|
|
 |
 |
|
For over 80 years SECOA had been manufacturing rigging equipment for the
Performing Arts Industry. SECOA is known for manufacturing the highest quality
rigging systems. As the most common form of theatrical rigging in use, SECOA’s
counterweight rigging systems can be found in theaters all across the country.
These systems are an economical rigging solution for high schools and a proven,
dependable system for the professional theater. Through its manufacturing
processes and capabilities, SECOA provides "off-the-shelf"
configurations or customized products to support venue-by-venue application
issues.
Typical Types of Manual Rigging
Single Purchase Systems
A manual rigging system
where the pipe battens travels the same distance as the counterweight arbor. In
a single purchase system the counterweight should be equal to the weight
supported on the pipe batten. Every foot of travel in the counterweight arbor
and control line equals a foot of travel at the pipe batten.
Double Purchase Systems
A type of manual rigging system designed for a building with a limited operating
gallery height. In a double purchase system the counterweight arbor only
travels half the distance of the onstage load. With this system the amount of
weight located in the counterweight arbor is double the weight of the onstage
suspended load, typically resulting in longer arbors. For every foot of travel
in the counterweight arbor the control line and the pipe batten will travel 2'.
Hand Winches
Hand winches are a great compliment to our counterweight systems, or a stand
alone system for limited use linesets. For applications from light ladders to
linesets a hand winch may be the most economical system to meet your needs. A
hand winch setup may also be a smart replacement for a dead hung set.
Common System Components
Headblocks
Headblocks are a large
sheave, grooved for support lines and hauling lines and attached to the support
steel directly above the fly rail. There is one headblock per lineset. All
headblock sheaves are available in cast iron, nylon, or steel with standard and
custom sizes and groove details. Headblocks include: 8", 12",
16", or 20" sheaves all with Timken tapered roller bearings and
includes mounting clips and bolts. Headblocks are available in upright,
underhung, and in double purchase configurations.
Loftblocks
Loftblocks are sheaves
bolted to the structure and used to take the cable from the horizontal pull
from the headblock to a vertical pull attaching to the pipe batten. There is
one loftblock per lift line in a lineset . All loftblock sheaves are available
in cast iron, nylon, or steel with standard or custom sizes and groove details.
Loftblocks include 8", 12", 16" or 20" sheaves, Timken
tapered roller bearings, and mounting clips. Loftblocks are available as
upright, underhung, throat cut beam mount, and unitized configurations.
2-7/16" nylon idler pulleys are available as an option for all loftblocks.
Spotblocks
Spotblocks, blocks similar
to loftblocks, are used for temporary linesets (rigged with rope) required for
specific productions. Spotblocks are available as cast iron with 8" or
11" sheave with ball bearings, and includes j-bolts and u-clips.
Spotblocks are available in single sheave, multiple sheave, upright, and
underhung configurations.
Muleblocks
Muleblocks are pulleys
designed to change the horizontal direction of a moving line. All muleblocks
are available in cast iron, nylon, or steel sheaves for custom sizes and
grooving details. Muleblocks include 8" and 12" sheaves with Timken
tapered roller bearings, and include mounting clips and bolts. Muleblocks are
available in single line, multi-line, single sheave, and in multiple sheave
configurations.
Floor Block (Tension Blocks)
Floor blocks complete the
control line loop from the headblock back to the bottom of the arbor. They also
compensate for normal expansion/contraction of the purchase line caused by
humidity and temperature. All floorblocks are available in cast iron.
Floorblocks include 8" or 11" sheaves with ball bearings, and
complete w/ guide shoes. Floorblocks are available in wire guide, 4-post,
T-Bar, and floorblock/ropelock combination. Replacement guide shoes are
available.
Arbors
A carriage designed to
contain counterweights used in a manual rigging system. Arbors are available in
configurations including: single purchase, double purchase, wire guide, and
lattice track. Guide tracked arbors are available for 1-1/2" Tee, 2"
Tee, and 1-1/2" Aluminum J-Bar and for all T-Bar centers. All arbors are
sized in lengths determined by the specified lineset loads. Replacement guide
shoes are available.
Purchase Line (Hand Line)
The control line (rope)
used to operate the arbor, thus moving the lineset in or out. Currently, the
most popular ropes for purchase lines are ¾" Multi Line 2 and ¾"
Stage Set X.
Rope Locks
Ropelocks are a
positioning device that prevent movement of a rigging set by the use of a cam
action jaws pinching the purchase line. When the ropelock is closed a balanced
lineset will not move. To move a lineset the ropelock must have the oval safety
ring and the ropelock handle released. Ropelocks are not intended for securing
substantial imbalance.
SECOA’s new rope lock is designed to be the quietest rope lock we have ever
made. Its standard configuration allows an optional padlock to be used to lock
the rope lock open or closed.
See cut sheet…
Guide Systems
Manual counterweight
rigging systems may be guided by various methods. The guides maintain the
spacing of the counterweight arbors during their vertical travel. The most
common is steel t-bar guide wall with 1-1/2" x 1-1/2" x 3/16" or
2" x 2" x ¼" steel tee running the length of the guide wall on
the set center (typically 6" or 8", other centers are available as
required). T-Bar guides require an uninterrupted wall to be effective. Other
guide system options are Aluminum J-Bar guide (similar to steel t-bar, but with
aluminum J instead of steel T), and Lattice Track. Another guide option is wire
guide ( 2 wires, one of the front and one on the back of each arbor guiding the
vertical travel), wire guides are useful when a t-wall is not feasible.
|
|
|
