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Truss System

Roc-Off provides quality James Thomas Engineering Trusses for event production needs.

Ground Support:

The system is simple, safe and very strong. It allows loads to be raised up to height of 40'. The 15" ground support tower (2 tons pre-rigged super truss) at 40' high consist of a base, hinge section 2'6" tower, 5' tower, 3-10' tower roller beam, and suitable sleeve block.

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12" x 12" General Purpose truss is manufactured from 2" dia x 0.125" wall and 1" dia x 0.125"
wall 6082T6 or 6061T6 Aluminium tubing. Bolts are supplied for assembly of truss elements. This
truss is ideal for conference, exhibition, and small venue work. By incorporating suitable sleeve blocks and towers, this truss can be used with our Ground Support System.

User Instructions

   

15" x 15" General Purpose truss is manufactured from 2" dia x 0.125" wall and 1" dia x 0.125" wall 6082T6 or 6061T6 Aluminium tubing. Bolts are supplied assembly of truss elements. This truss is ideal for conference, exhibition, and small venue work. By incorporating suitable sleeve blocks and towers, this truss can be used with our Ground Support System.

User Instructions

   

Pre-Rig truss is 30" x 26" in size. It is manufactured from aluminium tube 6082-T6 with 2" x .125"
wall thickness for main tubes and 1" x .125" wall tube for the diagonals. Each truss piece has 4 castor
wheels for easy maneuverability and bolts for the connection of truss pieces.

Each truss is designed to carry 2 lighting bars complete with lanterns. The lighting bars are stored
internally in the truss and can be lowered to the working position when in use. This design reduces the
amount of space required for lighting and rigging in the truck. Each truss is also designed to carry a
varying amount of lanterns, the 10' section carries 2 bars of 8 lanterns, 7' 7"section carries 2 bars of 6
lanterns, 5' section carries 2 bars of 4 lanterns, and the 3' 9-1/2" section carries 2 bars of 3 lanterns. This
feature enables great flexibility in the truss design.

The Pre-Rig truss accepts a modified lighting bar which have 2 sleeved holes in them. The lighting
bars are located inside the truss by guide rods. In the storage position the bars are securely held in the
truss by shank hooks. The whole system can be used with our Ground Support System by using suitable
sleeve blocks and towers.

User Instructions

   

The 12" square ground support tower. A system manufactured with the purposeof providing a lifting medium for a variety of Thomas trusses ranging from 12" x 12"through to heavy duty truss.

The towers will provide the necessary equipment to support a truss rig in venues where the flying points are either not strong enough, or in the right place. Each tower is capable of lifting 2 ton to a maximum height of 33 feet. The 2 ton weight must include the self weight of the truss rig and the motors. The truss rig is raised and lowered by means of electric chain hoists. The motor is rigged in the truss and works in double fall due to the chain being passed over the roller beam at the top of the tower. The motor is then connected onto the other side of the sleeve block. Below, we list a brief description of the parts which make up a 12" ground support tower.

The base of the tower has 4 screw jack assemblies with 6" diameter foot pads which are adjustable to enable leveling of the tower. The base also incorporates 4 ball castors which allows the whole rig to be accurately positioned before the tower is raised. Once the tower system is ready to be raised, all the screw jacks must be adjusted evenly and must take the load off the ball castors.

The hinge section is designed to allow the towers to be assembled horizontally at truss top level before being swung and locked in the vertical operating position. The tower sections are manufactured from aluminum 6082-T6 2" x .157" thick wall tube with 1" x .125" wall diagonals.

The tower sections are connected together by Camloc quick release bolts. The tower sections are in modular form to allow 30" adjustments in height up to a maximum of 33 feet. Once the tower height has been determined, then the roller beam is fitted at the top of the tower. The roller beam accepts the chain from the chain hoist which is run over the top of the roller beam and back down to the other side of the sleeve block. The sleeve block is the interface between the truss rig and the towers. It is designed to create a semi-rigid joint between the truss grid and the towers by using 16 heavy duty 4" wheels to guide the rig up each tower.

User Instructions

   

The 15" square ground support tower is a system manufactured for the purpose of providing a lifting medium for a variety of Thomas trusses from, 20.5" x 20.5", Heavy duty, Supertruss, and Pre-rig truss through to Roof systems. The towers will provide the necessary equipment to support a truss rig in venues where the flying points are either not strong enough, or not in the right place.

Each tower is capable of lifting 4 tons to a maximum height of 40 feet. However, if you use a CM 1 ton hoist you will only be able to lift 2 tons (ie. block and fall). The 4 ton weight must include the self weight of the truss rig and the motors. The truss rig is raised and lowered by means of electric chain hoists. The motor is rigged in the truss and work in double fall due to the chain being passed over the roller beam at the top of the tower. The motor is then connected onto the other side of the sleeve block.

Below, we list a brief description of the parts which make up a 15" ground support tower.The base of the tower has 4 screw jack assemblies with 6" diameter foot pads which are adjustable to enable levelling of the tower. The base also incorporates 4 ball castors which allows the whole rig to be accurately positioned before the tower is raised.

Once the tower system is ready to be raised, all the screw jacks must be adjusted evenly and must take the load off the ball castors. The hinge section is designed to allow the towers to be assembled horizontally at truss top level before being swung and locked in the vertical operating position. The tower sections wall tube with 1" x .125" wall diagonals. The tower sections are bolted together to allow 30" adjustments in height up to a maximum of 40 feet.

Once the tower height has been determined, then the roller beam is fitted at the top of the tower. The roller beam accepts the chain from the chain hoist which is run over the top of the roller beam and back down to the other side of the sleeve block. The sleeve block is the interface between the truss rig and the towers. It is designed to create a semi 16 heavy duty 4" wheels to guide the rig up each tower.

User Instructions

 

 

 

 

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ROC-OFF PRODUCTIONS
11220 Interchange Circle North
Miramar  FL 33025

Superior quality service for corporate presentations,
sporting events, concert tours and general productions.
Rentals stage-right stages, James Thomas load bearing roofs, ground supports,
risers, hoists, genies, truss, follow spots, rentals, scaffold, camera platforms, and ramps etc.

Toll Free: 1-877-9STAGES
Phone: 954-436-2118
Fax: 954-435-4105



   
       
   
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