Posted By peter gotch Oliver, If the jib were to be locked in position it is liable to adversely affected when the wind blows up. Tower cranes are designed to be free to turn when not in use. Peter

Posted By Ken Urquhart Oliver: Also be aware of intrusion of or trespass of "Air Space" It is a while since I was involved in such situations in the UK but there is case law, (sorry I just can't currently give you the references) on infringing air space over other peoples properties. It is possible for owner/occupiers and even tenants jointly with landlords and fellow tenants to seek injunctions to stop you slewing a tower crane over there property/air space, whether in service or out of service. I have been involved in the past in the UK in negotiating Wayleaves with local residents to "Buy the right to oversail" (Amazing how peoples perception of and opinion about RISK changes when Money is discussed) Speak to the Trade Associations for Crane Hire and Tower Crane Hire etc. The CPA, Contractors Plant Association might be able to help. Look also at the British Standards for Cranes and Tower cranes regarding Luffing Jib TC's as opposed to static horizontal boom jib ones. Also look at the Crane Designers and Manufacturers Handbooks/Operating manual details for conditions of operation, in and out of service. Either your own in house Plant Departnment or the Hire Company should be able to let you see these documents. Hope that this is of some interst and help, sorry that time precludes me at the moment from finding and digging out more detailed and probably more updated/current interpretation on these matters. Regards. ken urquhart

Posted By Andrew Townsend Another way round the problem is to look at a crane type called a "goose neck" that is useful in these situations. They have become quite popular in town and cities. You would have to check with your crane supplier to see if this crane would meet your specification. Hope this helps Andrew