QSC ALK-MD3 User Manual

ALK-MD3 Array Link Kit for Three MD-series Loudspeaker Enclosures
This kit is to be used only for arraying of three vertically oriented QSC MD series loudspeaker enclosures, active or passive. Do not use this kit or
any component of this kit for any other purpose. Do not orient the enclosures horizontally under any circumstance.

Contents:

•Array link, AL-MDR3
•Array link, AL-MDF
•Bolt, hex, cap, 5/16"-18TPI x 1.5", grade 5
•Washer, flat, 7/16" x 1" , .07" - .09" thick
•Washer, lock, internal tooth, 3/8"
•Eyebolt, 3/8"-16TPI x 1.5"

Rules for Suspension

• Do not orient the enclosures horizontally under any circumstance.
• 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 lim-
its.
• Research local codes and regulations to fully understand the requirements for suspended loads in the venue in which the equipment is to be
suspended.
• 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, deforma-
tion, 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 plan-
ning 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.

Working Load Limits

Component
MD-F, MD-L, MD-FP, and MD-LP loudspeak-
ers, top and side panel suspension points
MD-F, MD-L, MD-FP, and MD-LP loudspeak-
ers, rear panel suspension points
Eyebolt
*TD-000243-00*
TD-000243-00 revA
1675 MacArthur Blvd., Costa Mesa, CA, 92626 USA
Main Number (714) 754-6175 or toll free (USA only) (800) 854-4079
Customer Service(714) 957-7150 or toll free (USA only) (800) 772-2834
2 each
4 each
14 each
20 each (3 are spares)
20 each (3 are spares)
3 each
Weight 7:1 Design Factor
90 lb 457 lb
(40.8 kg) (207.3 kg)
n/a 314 lb
(142.4 kg)
n/a 857 lb
(388.7 kg)
10:1 Design Factor 12:1 Design Factor
320 lb 267 lb
(145.2 kg) (121.1 kg)
220 lb 183 lb
(99.8 kg) (83.0 kg)
600 lb 500 lb
(272.2 kg) (226.8 kg)