Harman JBL Professional VTX Series, Rigging Manual

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VTX A
6 | Rigging Manual
2 - MECHANICAL LIMITS
The VTX A6 suspension system and accessories comply with the 2006/42/EC Machinery Directive and have been designed following the
guidelines of DGUV regulation 17 (BGV-C1) for a minimum safety factor of 4:1. Minimum safety factor requirements for suspended arrays
are often set by local regulations. Use JBL Line Array Calculator 3 (LAC-3) software to check mechanical limits and ensure compliance
with local regulations. ANSI Standard E1.8 (Entertainment Technology Loudspeaker Enclosures Intended for Overhead Suspension),
Section 5.3.4, specifies a minimum safety factor of 5:1. If compliance with the ANSI standard is needed, make sure that the array design
produces a minimum safety factor of 5:1.
ARRAY FRAME NOTES SAFE LIMIT MAXIMUM LIMIT
VTX A6 MF Non-mixed arrays using the VTX A6 Mini Frame (15) (24)
VTX A6 SB (1) Suspension Bar used as an Array Frame (top) (16) (24)
VTX A6 SB (2) (2) Suspension Bars are used (top and bottom) (16) (24)
VTX A6 CM Non-mixed arrays using the VTX A6 Ceiling Mount (8) (8)
2.1 SUSPENDED ARRAY
NOTES:
• LAC-3 allows for array designs with a minimum design factor of 4:1. Anything lower than that is not allowed.
• For exact mechanical limits of mixed arrays (A6s suspended under B15s), always check the design with LAC-3.
• Safe and maximum limits are only applicable to the specified accessory (i.e. base plate or array frame). When several accessories
are combined (for example, ground-stacked arrays with a base plate and subwoofers underneath), the design should always be
evaluated and checked with LAC-3.
• For additional information on B15 limits, refer to the VTX B15 Rigging Manual .
ACCESSORY NOTES SAFE LIMIT MAXIMUM LIMIT
VTX A6 BP Base plate for ground stacking A6 systems (2) (8)
2.2 GROUND-STACKED ARRAYS
TERMINOLOGY:
Safe Limit: The safe limit provides the number of cabinets that can be used in an array while maintaining a safety factor of 4:1 or higher.
The safety factor of an array is determined by the number of cabinets, the array shape, and the overall array angle. An array constructed
within the safe limit will always yield a safety factor greater than 4:1 regardless of array parameters and conditions. Ground-stacked ar-
rays within the safe limit are stable under normal conditions. Designs exceeding the safe limit and up to the maximum limit are possible,
but JBL Line Array Calculator 3 software should be used to check mechanical safety for the given configuration.
Maximum Limit: Arrays larger than the maximum limit are not allowable under any conditions.
CAUTION: Limits for ground-stacked arrays always assume that the stacking surface (floor or stage) is flat . Do not
deploy ground-stacked arrays on non-flat surfaces to avoid tipping hazards .