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Old 11-02-2006, 05:27 PM
dichdoc dichdoc is offline
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Default Gantry crane specifics

I've been searching through researching gantry cranes. I'd be interested in specifics for the beams and the uprights (pipe vs square) wall thickness for either. Also any designs for adjustable hieght gantry's I currently have 9' ceilings and eight foot doors. Thanks for any input. Travis
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Old 11-02-2006, 06:03 PM
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Here is a good site to start with!

http://www.tseq.com/products/mhequip/gantry-fhs.htm
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Old 11-02-2006, 09:37 PM
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Travis,

The first two numbers that you'll need are the span & the max weight to be lifted. Those will narrow down your selection of I-beams. The shear capacity of the web determines the performance of an I-beam.

Commercially, you'll find both round & square uprights. Is there a reason that you have to have the height adjustable? This adds weight & complexity, and may make the structure less rigid than one of fixed height.

My ceiling is also 9' with 8' doors. The top of my I-beam is 1/2" below the bottom of the garage door tracks. Pretty easy to build it close without touching, if you add the height of casters, posts & beam.
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Old 11-03-2006, 11:59 AM
dichdoc dichdoc is offline
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I'm thinking 10' span and around 2000 lbs capactity. I was thinking adjustable for max height inside and being able to move it out the doors, BUT after remeasuring inside with light and garage door openers etc. it wouldn't make any since to go taller than just under 8'. Where can I find specs on web shear? TB
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Old 11-03-2006, 01:42 PM
JBFab JBFab is offline
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You can locate tables for Uniform Allowable Load through the AISC books for ASD (Allowable Stress Design) or LRFD (Load and Resistance Factor Design) you can choose beams based on span and load in those tables.
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Old 11-03-2006, 02:56 PM
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Here is a chart you can use. Then a quick look in my book. The smallest I-Beam / S-shape it list is a 5 x 10-pound S-shape which in a 10-foot span is good for 3,000-pounds point loaded in the center.
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Old 11-03-2006, 10:18 PM
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I knew there was a photo somewhere ...

http://www.millermotorsports.com/mbo...0&d=1139278821
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Old 11-03-2006, 10:54 PM
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It was also embedded here:
http://www.shopfloortalk.com/forums/...18&postcount=8
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Old 11-03-2006, 11:26 PM
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Tom,

You know what they say, the first thing to go is the memory Sort of like where did I leave the car keys...
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Old 11-04-2006, 06:15 AM
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From there it's "what's a car?"
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