Theatre Design & Technology - Summer 1986 - 44

-*
*

RECOMMENDED
GUIDELINES
continued from page 9 ...

1...-

.....11

Contact Protection
3.3

Rotating and moving parts shall be covered and/or
protected so that persons cannot be injured. Equipment located in normally inaccessible rooms or areas
shall be considered properly protected.

Speed Limits
3.4

3.5

The speed of moving equipment shall be adapted to
the operating conditions.
When moving stage equipment is used, the operator
shall have constant visual contact with the moving
piece. If this is not possible a spotter or visual monitoring device shall be required.

Lift Limit
3.6

Powered pulling, lowering, and lifting devices shall
have limit switches for the lowest and highest
positions.

*

I"""--

*

4.3

*
*
*
*
*
*

3.8

A power disconnect switch shall be located within
reach of the operator.
All rigging equipment shall be labelled in accordance with section 3.
Lighting bridges and work gangways which are not
permanently connected to the structure of the building shall be equipped to assure safe access.

*

Individual counterweight used in working line sets
shall not exceed forty pounds (40 Ibs.).
Weights installed to offset heavy permanent loads
on electrics, light bridges, house curtains, and the like
shall be sized as required.

4.2

Deflecting devices or catch grids are recommended
where counterweight systems are positioned above
working areas.

-12

Thealre Design & Tl'rhnoJog)

USITT SlIllllller 19X6

Rigging system components shall be mounted wit
fasteners designed to prevent accidental loosenin
and detachment.

Drives
4.5

**
*
*
*
*
*
*

In technical stage equipment with hydraulic drivE
an impermissible pressure increase shall be safel
prevented.
Hydraulic and electro-mechanical power system
shall have adjustable limit stops provided for the fin,
operating positions.
Hydraulically and electro-mechanically driven equir
ment shall have acceleration/deceleration ramp
which prevent sudden inertial changes to any attache
items. These ramps shall function at all times and i
all positions. Excepted is an emergency situatio
when the emergency stop switch is activated.
When the direction of travel is to be changed i
hydraulically driven equipment, the movement of th
device is to come to a controlled stop before th
change can be executed.

4.7

Hoses for hydraulic devices shall be certified by th
manufacturer for the maximum design pressure Ie
the given application.
High pressure tubing and piping shall be correct I
and rigidly secured to the structure in order that whir
ping is prevented should a rupture occur. In tempe
rary and permanent installations care shall be take
to secure the devices to the floor, the building strue
ture, and the equipment frame.
In the event of a rupture a device shall be include
which disables the system or that portion of the sy~
tem affected by the rupture.
There shall be engineering data which assures tha
in case of failure or malfunction of the hydrauli
equipment, movement is controlled.

*
*
*
**

*
*
*
*
*
*
*
*
*
*

Positive locking connecting devices between the driv
and the driving pulley, the wire rope drum, the shaf
the sprocket wheel, etc., are permitted withoL
restriction.
Only positive connecting devices which connect th
drive with the driven shall be allowed. The drive an
the driven may be disconnected for servicing only aftE
the load has been secured against any movement.
Before and during any servicing which require th
drive to be disconnected from the driven, all attache
loads shall be safely restrained from movement.

4.6

*

SECTION 4
=..:...:.=...:........:.._-----------REQUIREMENTS FOR SYSTEM ELEMENTS IN
*
LIFTING APPLICATIONS

4.1

All components utilized in stage rigging equipmer
shall be specifically recommended by their manufae
turer or trade organization for hoisting applicatiom
They shall be installed and used in accordance wit
the manufacturers' specifications.

*

___________________ *
Emergency Switch
3.7

4.4

~

continucd on pa~e ·U ...



Table of Contents for the Digital Edition of Theatre Design & Technology - Summer 1986

Contents
Theatre Design & Technology - Summer 1986 - 1
Theatre Design & Technology - Summer 1986 - 2
Theatre Design & Technology - Summer 1986 - 3
Theatre Design & Technology - Summer 1986 - Contents
Theatre Design & Technology - Summer 1986 - 5
Theatre Design & Technology - Summer 1986 - 6
Theatre Design & Technology - Summer 1986 - 7
Theatre Design & Technology - Summer 1986 - 8
Theatre Design & Technology - Summer 1986 - 9
Theatre Design & Technology - Summer 1986 - 10
Theatre Design & Technology - Summer 1986 - 11
Theatre Design & Technology - Summer 1986 - 12
Theatre Design & Technology - Summer 1986 - 13
Theatre Design & Technology - Summer 1986 - 14
Theatre Design & Technology - Summer 1986 - 15
Theatre Design & Technology - Summer 1986 - 16
Theatre Design & Technology - Summer 1986 - 17
Theatre Design & Technology - Summer 1986 - 18
Theatre Design & Technology - Summer 1986 - 19
Theatre Design & Technology - Summer 1986 - 20
Theatre Design & Technology - Summer 1986 - 21
Theatre Design & Technology - Summer 1986 - 22
Theatre Design & Technology - Summer 1986 - 23
Theatre Design & Technology - Summer 1986 - 24
Theatre Design & Technology - Summer 1986 - 25
Theatre Design & Technology - Summer 1986 - 26
Theatre Design & Technology - Summer 1986 - 27
Theatre Design & Technology - Summer 1986 - 28
Theatre Design & Technology - Summer 1986 - 29
Theatre Design & Technology - Summer 1986 - 30
Theatre Design & Technology - Summer 1986 - 31
Theatre Design & Technology - Summer 1986 - 32
Theatre Design & Technology - Summer 1986 - 33
Theatre Design & Technology - Summer 1986 - 34
Theatre Design & Technology - Summer 1986 - 35
Theatre Design & Technology - Summer 1986 - 36
Theatre Design & Technology - Summer 1986 - 37
Theatre Design & Technology - Summer 1986 - 38
Theatre Design & Technology - Summer 1986 - 39
Theatre Design & Technology - Summer 1986 - 40
Theatre Design & Technology - Summer 1986 - 41
Theatre Design & Technology - Summer 1986 - 42
Theatre Design & Technology - Summer 1986 - 43
Theatre Design & Technology - Summer 1986 - 44
Theatre Design & Technology - Summer 1986 - 45
Theatre Design & Technology - Summer 1986 - 46
Theatre Design & Technology - Summer 1986 - 47
Theatre Design & Technology - Summer 1986 - 48
Theatre Design & Technology - Summer 1986 - 49
Theatre Design & Technology - Summer 1986 - 50
Theatre Design & Technology - Summer 1986 - 51
Theatre Design & Technology - Summer 1986 - 52
Theatre Design & Technology - Summer 1986 - 53
Theatre Design & Technology - Summer 1986 - 54
Theatre Design & Technology - Summer 1986 - 55
Theatre Design & Technology - Summer 1986 - 56
Theatre Design & Technology - Summer 1986 - 57
Theatre Design & Technology - Summer 1986 - 58
Theatre Design & Technology - Summer 1986 - 59
Theatre Design & Technology - Summer 1986 - 60
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http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1965Dec
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1965Oct
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1965May
http://www.nxtbookMEDIA.com