JBL VTX Series Rigging Manual
Also see for VTX Series: User manualUser manualRigging manualWiring guideUser manual
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Contents
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10VTX B 18 | Rigging Manual3 - MECHANICAL LIMITSThe VTX B18 suspension system and accessories comply with the 2006/42/EC Machinery Directive and have been designed followingthe guidelines of BGV-C1 for a minimum safety factor of 4:1. Minimum safety factor requirements are often set by local regulations andthe JBL Line Array Calculator TM should always be used to check mechanical limits.TERMINOLOGIES:Safe Limit: The safe limit provides the number of cabinets that can be used in an array and always produce a safety factor of 4:1 orhigher. The safety factor of an array is determined by the number of boxes, the array shape, and the overall array angle. An A8 array thatis within the safe limit will always yield a safety factor greater than 4:1 regardless of the array parameters and conditions. Designs muchgreater than the safe limit, and up to the maximum limit can be achieved, but the JBL Line Array Calculator software should be used tocheck mechanical safety for the given configuration.Maximum Limit: Arrays larger than the maximum limit are not allowed under any conditions.ARRAY FRAME NOTES SAFE LIMIT MAXIMUM LIMITVTX A8 AF + EB VTX A8 AF - Array Frame with Extension Bar attached 12 x B18 16 x B18VTX A8 SB 1 x Suspension Bar used as an Array Frame (top center) 16 x B18 16 x B18VTX A8 SB (X2) 2 x Suspension Bars used at the top (front / rear rigging bars) 10 x B18 16 x B18VTX A8 SB (X2) 2 x Suspension Bars used at the top and bottom (pull-back) 12 x B18 16 x B18VTX A8 MF VTX A8 MF - Mini Frame 4 x B18 4 x B183.1 - VTX B18 LIMITS - SUSPENDED ARRAYNOTES:• 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 combination arrays (A8s suspended under B18s) always check the design with LAC-3• For mechanical limits when using dual Suspension Bars always check the design with LAC-3• For additional information on B18 limits, refer to the VTX B18 Rigging Manual• ANSI Standard E1.8-2005 (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 in LAC-3produces a minimum safety factor of 5:1 |
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