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Electro-Voice EVF/EVH User Manual
Rigging-Safety Warning
3
This document details general rigging practices appropriate to the entertainment industry, as they would apply to the rigging
of Electro-Voice EVF and EVH loudspeaker systems. It is intended to familiarize the reader with standard rigging hardware and
techniques for suspending EVF and EVH loudspeaker systems overhead. Only persons with the knowledge of proper hardware
and safe rigging techniques should attempt to suspend any sound systems overhead. Prior to suspending any Electro-Voice
EVF and EVH loudspeaker systems overhead, it is essential that the user be familiar with the strength ratings, rigging tech-
niques and special safety considerations outlined in this manual. The rigging techniques and practices recommended in this
manual are, of necessity, in general terms to accommodate the many variations in loudspeaker clusters and rigging configura-
tions. As such, the user is expressly responsible for the safety of all specific EVF and EVH loudspeaker cluster
designs and rigging configurations as implemented in practice.
All the general rigging material contained in this manual is based on the best available engineering information concerning
materials and practices, as commonly recognized in the United States, and is believed to be accurate at the time of original
printing. As such, the information may not be directly applicable in other countries. Furthermore, the regulations and require-
ments governing rigging hardware and practices may be superseded by local regulations. It is the responsibility of the user to
ensure that any Electro-Voice loudspeaker system is suspended overhead in accordance with all current federal, state and local
regulations.
All specific material concerning the strength ratings, rigging techniques and safety considerations for the EVF and EVH loud-
speaker systems is based on the best available engineering information concerning the use and limitations of the products.
Electro-Voice continually engages in testing, research and development of its loudspeaker products. As a result, the specifi-
cations are subject to change without notice. It is the responsibility of the user to ensure that any Electro-Voice loudspeaker
system is suspended overhead in accordance with the strength ratings, rigging techniques and safety considerations given in
this document and any manual update notices. All non-Electro-Voice associated hardware items necessary to rig a complete
EVF and EVH loudspeaker cluster (chain hoists, building or tower supports and miscellaneous mechanical components) are the
responsibility of others.
Electro-Voice
June 2010
Table of Contents (cont’)
6.5 HRK Rigging Structural Ratings for Horizontal Clusters ...................................................................................................... 46
6.51 Using Tie Plates as Main Load-Bearing Suspension ............................................................................................47
6.52 Suspension-Line Angles for HRK Kits .................................................................................................................... 48
6.53 Symmetry for Horizontal Clusters using HRK Kits ............................................................................................... 49
6.54 Inner Connection Points ............................................................................................................................................. 50
6.55 Left-to-Right Horizontal Cluster Angles .................................................................................................................. 50
6.6 Ratings for Outdoor Applications with Wind Loading ........................................................................................................... 51
6.7 Electro-Voice Structural-Analysis Procedures ......................................................................................................................... 51
7.0 Rigging Inspection and Precautions ........................................................................................................................................................... 52
8.0 References ..................................................................................................................................................................................................... 53
8.1 Rigging (Printed) ............................................................................................................................................................................. 53
8.2 Mechanical Engineering (Printed) ............................................................................................................................................... 53
8.3 Rigging (Websites) ........................................................................................................................................................................ 53
Notes ......................................................................................................................................................................................................................... 54