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2 - MECHANICAL LIMITS
The SRX900 Series products 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 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.
2.1 SUSPENDED ARRA Y
ACCESSORY
NOTES
SRX906LA AF
SRX906LA Array with Array Frame
SRX900LA PB
SRX900LA Pull Back accessory used with SRX906LA
SRX910LA AF
SRX910LA Array with Array Frame
SRX900LA PB
SRX900LA Pull Back accessory used with SRX910LA
2.2 GROUND-ST ACKED ARRA YS
ACCESSORY
NOTES
SRX906LA BP
Base Plate for ground stacking SRX906LA systems
SRX910LA BP
Base Plate for ground stacking SRX910LA systems
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.
NOTES:
•
LAC-3 allows for array designs with a minimum design factor of 4:1. Anything lower than that is not allowed.
•
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.
•
Safe and maximum limits for base plate accessories are specified for standalone use. Limits might differ when base plates are at-
tached to subwoofers or other structures.
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 .
SAFE LIMIT
SAFE LIMIT
8
Rigging Manual
MAXIMUM LIMIT
(14)
(16)
(9)
(16)
TBD
TBD
(9)
(16)
MAXIMUM LIMIT
(2)
(6)
(2)
(4)
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