the construction phase, which was one of the reasons for working with Liebherr. The technical expertise and excellent service also played an important role in reaching this decision. The four luffing jib cranes from Liebherr are the first internal-climbing cranes in Azerbaijan.
Liebherr 1000 EC-B 125 Litronic tower crane used for the first time to erect a wind turbine with a hub height of 149 m
• 1000 EC-B erects wind turbine with a hub height of 149m
•Tower crane reaches a final hook height of 164m
•Space-saving assembly on a small hilltop in the middle of the Black Forest
Biberach / Riss (Germany), 13 June 2016 – A Liebherr tower crane recently erected a wind turbine at an altitude of around 800 m in the Prechtaler Schanze Wind Farm in the Black Forest. The 1000 EC-B with its extremely low footprint erected for the first time a wind turbine with a hub height of 149 m on the hills between the towns of Gutach and Mühlenbach. The tower crane had never before been assembled to such a height for wind turbine manufacturer ENERCON – both with and without guying to the wind turbine tower.
ENERCON's Liebherr 1000 EC-B 125 Litronic tower crane erected a new wind turbine in the Prechtaler Schanze Wind Farm in April 2016. With a hub height of 149 m and a blade diameter of 115 m, it is the largest turbine ever to be erected using this crane. With its 31.50 m jib and a hook height of 164 m, the crane was still able to hoist 100 t using four lines – one of the main features of the most powerful Flat-Top crane built by Liebherr which has been enhanced for erecting wind turbines. The maximum load capacity of this crane is 125 t in the six-line version or 100 t in the four-line version.
Logistic benefits for transport and erection at remote sites
Wind turbines in areas with poor wind conditions are not generally used in large wind farms and instead are erected in wooded areas or locations with difficult access. Both these criteria are applied to this site in the southern Black Forest. According to ENERCON, only the 1000 EC-B 125 Litronic could be considered for the small, steep hilltop in Gutach, Mühlenbach in the middle of the forest. The area required for erecting a complete Flat-Top crane is approximately half of the normal standing area of other crane systems. The jib used in this case was very short which is why no additional site clearance work was required for its assembly.
In addition the logistics required to transport the 1000 EC-B 125 Litronic are much less than for comparable crane systems since the various components of the tower crane are supplied in small packages. The jib components of the large crane can be inserted into the tower elements, transported on a truck and assembled on site.
1000 EC-B 125 Litronic Flat-Top crane from ENERCON climbs to record height
First of all the compact Liebherr LR 1200 crawler crane assembled the Flat-Top crane to its initial hook height of 39 m. From this point the tower crane erected the wind turbine and was able to climb up the turbine tower as it rose using its own climbing equipment.
For this job in the southern Black Forest it climbed to a free-standing hook height of 110 m. It was guyed to the wind turbine at a height of 100 m. Using this single guying, the crane climbed to a final hook height of 164 m. Both free-standing and also fully climbed and guyed, these represented hook heights that ENERCON had never achieved before. They were only possible because Liebherr's flagship Flat-Top crane was assembled on the 1000 HC tower system. The monoblock tower sections with system dimensions of 3.40 m x 3.40 m and a length of 5.80 m allow high free-standing erection heights with short erection times. The erection of the wind turbine took around four weeks.
In addition the crane was fitted with an adjustable undercarriage with a support base measuring 18.0 x 18.0 m at the request of ENERCON for the erection of the first turbine. The support arms can be adjusted on this special undercarriage from the 45° position by +/- 5° or +/- 10°. The footprint of the support base is then 20.4 m x 15.2 m. This means that the crane can be moved closer to the object since it requires so little space.
Specialist for wind turbine erection
The locations chosen for wind turbines generally have harsh wind conditions which can adversely affect cranes. One specific benefit of tower cranes is their operational safety in wind speeds of up to 65 km/h.
The infinitely adjustable crane drive units also allow high working speeds to be used. MICROMOVE fine positioning mode enables the concrete rings, nacelles and rotor blades to be positioned and set down with millimetre precision. The very long rotor blades can also be positioned with millimetre accuracy since swinging movements of the attached components are prevented.
