Using Tie Plates As Main Load-Bearing Suspension - Electro-Voice EVF/EVH EVF-1121S User Manual

6.0 Rigging-Strength Ratings and Safety Factors (cont')

6.51 Using Tie Plates as Main Load-Bearing Suspension

Horizontal clusters are attached to the structure with the tie plates located on the rigging plates of the
HRK kits. The tie plates have six holes that will accept a 5/8-inch shackle or similar connector. All main
suspension lines that carry the cluster's load should be tied to these tie plates. Both the front and rear tie
plates on the top boxes must be connected to the building structure when the cluster is installed using a
moderate trim angle as shown in Figure 31.
For purposes of stabilization, especially with the two-over-two cluster, additional stabilization points can
be helpful. These stabilization points can be used as eyebolts on the enclosures at the rear of the cluster.
Figure 31 shows typical stabilization points.
Max. Cluster Weight
634 lb (288 kg)
Max. Cluster Weight
980 lb (445 kg)
Figure 31a: Figure 31b:
Use of tie plates in the suspension of a two-over- Use of tie plates in the suspension of a three-
two cluster using HRK rigging kits over-three cluster using HRK rigging kits
Electro-Voice EVF/EVH User Manual 47