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Matt M
Trad climber
Alamo City
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May 11, 2012 - 11:01am PT
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I've sketched out a couple of "crack machines" that I hope to incorporate into my kids swing set (HOA might not notice!). It would consist of a "T" with two corner cracks built into the intersection of the "T". You could add an insert to change its size. That gets you corner cracks, then on the other side (Flat top of the "T") I'd add several cracks all next to each other. I think, having done it once before, that adjustable cracks with threaded rods are a PITA and you never adjust them. I'd just make 5-6 cracks of varying sizes net to one another with permanent wood spacers for each size. Now I just need to incorporate the "T" into a Moon Board build and I'm all set...
EDIT: Just saw the post above and see the "T" idea could work! sweet build!
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Steve Grossman
Trad climber
Seattle, WA
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May 12, 2012 - 08:44pm PT
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There ain't nothing like the real thing baby, nothing like the real thing...
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briham89
Trad climber
los gatos. ca
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May 12, 2012 - 08:46pm PT
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steve that is awesome!
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kaholatingtong
Trad climber
the green triangle, cali
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May 12, 2012 - 08:55pm PT
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^^ epic
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E Robinson
climber
Salinas, CA
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May 13, 2012 - 01:02am PT
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Very cool with the real thing.
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Captain...or Skully
climber
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May 13, 2012 - 01:05am PT
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Whoa! That's gotta be hefty....Was that tough to set up, Steve?
It looks awesome.
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Ben Emery
Trad climber
Australia via Bay Area via Australia...
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May 13, 2012 - 06:13am PT
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Wow, that raises the bar a bit...
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Steve Grossman
Trad climber
Seattle, WA
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May 13, 2012 - 11:53am PT
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Once the 5"X5"X7' bars are pinned and then glued into the 2x6 mounting boards, it is pretty easy to tip them into place and add the backing board to set the crack width. Installing them in finished space is going to be a bit more complicated.
Definitely not a one person operation! LOL
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Gary Carpenter
climber
SF Bay Area
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Topic Author's Reply - May 13, 2012 - 01:00pm PT
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Very Cool Steve!!
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cliffhanger
Trad climber
California
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May 13, 2012 - 01:51pm PT
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Perhaps these guys were climbers and just wanted some rock closer to home:
Something like this for the backyard with plenty of cracks by setting the stones close together would be great. Place your stones in the same order as they were quarried for best crack fit.
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Steve Grossman
Trad climber
Seattle, WA
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May 19, 2012 - 01:31pm PT
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Bump for druids dynos...
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kfox527
Trad climber
Central California
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Here are a few pictures of a crack I built over the weekend. It turned out to be less time consuming than I thought. I used 2x12x20 for the main sides and 22 carriage bolts to hold the boards together. Inside the crack each bolt is threaded through a pre-cut piece of outdoor undergreound electrical conduit. Right now the crack is set at about 2 inches to facilitate teaching my students the fundamentals of crack climbing. It will go from about 6.5 wide down to as small as one might like. I'll try to answer any questions the best I can.
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Mungeclimber
Trad climber
the crowd MUST BE MOCKED...Mocked I tell you.
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cool
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CalicoJack
climber
CA
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Mar 12, 2013 - 01:50pm PT
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Hey there,
Just finished building my crack machine over the weekend. Been a fun project that definitely benefited from pics of other folk's projects, and helpful tips from some of the carpenter/engineer types around here.
The crack machine is made up of 12 foot long 2x12's, nit together with 1/2" threaded rods of lengths suitable for adjustment out to about an 8" crack. This contraption is bolted to a support structure composed of two 6x6's, one 16ft the other 10ft, that were sunk 4 ft into the ground, bolted together & cemented in with 360lbs of concrete. For a little extra peace of mind, I tied the support structure back with two 2x4's to a 4ft 4x4, driven 2ft deep & seated with rammed earth.
Anyway, the concrete has had a couple of weeks to cure & we've been having fun on this thing! TRonsighted the first ascent with the crack set to tight #2 camalots (perfect hands for the wife) on Sunday!
Cheers,
Andy
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Some Random Guy
climber
In a chair, drinkin' a beer, watchin' the show
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Mar 13, 2013 - 01:52am PT
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that's cool and all but what about splinters? do you just sand it really well first or cover the insides with something?
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CalicoJack
climber
CA
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Mar 13, 2013 - 01:55am PT
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Yeah- that's an awesome indoor training rig Scrubber! Would be cool to build something on that level of quality, or maybe a 20ft rig outside...
Cheers,
Andy
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