QSC ILA System v2, User Manual

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Rigging the Installation Line Array
Rules for Suspension
Correct use of all suspension hardware and components is imperative in sound system rigging and deployment. •
Always calculate suspended loads before lifting to ensure suspension components and hardware are used within their respective load limits. •
Research local codes and regulations to fully understand the requirements for suspended loads in the venue in which the equipment is •
to be suspended.
Use only shackle holes for suspension of array. •
Be absolutely certain of the integrity of any structural member intended to support suspended loads. Hidden structural members can have hidden •
structural weakness.
Consult a Professional Mechanical or Structural Engineer licensed in the jurisdiction of the sound system installation to review, verify, and approve •
all attachments to the building or structure.
Never assume anything • —owner or third-party supplied suspension attachment points may not be adequate for the loads to be suspended.
Employ the services of a Professional Rigger for hoisting, positioning, and attaching the equipment to the supporting structure. •
Always inspect all components (enclosures, suspension brackets, pins, frames, bolts, nuts, slings, shackles, etc.) for cracks, wear, deformation, •
corrosion, missing, loose, or damaged parts that could reduce the strength of the assembly before lifting. Discard any worn, defective, or suspect
parts and replace them with new appropriately load-rated parts.
Shock Loading
When a load is either moved or stopped, its static weight is magnified. Sudden movements can magnify the static weight several times. This
magnification of static weight is termed “shock loading.” Shock loading poses a danger to equipment and workers. The effects of shock loading can
be instantaneous, or they may remain undetected unless the equipment is visually damaged. Avoiding shock loading requires careful planning and
knowledge of equipment, rigging, and lifting practices.
Shock loading of equipment and structures is usually confined to lifting and installation, but natural forces (winds, earthquakes) can impose shock
loads several times the static load. This is why structures and suspension equipment must be capable of supporting several times the weight of the
equipment suspended.
ILA Working Load Limits and Design Factors
The following table lists ILA suspension components and provides Working Load Limit data at various Design Factors. The tabulated Design Factors are
for static loads only. The choice of which Design Factor to use will depend upon the jurisdiction and venue of installation, as well as the conditions of
suspension. Dynamic conditions are determined by unknown, installation-specific factors and should be referred to a Licensed Structural Engineer for
clarification before proceeding with any suspension of the equipment. The data presented is based upon the listed component weights:
Table 1: ILA Working Load Limits
Component Weight 7:1 Design Factor 10:1 Design Factor 12:1 Design Factor
EB2082-i Extension Bar 38 lb (17.3 kg) 1714 lb (779.2 kg) 1200 lb (545.5 kg) 1000 lb (454.5 kg)
FB2082-i Array Frame 17 lb (7.7 kg) 740 lb (336.4 kg) 518 lb (235.5 kg) 432 lb (196.2 kg)
PB2082-i Pull-Back Bar 6 lb (2.7 kg) 423 lb (192.2 kg) 296 lb (134.5 kg) 247 lb (112.1 kg)
WL2082-i Loudspeaker 37 lb (16.8 kg) 634 lb (288.3 kg) 296 lb (134.5 kg) 371lb (168.6 kg)
WL118-sw Loudspeaker 111 lb (50.5 kg) 740 lb (336.4 kg) 518 lb (235.5 kg) 432 lb (196.2 kg)
M8 Shoulder Bolt 1 N/A 1003 lb (455.8 kg) 702 lb (319.1 kg) 585 lb (265.9 kg)
M8 Ball-lock Pin
1
N/A 1810 lb (822.7 kg) 1267 lb (575.9 kg) 1056 lb (479.9 kg)
M8 Locking Plate
1
N/A 1286 lb (584.4 kg) 900 lb (409.1 kg) 750 lb (340.9 kg)
M12 Shoulder Bolt 1 N/A 4744 lb (2156.3 kg) 3321 lb (1509.4 kg) 2767 lb (1257.8 kg)
3/8
"
Fastener
1
N/A 1943 lb (883.4 kg) 1360 lb (618.4 kg) 1134 lb (515.3 kg)
7/8 " Fastener
1
N/A 8110 lb (3686.4 kg) 5677 lb (2580.5 kg) 4731 lb (2150.4 kg)
1- Working Load Limits are per fastener loaded in double shear. Data is for informational purposes only.