Chain hoist beam?

tomstractorsandtoys · Sep 7, 2016

I need a beam for in my shop to use for a hoist. It will need to span 32 feet and should be capable of handling 4000 pounds. I was thinking of a 12 inch I beam but found this instead. It is a 10x10 H beam with a 3/4 inch thick top and bottom flange. It is half the price of any I beams I found.It is used. Is there any reason you can think of why it will not work? I think it should be heavy enough or maybe someone thinks not? I will need a different trolley and my local welding shop said he could build that if I supply the wheels. Where would you find trolley wheels for a H beam.Any thoughts or ideas? Thanks Tom

IA Roy · Sep 7, 2016

You need to have an engineer run the calculations for you. Strength is one matter, and deflection is another. How you mount it is also a concern. Deflection is probably not that much of an issue with your application. Make sure there is at least a 2 to 1 safety factor. Figure it needs to hold 8000# to be safe at a 4000# load in the center of the span. If it fails, someone's life is in danger, maybe a child or grandchild! The trolley is not as important an issue with safety. However have a backup plan if one of the wheels fails. A loop over top of the beam would probably take care of things.

Dune Country · Sep 7, 2016

The one in my shop isn't 4000# and is just 1/4x6 H beam, There are u shaped brackets hooked to the top flange and screwed into every joist.
As for wheels you might try Nothern or McMaster, or search for "cam followers"

jeffcat · Sep 7, 2016

Just Google in "structural steel beam strength". Several charts pop up. You can get trollies from HF and Grangers. Just make sure it has roller bearings instead of bushings. Remember....no matter how big of a beam you get, it will flex a little in the middle. Sag. That is why hi way bridges have a slight arch to them. When you are running down the road take a look at an aluminum flat bed trailer. Looks as if it has an arched back like a cat. As you put more and more weight on it the trailer will flatten out.

dpendzic · Sep 7, 2016

that would be called a wide flanged beam and is designated a W 10X66---66 being the weight per foot
the dead load moment is 8,448 ftlb and the live load moment is 32,000 ftlb
the W 10X66 can carry 46,250 ftlb without being overstressed so it would be fine---although it may deflect a little

gene bender · Sep 7, 2016

Those are aeasy too find just look trolleys up they are adjustable for the h-beam.32ft span is a bunch check with your ins co before you go too far.

Stephen Newell · Sep 7, 2016

32' is a long span with that much weight. I would consult with an engineer before doing that. My guess is the beam will need to be closer to 16" to 18".

FBH44 · Sep 7, 2016

I built my barn with the loft floor joists resting on a 32' long, 8" x 14" I-beam out of a demolished Wal-Mart. Poured a concrete floor, however directly under the center, I poured a 2' x 2' diagonal concrete pad, about 18" thick. I can pput a center post under there, or a jack-post, and brace up the center real good if I need to. Never have yet, tho. The ends of the beam rest on 6" steel columnms, with diagonal 6" steel bracing posts at 45 degrees. Stood real solid at the tornado several years ago.

Dutchman · Sep 7, 2016

That sure is a long span .. What I did in my shop is I have a 2" square tube that's 1/4 thick .. I have it as a trolley ... meaning it is on the beam and hanging DOWN ..with as big as bolt I could find , the nut welded on the bottom of the tube ... when I want to pick something up ... I put this tube as close as I can and screw the bolt out so it's all tight .... that way your span is smaller ..

That's just my 2 cents ... it works for me ...... mark

WI Dan · Sep 7, 2016

Dutchman, it took me a minute to figure out what you were describing, but when I did, I liked it! It's a movable temporary jack post, dedicated to the beam.
How do you handle lateral deflection? Does it want to sway or bow sideways?

DLMKA · Sep 7, 2016

Simple shear and moment diagram. You'll need the dimensions of the beam to calculate your polar moment. That will get you to whether or not it's strong enough, don't want to get to half your yield strength on beam. Deflection is a little more involved and will depend on how it's mounted.

george md · Sep 7, 2016

12 inch telfur rail will carry you load ,a 10 x10 is an H beam

and not a wide flange beam. Section modulus on the 10 in will

be much higher than the 12 in. Allowable deflection is

1/ 360 th of it's length . Do your calculations using 20K

as the tensil strength of the steel as that gives you a

3 to 1 safety factor.

george

dpendzic · Sep 7, 2016

Gee---my AISC steel handbook lists it as a W shape which is a wide flange beam. IT doesn't even list an H shape--it has HP shapes but none have 3/4 flanges

george md · Sep 7, 2016

Somewhere is my limited schooling there were , junior I,

standard I (tapered flange) , wide flange (CB sections)

flat flange , and h beams some times listed in the wide

flange section.

It's been 55 years since school and have not used it

much since.

george

dpendzic · Sep 8, 2016

George it is confusing----a lot of the designations have changed thru the years and some don't make sense. as of the late 70's the I beam designation became obsolete and is now called S shapes!
WF shapes are now called W shapes and the W 14 series are almost strictly used as columns.

Dan

JMS/.MN · Sep 8, 2016

I made my own wheels for the trolley by cutting down spindles from a
ford Pinto. Ended up with a final diameter of 5-6 inches. Rolls very nicely.

george md · Sep 8, 2016

Considering my schooling and books are from the early 60's

I have not seen the new listings . When I did the bridge

cranes for my shop (79 & 80) I used the books I had from

college,must have worked as they have not come down yet

and I have definitely overloaded them some.

The old shop is 2 bridges with 2 beams each ,12 in with

8 in channel turned down for rigidety in 30 ft wide building.

The big shop 15 in with 6 in channel on side ( 46 ft building).

The second one in the big shop is 18 in single rail on the

same side rails . also the 15 in one is two rails about 2 ft

apart , as are the ones in the old shop. The 12 in rails came

from FT Hollird and were rated 2tons (built 1918 ) , Used the

12in with stiffener that were side rails for sides . Used the

15in side rails the were in the 5 ton section for the 46 ft

bridge . Sides were on 24ft spans , so when I built the shop

I put all of the sides on 12ft centers.

george

Chain hoist beam?

tomstractorsandtoys

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IA Roy

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Dune Country

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jeffcat

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dpendzic

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gene bender

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FBH44

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