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| Stagefright Instillation by Suspect Culture in connection with RSAMD TPA students Calum Willoughby, Kirsty Campbell and Louise Marr.
| | #REDIRECT [[CCA Installation]] |
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| == The Project ==
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| [[Image:View of the CCA installation space1.jpg|thumb|right|250px|A view of the CCA installation space]] | |
| We were asked to be involved with Suspect Cultures Stagefright Instillation at The Centre for Contemporary Arts (CCA) in Glasgow. This installation involved an element of suspending between 20 - 30 Silver Birch trees (sourced from a sustainable forest) above the [http://cca-glasgow.com/cafe Cafe/Bar] in the CCA. The cafe has no structure above it but is an open space climbing 2 levels to a glass roof. The cafe is in fact located between the two buildings that have been linked to make the CCA.
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| We were restricted as to the infrastructure we could build because we could not damage or mark the buildings in any way. Any structure had to be completely self supporting in that respect.
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| == Our Solutions ==
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| ===Number 1 - Calum Willoughby===
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| ====What it is====
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| Use [http://www.outdoorgb.com/p/petzl_coeur_bolt_hanger_10_mm/ Petzl Rigging Plates] [Approx £2-3] and coach screws [£2.79 for 10 {M10 x 90mm}]
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| Drill a pilot hole into the trunk on either side of the base. Screw one plate on either side and attach steels with a half ton shackle. Higher up the tree put another two plates on the remaining two sides. Shorter drifts will be needed on these points.
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| ====POA for rig====
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| Use a Chain Hoist to lift the tree at the end of the cafe with the bar. Choke a round sling around the trunk and let the Chain Hoist take the weight whilst the 4 lines are attached to the grid. Finally the tree is slid out to its required position using guide ropes. A means will need to be devised for securing the drifts into position on the Grid wires.
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| ====Costing====
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| Very Cheap. Steel Drifts would need to be manufactured. £1 approx per meter
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| Rigging plates and coach screws relatively cheap.
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| Chain Hoists from RSAMD after Opera 2 has finished, single phase so no power problems
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| ===Number 2- Kirsty Campbell===
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| ====What it is====
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| I propose to drill through each tree trunk in two separate places, the position of which would depend on it's size and weight. Large Eyebolts would then be put through the holes and an eye-nut put on the end. This would provide us with 4 hanging points per tree. To ensure that the tree remained vertical we would have to make sure that the position of the hanging points did not make it top heavy and cause it to tip.A drift would then be shackled to each eye and then shackled to the grid system. These could then be lx-taped to to the grid to stop them from slipping along the steels.
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| [[Image:Cca_project_2.png|thumb|left|click to view larger]]
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| ====POA for rig====
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| Ideally I would like to use Stagehire Scotland's method of installing the truss sections to gain access to their grid in order to hang the trees. However if this was not possible we could try and find a point capable of housing either a chain block or hemp rope so that we could haul the trees up to the desired height. We could then attach the trees to the grid system from the second floor balcony. If we attached a piece of hemp rope to the trunk we could then use it to pull the trees across to the correct position on the grid.
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| ====Costing====
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| *Item- Eye bolts (Available from Flints.)
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| ** Type- Drop forged collared long shank eye bolts.
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| **Size- M12, 178mm thread
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| **Price- £9.84 (each)
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| **Notes- These are expensive although they are safe to use with non-vertical loads.
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| *Item- Eye nuts
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| **Size- M12
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| **Price- £2.95 (Each)
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| *Item- Wire rope
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| ** Type- 7core soft flexible steel rope
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| **Size- 5mm
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| **Price- £1.79 (per meter) £139.00 (per 100 meters)
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| *Item- Shackles
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| **Type- Blue pin bow shackles
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| **Size- 0.5t
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| **Price- £1.84(each)
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| *Item- Nyloc Nuts
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| **Type- Steel nylon insert nuts
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| **Size- M12
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| **Price- £6.90
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| ===Number 3 - Louise Marr===
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| ====What it is====
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| A very simple system of drilling a hole through the trunk of each tree then running PVC covered steel rope through the hole and up the trunk of the tree secured as far up as possible by grummets. Each tree would have two sets of lines running at right angles to each other.
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| The lines would then be terminated by wedge sockets and shackled to 4 points on the built “grid”.
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| [[Image:Tree 1.jpg|thumb|left|click to view larger]]
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| ====POA for rig====
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| 1) Drill holes in tree
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| 2) Thread pre cut PVC covered steel rope through
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| 3) Grummet the steel as far up as is practically possible
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| 4) Terminate wire rope in wedge socket
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| 5) Prep 4 rigging points on “grid”
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| 6) Attach chain block to tree
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| 7) Lift tree into air
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| 8) Attach 4 lines to “grid”
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| 9) Release lifting lines
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| * When rigging the chain block attach it to the grid by means of a round sling or similar so that once one tree is up you move the chain block to the next position and hall the next tree. This way takes slightly longer but each tree is lifted to its desired location avoiding the need to move them once up in the air.
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| * Because you are using lines to lift the tree into position there is little stress on the grummets so it is unlikely that they will have the forces on them that will cause them to pull out. They should also be put in with 2 machine screws and 2 wood screws as per manufacturers recommendations or bolted in.
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| ====Costing====
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| *5mm wire covered to 6mm; SWL 1380kg; 1m = £0.91; 100m = £81.00
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| *5-6.5mm Wedge Socket - £8.82per socket
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| *6mm Dogs (DIN 1142) £20.80 per 100
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| *Grummet - £1.00 each (£0.90 each when ordering 100)
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| ===Number 4 - Steve Macluskie===
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| ====What it is====
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| Single Hanging Iron at the foot of the trunk. one single steel going up the trunk with a timber hitch
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| SEE LINK [http://en.wikipedia.org/wiki/Timber_hitch]
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| ====POA for rig====
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| Haul tree up at Bar end of the space, clip on and pull out to position.
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| ====Costing====
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| £5.80 per flying iron (unlipped) Plus bolts to go right through the trunk
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