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Author Topic: Tricks for stacks  (Read 3426 times)

Peter Morris

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Re: Tricks for stacks
« Reply #10 on: July 08, 2017, 10:26:55 pm »

Any tricks you guys have for building tall stacks?   Let's say 2+ 2x18 subs stacked - gets in the 4-6ft height range.  How to get giant mains (100lbs or more) up that high safely?   I can't imagine OSHA is cool with standing on rack cases or the back of a truck. 

Thoughts?

For our small shows I built some winch stands that clip on the back of our double 21" subs.  The subs have a bass that is big enough to allow about 3.2m height and the stands are rated for 100Kg with a 10:1 safety factor; from there we use Penn Elcom stands - 4.0m, then VMB or Work line-array stands 6 m  ... when these are not available we stack on stage decks - the photo shows 6 x Flex Array with 3 subs - one on the deck and 2 under the deck.

We change our inventory some time ago so that anything we may have to lift weighs less than about 40kgs (2 people)   
« Last Edit: July 08, 2017, 10:30:16 pm by Peter Morris »
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Mark Cadwallader

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Re: Tricks for stacks
« Reply #11 on: July 08, 2017, 11:34:18 pm »

Northern Tool and Equipment shows a 500# rated crank-up stacker that lifts to 71". Item no 32849-1756; my print catalog says there is a video available online.  It looks like you would need 4" of clearance under the subs to move the stacker into place.
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Chris Grimshaw

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Re: Tricks for stacks
« Reply #12 on: July 09, 2017, 07:20:17 am »

Back when I was using Nexo Alpha regularly, we'd just throw the mid-high boxes up.
Stacking the 2x18" subs (orientated vertically) was a 3-man job. One underneath to walk it up once the guys at the sides had got it somewhere near.

Chris
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Stu McDoniel

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Re: Tricks for stacks
« Reply #13 on: July 09, 2017, 07:57:16 am »

Any tricks you guys have for building tall stacks?   Let's say 2+ 2x18 subs stacked - gets in the 4-6ft height range.  How to get giant mains (100lbs or more) up that high safely?   I can't imagine OSHA is cool with standing on rack cases or the back of a truck. 

Thoughts?
Pickup truck works good.  Set the boxes in the back of the pickup with the gate down.  Back up to the subs and place the boxes on the subs.
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Dave Garoutte

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Re: Tricks for stacks
« Reply #14 on: July 10, 2017, 09:00:55 pm »




Sent from my iPhone using Tapatalk

Plus you can level out the room.
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Tim McCulloch

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Re: Tricks for stacks
« Reply #15 on: July 10, 2017, 09:43:58 pm »

Plus you can level out the room.

That requires a more manly EQ than that little New Holland.

The Caterpillar D9 "Room Equalizer".

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Chris Grimshaw

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Re: Tricks for stacks
« Reply #16 on: July 11, 2017, 03:47:03 am »

That requires a more manly EQ than that little New Holland.

The Caterpillar D9 "Room Equalizer".

When I next work as a guest engineer in a venue, that's going on my rider!

Chris
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Tom Provenza

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Re: Tricks for stacks
« Reply #17 on: July 11, 2017, 06:20:15 am »

For our small shows I built some winch stands that clip on the back of our double 21" subs.  The subs have a bass that is big enough to allow about 3.2m height and the stands are rated for 100Kg with a 10:1 safety facto

Peter,

Would love to see a couple more pics of this solution!

Tom
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Tom Provenza

Tim Hite

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Re: Tricks for stacks
« Reply #18 on: July 12, 2017, 04:46:39 pm »

. . .from there we use Penn Elcom stands - 4.0m, . . .

So, I just spoke with Penn-Elcom and those SAS stands are a great value, but they are designed for indoor use and there is no wind load rating on them. According to sales rep they would have to have eye-bolts added and guy wires run to be used outdoors.

http://www.penn-elcom.com/default.asp?PN=SAS

Really great concept, though. Wish I had more indoor gigs.
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George Powell

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Re: Tricks for stacks
« Reply #19 on: July 14, 2017, 11:42:37 pm »

When I next work as a guest engineer in a venue, that's going on my rider!

Chris
It's on my rider! John Deere last week.   


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