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#1
11-02-2006, 05:27 PM
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Gantry crane specifics
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#2
11-02-2006, 06:03 PM
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__________________
Disclaimer: I’m neither a professional or certified weldor! :evil:
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#3
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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Barry Milton - Please email or PayPal through PrecisionWorks.co PM's are disabled 
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#4
11-03-2006, 11:59 AM
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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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#5
11-03-2006, 01:42 PM
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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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#6
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.
__________________
Disclaimer: I’m neither a professional or certified weldor! :evil:
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#7
11-03-2006, 10:18 PM
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__________________
Barry Milton - Please email or PayPal through PrecisionWorks.co PM's are disabled
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#8
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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#9
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...
__________________
Barry Milton - Please email or PayPal through PrecisionWorks.co PM's are disabled
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#10
11-04-2006, 06:15 AM
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From there it's "what's a car?"
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