MikeDennis Posted September 30, 2011 Share Posted September 30, 2011 Hi all, I want to rig two Martin Roboscans in two areas of our top deck bar at the Thekla. There are steel girders running across the ceiling, which is roughly 8' high, and I am hoping I can hang them from these. Only problem is I can't use G clamps because the fixable area is about 3 inches wide and only half an inch deep. It's a flat surface. Can anyone tell me what kind of rigging equipment/clamp I'm going to need for this? Thanks! Link to comment Share on other sites More sharing options...
savage1 Posted September 30, 2011 Share Posted September 30, 2011 something like this would work http://www.doughty-engineering.co.uk/cgi-bin/trolleyed_public.cgi?action=showprod_T29860 Link to comment Share on other sites More sharing options...
MikeDennis Posted September 30, 2011 Author Share Posted September 30, 2011 something like this would work http://www.doughty-e...showprod_T29860 Excellent! Thankyou :) Link to comment Share on other sites More sharing options...
timsabre Posted September 30, 2011 Share Posted September 30, 2011 If this is staying there for a while (if you don't have to rig/derig frequently) unistrut with beam clamps would hold the scans closer to the roof http://www.cablesystems.co.uk/unistrut-beam-clamps.php Link to comment Share on other sites More sharing options...
kerry davies Posted October 1, 2011 Share Posted October 1, 2011 Knowing the Thekla your main difficulty is achieving some sort of clearance after rigging fixings and you may have to go down the drill and bolt route. Before getting girder clamps and setting out to hang them have a look at where they won't be within reach of sticky fingers and pints of cider. Link to comment Share on other sites More sharing options...
MikeDennis Posted October 2, 2011 Author Share Posted October 2, 2011 Yeah, I was given the brief of getting some "tamper-proof" lighting which, when they're fitted to a ceiling inches above pissed people's heads, I found fairly impossible. Settled for getting something that would do the job and now have the tricky task of finding two spots where people are least likely to be able to get to them! Link to comment Share on other sites More sharing options...
AndyJones Posted October 2, 2011 Share Posted October 2, 2011 Could you put the fixings on top of the beam and then hang from that, it would give you aome more clearence? Link to comment Share on other sites More sharing options...
Seano Posted October 2, 2011 Share Posted October 2, 2011 Knowing the Thekla your main difficulty is achieving some sort of clearance after rigging fixings and you may have to go down the drill and bolt route.. .. fitted to a ceiling inches above pissed people's heads .. Uh-oh. It looks like those nice Doughty clamps might not be sufficiently tamper-proof for this gig then. I'd be very reluctant to drill holes in structural beams personally. You could achieve much the same effect with a bit of custom bracketry (which could be as simple as a bit of mild steel bar with three holes in it) and some Lindapter flange clamps. If you have a friendly local steel fabricator you can take a BOFP* drawing to, you could perhaps design a bracket to stand off slightly to one side of the beam and gain a little more height. Edit to clarify archaic terminology:* - Back of fag packet. Link to comment Share on other sites More sharing options...
Sam Jelfs Posted October 5, 2011 Share Posted October 5, 2011 I know a very good engineer in Cardiff who I can put you in touch with if you need to go down that route - I would suggest that it would be possible to make something similar to the doughty clamps, but rather than have handles on them, just put hex heads on them and use a ratchet and socket to adjust / fix them, that way even if people can reach them, without a socket-set or spanner there isn't much they can do. Link to comment Share on other sites More sharing options...
kerry davies Posted October 5, 2011 Share Posted October 5, 2011 Personally I don't think it is the manner of fixing, it isn't structural AFIK Seano but superstructure we are talking about. Mike is basically on a hiding to nothing. If he fixes them securely someone will bash their heads on them, anything less than welding would see them "borrowed" for a party and after all that he still has to get power that will not fit in a pint glass to the things. Difficult. Remember this is the boat that said the earth was "chuck a cable over the side" back in the day. The guy is working against years of "party" culture, more power to him for seeking advice. Respect. Link to comment Share on other sites More sharing options...
MikeDennis Posted October 14, 2011 Author Share Posted October 14, 2011 Personally I don't think it is the manner of fixing, it isn't structural AFIK Seano but superstructure we are talking about. Mike is basically on a hiding to nothing. If he fixes them securely someone will bash their heads on them, anything less than welding would see them "borrowed" for a party and after all that he still has to get power that will not fit in a pint glass to the things. Difficult. Remember this is the boat that said the earth was "chuck a cable over the side" back in the day. The guy is working against years of "party" culture, more power to him for seeking advice. Respect. Wow. Thanks Kerry...! Nice to know someone understands what I'm up against here :) Thanks everybody else for your advice though. I went with the initial Doughty scissor clamp suggestion. They're great. They make me want to get into steel masonry or welding or something similar - basically anything that might take me away from 30 hours of clubs a week! Hmph. Link to comment Share on other sites More sharing options...
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