Secondary Safety - Electro-Voice MFX Series Rigging Manual

26 en | Secondary Safety
5

Secondary Safety

In addition to the primary means of mounting or suspension, all loudspeaker cabinets, arrays,
or clusters must be securely attached to an independent, secondary means of suspension
using rigging components with correct and appropriate load ratings. The secondary safety
system should connect the loudspeaker system, bracket or flying grid to a unique anchor or fly
point that is mechanically separate from that used by the primary suspension. Both the
primary and secondary support systems must be capable of bearing the full weight of all
attached loudspeakers.
Steel wire ropes, steel chains or other means of suspension with approved construction, load
capacity, and fire rating (when appropriate) should be used as the basis of the secondary
support system. When attached, each cable or chain should have a small amount of slack but
normally no more than 20mm (¾ inch). The secondary support system must be implemented
in such a way that - in the event that the main suspension fails - the entire loudspeaker system
will be caught with minimal drop and sway when the secondary suspension system is
engaged.
Qualified professionals must specify all secondary safety components, attachment methods,
and anchor or fly points. Follow all applicable local laws and regulations.
Example of secondary support mechanism
1.
2.
3.
4.
2020-01 | V01 | F.01U.382.753
Attach an M10 Eye-Bolt to the bracket
Attach a steel wire rope to the eye-bolt with an appropriate shackle.
Secure the other end of the wire rope to a mechanically separate attachment point.
Leave approximately 20 mm (3/4 inch) slack.
Rigging manual
MFX Brackets & Accessories