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Old 12-07-2012, 06:46 PM   #1
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Default Monkey house fixture anchors

Im installing these lights in a monkey house in zoo. The trainers say monkeys jump on it, sit on, and make a pyramid and push on. Vandal type heavy ones. Should i go large wedge anchors, lags, chemical, or something else? Mostly sheer butsome tensile concerns. Solid cinder almost like concrete
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Old 12-07-2012, 06:55 PM   #2
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Looks like your getting some new lights for your house.
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Old 12-07-2012, 07:00 PM   #3
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Old 12-07-2012, 07:02 PM   #4
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Quote:
Originally Posted by Ninety View Post
Anything I say about that fixture will be deleted because of obscenity.

-John
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Old 12-07-2012, 07:02 PM   #5
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For a public job like that,I would sit down and read the specs and contracts, something you don't seem to like to do.
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Old 12-07-2012, 07:11 PM   #6
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Wedges, installed horizontally, will hold tight when they go all ape **** on it.
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Old 12-07-2012, 07:25 PM   #7
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Quote:
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Wedges, installed horizontally, will hold tight when they go all ape **** on it.
How much do big monkeys and oranatangs weigh? Fixture is 70pds. How much do i add for shear when they do the up and down thing they do possibly on the fixture?
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Old 12-07-2012, 08:47 PM   #8
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Alright. I'm getting somewhere now, but not quite there. I've determined the average monkey/orangatang is around 200 lbs. So, using F=ma I tried several variations to try to calculate the weight of impact (monkey up and down thing they do on fixture potentially). Here are several variations based on F=ma

First, I tried this one using slugs so

100 slug x ft/sec = 100 x 3 (monkey jump height) / 0.5 s (absorbtion stopping time) = 600 lbs

Method 2

F=ma where m=91g and a= v-u/t or A= 9.8m/s^2(accelaration due to gravity)+GPE(gravitational potential energy i.e. weight x height)

which boils down to F=ma so 970 pds after conversions

Third Method

The General Fall of Impact Method which is

impact force = weight X (falling/stopping + 1)

200 x (3 / 0.5s + 1) = 600 lbs

Which Method seems closest for shear calculations ?

Then, if I have 6 bolts do I divide by 6 evenly or put a higher ratio on the top 3 bolts then the lower 3 bolts??
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Old 12-07-2012, 08:49 PM   #9
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Oops

3rd Method 1,400 pds just caught it
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Old 12-07-2012, 10:26 PM   #10
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You put a lot of thought into this one.

I usually just tilt my head to one side, rub my whiskers and come up with a plan.
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Old 12-07-2012, 10:42 PM   #11
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Well, for my pet ape, i just use some temp lighting.

works great!
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