Q. Where are these cranes manufactured?
A. The Mantis cranes are manufactured in Donegal and supplied throughout the Ireland and the UK.
Q. What power supply is required to run the cranes?
A. All of the cranes require three phase 380v-400v. The power supply can be either mains electric or a diesel generator.
Q. Can the Cranes be lifted into position using a mobile crane if there is not adequate access to tow the crane onto site?
A. Yes. On most occasions the crane can be towed onto site but where access is limited it is possible to lift the crane either into or out of its working position.
Q. What type of base is required to erect the cranes on?
A. It all depends on your site ground conditions . The most common specified by site engineers is ,Hardcore area with steel plates under each outrigger of the crane or Concrete Slab cast on site and the crane erected on top of it.It is best to get your site engineer to specify what base type is required . All the information required to design a crane base including point loadings etc. is on the spec sheets of each crane model.
Q. Can you have more than one crane working on a site?
A. Yes. We have had upto three cranes working on projects recently in lieu of one large crane. The customer found that with one large crane on site there was a lot of waiting time whereas with the three smaller cranes all trades on site could work independently .
Q. Are the cranes safe in high wind?
A. Yes.When not in use the rotation / slew brake must be released to allow the crane weather vane thus the wind then poses no danger to the crane . All the cranes are fitted with wind speed meters which alert the crane operators of the current wind speed on site while using the crane.
Q. How are the cranes moved from site to site?
A. There are two ways cranes are normally transported . If the crane has high speed road axles fitted it can be towed with your standard articulated / rigid truck however as these high speed axles are expensive most cranes are fitted with site axles which are capable of moving the cranes around site and onto a low loader trailer similar to that used to move excavators etc.
Q. How are the cranes operated?
A. They are fitted with radio remote controls which allow the operator to walk around site as he operates the crane . This eliminates the need for a second person to give signals to the crane operator as he can always be in sight of his load . Should for some reason the remote control fail to work a cable control can connected to the crane until the remote control is repaired .
Q. Is a mobile crane required to erect these cranes?
A. No , these machines erect themselves on site without assistance of any other lifting equipment.
Q. Is there any danger of the operator over loading the crane?
A. When the crane is erected on site the service engineer sets the lifting capacities of the machine and these are not accessed by the crane operator at any stage there after. Unlike other lifting equipment once the overload warning signal is activated the crane hoist and trolley movements are automatically restricted with no over ride option available to the operator.
Q. Can the cranes be erected and dismantled easily on site?
A. Yes the cranes can be erected / dismantled on site easily.