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Electro-Voice EVF/EVH User Manual46
6.0 Rigging-Strength Ratings and Safety Factors (cont’)
6.5 HRK Rigging Structural Ratings for Horizontal Clusters
The guidelines for simplified horizontal structural ratings cover the following information:
1. Maximum height of the cluster.
2. Maximum weight of the cluster.
3. Cluster combinations, per weight and height.
4. Using tie plates for suspension.
5. Suspension-line angles for HRK rigging.
6. Symmetry of cluster.
7. Inner connection points.
8. Left-to-right horizontal cluster angles.
Using the HRK horizontal rigging kits, any combination of EVF and EVH enclosures can be assembled in
a cluster as long as the WLL, angles, and height limits are observed. For horizontal clusters, left-to-right
symmetry must also be observed to keep even loads across suspension lines.
Table 13:
Maximum load and maximum height for horizontal clusters
LIMITS FOR HORIZONTAL CLUSTERS ONLY
Maximum Working Load Limit Maximum Height
Three-over-Three = 980 lb (445 kg)
Two-over-Two = 634 lb (288 kg)
Max. Two Enclosures High
or 5.25 ft (160.1 cm)
Table 14 gives a brief guide to the cluster combinations possible within the WLL of the EVF and EVH
enclosures.
Table 14:
Possible horizontal cluster combinations within the WLL of each enclosure
LIMITS FOR HORIZONTAL CLUSTERS ONLY
Clustered Enclosures
Maximum Number
of Enclosures
Minimum No. of
Suspension Lines
Tie Plate Angle
Restrictions
Three enclosures over
three enclosures
6
4
(2 per side)
See Figure 32
Two enclosures over
two enclosures
4 2 See Figure 32
Three enclosures across 3
4
(2 per side)
See Figure 32
Two enclosures across 2 2 See Figure 32
SUSPEND HORIZONTAL CLUSTERS USING TIE PLATES ONLY, NO EYEBOLTS.