PROVANTAGE / Production Notes 15
A truss drawing is not a rigging calculation.
Safe overhead and temporary structures require verified loads, support conditions, equipment data, venue limits, engineering responsibility, competent rigging practice and inspection.
The selection principle
START WITH
THE APPLICATION.
PROVANTAGE coordinates production requirements and verified equipment information. Structural adequacy, point-load approval and engineered temporary structures remain with the appropriately qualified engineer, venue authority and competent rigging team.
Equipment follows the production decision.
Five-question selection check
Loads
Are self-weight, equipment, cabling, motors, dynamic effects and other imposed loads identified with locations?
Supports
Which venue points, ground conditions, towers or structural elements are approved for use?
Configuration
Is the exact truss type, span, orientation, connection and bracing arrangement defined?
Environment
Do wind, weather, movement, public access or outdoor conditions alter the design case?
Authority
Who designs, approves, installs, inspects and releases the system for use?
Application notes
Context changes the answer.
Venue rigging
Production loads must be submitted in the format and timeframe required by the venue and checked against approved points and methods.
Ground support
Base reactions, ballast, bracing, ground bearing and environmental actions make a temporary structure more than a collection of truss pieces.
Suspended equipment
Fixtures, LED, loudspeakers, scenic elements and cable systems need verified weights, attachment methods, secondary retention and coordinated access.
The common mistake
Dividing total equipment weight by the number of motors
Load distribution depends on geometry, stiffness, pick locations, spans, connections, dynamics and structural behaviour. Arithmetic averaging is not an engineering assessment.
Operational checklist
Brief. Test. Document.
01 / Freeze equipment and configuration data
02 / Publish verified weights and centres
03 / Obtain venue support information
04 / Assign qualified design and approval
05 / Coordinate access and installation method
06 / Inspect and document before release
Technical sources
Primary references.
These sources support the technical principles. They do not imply endorsement, inventory ownership or a universal equipment recommendation.
The PROVANTAGE position
A better brief produces a more dependable system.
We select, place and operate production technology around the room, programme, people and consequences of failure.
Plan the technical brief