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Rigging Equipment

Rigging Equipment

Head Block

The stationary sheave or block assembly directly above the counterweight arbor or pin rail. The head block permits lift lines to change direction. In wire rope systems, the head block is also grooved to allow the purchase line to change direction by 180 degrees. 


Loft Block

The overhead block thorugh which one or more lift lines pass before being attached to the load being lifted or supported.


Floor Block

Designed to remove slack from a purchase line, prevent the purachse line from twisting in its travel, and from rubbing against wire ropes, structural framing, and adjoining equipment. 


Mule Block

A supplementary block located between the head and loft blocks, designed for the specific purpose of changing the direction of the line travel. 


Lock Rail

A structural railing that supports the rope locks.


Pin Rail

A rigidly mounted railing and its associated supports, with holes designed to accept belaying pins. Used in tying off rope and sandbag rigging lines and transfer the unbalanced system loads to the building structure. 


Rope Lock

A device attached to the lock rail that uses adjustable cams to grip the operating line of a counterweight rigging system.  The handle and locking ring allow for the operating line to be locked or released. 


Guide Rail

A means of guiding the counterweight arbor throughout its travel in the vertical plane, the guide rail prevents horizontal or twisting motions of the arbor.


Pipe Clamp

A piece of rigging hardware, consisting of two pieces of metal bolted around a pipe batten with a hole for the attachment of a hanging chain, turnbuckle assembly or rope.


Intersection Bracket

Pair of formed steel plates allowing two 1½" pipes to overlap at a 90 degree angle



A moveable rigid carriage assembly and inclusive guides that holds weights to counterbalance a load.


Index Light

A high quality 2 circuit dimmable LED unit - white for work light in any area of the stage; blue for lock rail or pin rail running lights.  Units are available in 4' and 8' long sections and come with extruded rails on two sides for flexible mounting configurations.  Index strip lights and wall mounted controls are UL listed. 

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