Jamtastic3 Posted April 20, 2010 Share Posted April 20, 2010 Hi BR.I'm looking to attach a 4 metre piece of truss between two 5 metre truss pieces (like an H). I can't add T pieces into this set-up for the truss to be all connected, so I was wondering if there was a system where I could attach doughty clamps to the chords on the 4 metre piece? The other problem is that it is all tri truss, so could I still attach 2 chords per side from the 4 metre piece onto one chord of the 5 metre pieces? I ask as I went passed a marque the other day ago and saw that they had a truss system that had a horizontal truss piece clamped at each side to the vertical truss. However these clamps were fully welded on at each end. OR is there another way to do this? Just a note, the 4 metre truss piece is to carry around 30kg of weight near the centre of it's span. Cheers! Link to comment Share on other sites More sharing options...
AndyJones Posted April 20, 2010 Share Posted April 20, 2010 Is it a known truss that you can get load tables for? It's worth checking that a 30kg CPL won't be a problem. I have seen horrible disco truss that I really wouldn't trust! Is the 5m just a temporary addition or permanent? How is the rest of the truss supported? Is it on some kind of clamp? or slung? There are several obvious ways around this: A) The 5m truss sits on top of the 4m bitsB) the 5m truss sits underneath the 4m bits. A) The 5m truss is attached using half couplersB) The 5m truss is attached using a spanset round each bit of truss and a shackle/o-ring/shackle The problem with B is the fact that you loose a lot of height with faffing around with slings. The advantage with B is that it allows a bit of movement between the 4m lengths, which may be handy if they are already slung? although that depends entirely on your situation. With A, you can put two half couplers on the truss at each end, With both systems there is enough redundancy to not really need extra safety's, but as always it wouldn't hurt to add one. A would be my advisable route. Link to half couplers HTH Andy Jones Link to comment Share on other sites More sharing options...
ianl Posted April 20, 2010 Share Posted April 20, 2010 you don't say what make of truss.... trilite / astralite you can get spigots with clamps on (like the clamps on scaff tower outrigers) they come in 2 different lengths to atach as you want to slick litebeem you can get short lengths of truss with snap brace ends Link to comment Share on other sites More sharing options...
Jamtastic3 Posted April 20, 2010 Author Share Posted April 20, 2010 Sorry, I forgot to add that it's Astralite truss (3 chords) Also, the rig is flown with 1 ton rated rigging points at each end of the the 5 metre sections. Each 5m section currently has around 100kg of equipment rigged. Actually, I've just spotted this..... http://www.jpleisure.co.uk/item92019.htm Is this the kind of thing that would work? I'm guessing this threads into the chord at each end. Link to comment Share on other sites More sharing options...
paulears Posted April 20, 2010 Share Posted April 20, 2010 That is designed to stick out so you can out-rig a lantern on it - it is NOT designed to support the weight of a loaded truss. If you can free hang the trusses so each is individually safely rigged, with the corners aligned, then you could bodge something with this and couplers to simple stop the individual trusses swinging - just joining the corners. This would have minimal load and be fine - but if the idea is for it to be structural, I'd steer clear. Remember truss is very thin walled and relies on the truss components to give it strength and rigidity. One of these outriggers is quite capable of fracturing the truss wall with force in the direction of the tube run - towards either end. Astralite is very easy to dent and deform when just knocked against something. Link to comment Share on other sites More sharing options...
Jamtastic3 Posted April 21, 2010 Author Share Posted April 21, 2010 How about this one.... http://www.satsol.co.uk/litestructures/Pro...x?itemno=J63748 This attachment seems more durable than the other link I gave. The spigot hole definitely suggests that this is threaded onto the end of a truss chord. Ideally the 4m truss section would be great if it was attached at the same level as the other 2 pieces. Link to comment Share on other sites More sharing options...
James Remo Posted April 21, 2010 Share Posted April 21, 2010 I think a call to litestructures would have been my first port of call, nothing like getting the information straight from the horses mouth, as it were. They don't bite, and are very helpful. Link to comment Share on other sites More sharing options...
Alex222 Posted April 21, 2010 Share Posted April 21, 2010 Just out of interest is this for a permanent or temp install? If it's temp then im guessing you will be hiring in the truss, if so ask the hire company to supply suitable fixings. If its for a permanent install then a quick call to NL, Live Systems, The Warehouse.. ect, should be able to send somebody over asses what is needed and sell/hire you the correct fixings for the job!alex. Link to comment Share on other sites More sharing options...
dosxuk Posted April 21, 2010 Share Posted April 21, 2010 How about this one.... http://www.satsol.co.uk/litestructures/Pro...x?itemno=J63748 This attachment seems more durable than the other link I gave. The spigot hole definitely suggests that this is threaded onto the end of a truss chord. Ideally the 4m truss section would be great if it was attached at the same level as the other 2 pieces. Yeah, that looks like the right piece. There is another one which is a different length so you can join trusses together with the apex up/down. They allow a spigot and are the same size as the corner sections, so you can put a "corner" in halfway along a length of truss. We have a set of them to join a 5m ladder section between a 5m square of astralite in our venue. Only thing to watch out for is that they don't give you the same weight loading as a proper corner. Give Litestructures a ring, they're friendly guys and will sort you out. Link to comment Share on other sites More sharing options...
Brett Posted April 24, 2010 Share Posted April 24, 2010 Hi BR.I'm looking to attach a 4 metre piece of truss between two 5 metre truss pieces (like an H). I can't add T pieces into this set-up for the truss to be all connected, so I was wondering if there was a system where I could attach doughty clamps to the chords on the 4 metre piece? The other problem is that it is all tri truss, so could I still attach 2 chords per side from the 4 metre piece onto one chord of the 5 metre pieces? I ask as I went passed a marque the other day ago and saw that they had a truss system that had a horizontal truss piece clamped at each side to the vertical truss. However these clamps were fully welded on at each end. OR is there another way to do this? Just a note, the 4 metre truss piece is to carry around 30kg of weight near the centre of it's span. Cheers! A concurrent post has been automatically merged from this point on. Hi BR.I'm looking to attach a 4 metre piece of truss between two 5 metre truss pieces (like an H). I can't add T pieces into this set-up for the truss to be all connected, so I was wondering if there was a system where I could attach doughty clamps to the chords on the 4 metre piece? The other problem is that it is all tri truss, so could I still attach 2 chords per side from the 4 metre piece onto one chord of the 5 metre pieces? I ask as I went passed a marque the other day ago and saw that they had a truss system that had a horizontal truss piece clamped at each side to the vertical truss. However these clamps were fully welded on at each end. OR is there another way to do this? Just a note, the 4 metre truss piece is to carry around 30kg of weight near the centre of it's span. Cheers! sorry posted the other one with out typing answer anyway easy one this http://trilite-zone.co.uk/grabarms.aspx item 1 these are as strong as welded joint put 30kg no problem Link to comment Share on other sites More sharing options...
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