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6.0 Rigging-Strength Ratings and Safety Factors (cont’)
6.2 Structural Rating Overview
Designing a safe structural cluster is usually a very complex process best left to experienced profession- als. Since the EVH and EVF rigging options allow the user to configure a wide variety of clusters, the following guidelines have been broken into three sections: eyebolts, vertical rigging and horizontal rigging. Each section will give the end user guidelines for maximum weight and height of clusters. At the end of each section, typical clusters will be recommended. The following is a short synopsis of the consider- ations involved.
There are three independent strength ratings that, together with listed maximums, give a complete de- scription of the overall structural capabilities of the loudspeaker cluster.
1.The strength of each
2.The strength of the rigging plates included in the VRK and HRK rigging kits described in section 5.0 EVF and EVH Rigging System.
3.The strength of the
Using the three strength ratings listed above, maximum cluster heights and weights will be recommended so that the cluster maintains an 8:1 safety factor.
In any cluster, the forces acting on each loudspeaker (on each individual rigging point and on the enclo- sure) and the forces acting on each point of the rigging accessory
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