The crane driver has a perfect view of what is going on from the cabin. This makes it easier to position the rotor blades precisely and safely using the trolley jib.
Tom Wilson got in touch. He is looking for work in the building industry in NSW as a tower crane operator. 10+ years experience in the offshore game on the big cranes (100t+) email is firstname.lastname@example.org
A green card or white card is officially known as 'general construction induction card' and that us exactly what it is.
It is a requirement to work on a construction site in Australia. In each state the cards may be a bit different, in Victoria I believe its red card, in NSW its a white card but we call it a green card... because it used to be green. But whatever card you can use it all over Australia.
For about $100 you go to a workcover registered training company and they induct you on safety and give you a quiz at the end.
The whole process takes about five hours. Unlike the licences to be a dogman or crane operator which you will fail without study, no one fails the green card.
So if you are a worker from overseas or want to start new in construction the green card is the first step.
It wont get you a job but without it you wont get a job
Raimondi Cranes SpA, established in 1863, has unveiled the new MRT159 topless crane at ANKOMAK 2016 in Istanbul, Turkey.
The Raimondi MRT159, with a 65 meter jib length and a maximum tip load of 1650 kg, boasts a maxium load of 10,000 kg. Deliveries of the new crane will commence in July 2016, following its presentation at this year’s ANKOMAK exhibition.
“The MRT159 adopts the new topless crane range design by Raimondi, but we have integrated new solutions that improve safety and that facilitate ideal installation on the jobsite.
The flexibility of the MRT159 now has more jib configurations available, and a selection of three different winches with respective powers of 30 kW, 37 Kw, and 45 Kw,” explains Eng. Domenico Ciano, Technical Director, Raimondi Cranes. Ciano further points out that the Raimondi MRT159 has more capacity when compared with the Raimondi MRT152, and that the long jib radius increases the tip load by 25 percent, also by comparison.
According to the organizers, ANKOMAK 2016 brings together more than 1,000 brands and expects over 25,000 attendees, making it one of the region’s most relevant “biennial construction industry events.” AKEM Group, the official Turkish-based Raimondi Cranes agent, is onsite at ANKOMARK 2016 with the erected newly-released MRT159 for the duration of the event.
Note the use of a Static Base, perfect for this situation.
Crane Service Inc sent me over a nice animated chart that shows the hand signals. They are the USA hand signals and are very similar to the Australian Crane Hand Signals with a few exceptions - the hoist up slowly and stop. We hoist up slowly by holdoing hands up, fingers pointing to the sky and squeeze fingers and thumb together then open and repeat, the same is done to hoist down slow except fingers are pointed towards ground. Stop is just hand out, palm facing outwards.
When i was working near Wollongong NSW I saw a helicopter lifting and placing structural steel for a cliff top house. For whatever reason it was impractical to use a crane for that job, either ground conditions or access wouldn't allow a mobile crane.
For the Centerpoint Tower in Sydneys CBD a helicopter was used to add and later remove statues on the top of the tower.
Obviously helicopters will never replace cranes (hopefully haha) but they are a good option when access or setup for a crane is not feasible. Changing antennas or bringing up machinery on existing highrise or building towers in remote areas with no road access are just a couple of areas when you may have to look at using a helicopter.
Hand signals are used by the dogman to direct the helicopter to place the load.
I have the self erecting tower crane licence as well as the tower crane licence and from memory the questions in the written exam were mostly identical. The practical test is also pretty much the same consisting of doing the safety checks, identifying crane parts and doing a few lifts with the crane.
So why the different high risk work license?
Good question, back around 2006 WorkCover introduced the self erecting tower crane tower crane ticket, abbreviated on the high risk license as CS. There was a 12 month transition period where people with a tower crane high risk licence (CT) could continue to operate a self erecting tower crane but after that period they would need the CS license.
But why the need for a separate ticket?
Yeah I'm not sure of the logic behind it by WorkCover.
They added the CS to their range of licences but not to long after got rid of the excavator, bobcat, backhoe, dragline and a few other high risk license classes.
Hope that explains everything for you :)
Missed an article?
Type what you are looking for in the search bar or click on the archives