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Tool Talk Discussion Forum

I beam for shop floor need help

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Jpuleo

12-16-2005 10:11:41

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Im trying to estemate the cost of clear spaning 28ft in my shop with an I beam. Problem is I cant find a table for steel beams. Most wood beam manufactures post them. My total load is aprox. 1200lbs per lin. foot evenly over the span spread. Im getting something like a 6"x24" engineered wood beam. I would like to find out what size steel beam I need to see if its worth looking into further. I just cant seem to find a simple table anywhere. I know its sort of a tehnical question, but its premature to call and engineer and Ive spent 2 hours searching the iternet.
Any input would be great.
Thanks
Joe

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M.R.

12-17-2005 15:28:15

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Re: I beam for shop floor need help in reply to Jpuleo, 12-16-2005 10:11:41

http://www.engineersedge.com/Calulators_Online.htm

Engineers Edge

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Bartt

12-17-2005 06:48:38

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Re: I beam for shop floor need help in reply to Jpuleo, 12-16-2005 10:11:41

I installed a 34 foot I beam with a 21 inch web and 6 inches wide down center of my shop, with 12 inch lamenated joists about 24 inches on center going from side to side. I had a log loader come up and set it in the end wall pockets and put a steel jack under each end for extra safety. The Beam cost me $700.00 delivered. here in Northern Vermont. I love this setup, no posts to run into. Good Luck with your project.

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jpuleo

12-16-2005 19:53:46

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Re: I beam for shop floor need help in reply to Jpuleo, 12-16-2005 10:11:41

Thanks guys. Great help in both #'s and sources. I MADE A HUGE MISTAKE though! I figured the top floor load. That will be acrried by a center colum. So I actually need 970lbs. lin. foot and not 1200lbs. Im going to see if I can find a book.

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Handyman

12-16-2005 19:48:20

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Re: I beam for shop floor need help in reply to Jpuleo, 12-16-2005 10:11:41

try looking into prestressed concrete floor panels, might eliminate the need for a large beam

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Rauville

12-16-2005 19:09:29

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Re: I beam for shop floor need help in reply to Jpuleo, 12-16-2005 10:11:41

Do yourself a favor and a buy a used copy of the "AISC Manual Of Steel Construction".
I'm sure by checking on eBay you will find one available. You'll be surprised how much use you will get out of this information packed book...even if you're not a structural engineer!

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Cliff (VA)

12-16-2005 16:43:51

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Re: I beam for shop floor need help in reply to Jpuleo, 12-16-2005 10:11:41

I don't like sizing stuff over the internet, but I will tell you that I ran 28' clear span with 1200#/ft through BeamChek 2004 and it came up with W12x72 with over an inch of deflection and W18x119 with less than 1/3" deflection.

You need to verify this from some other source before you choose your beam. BeamChek is for sale online.

Good Luck!

Cliff (VA)

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Jpuleo

12-16-2005 14:58:54

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Re: I beam for shop floor need help in reply to Jpuleo, 12-16-2005 10:11:41

Well, I did that search and came up with nothing that was any help. I called my supplier and they said they can give me a quote on the I beam, but I need to give them a size first. Tom....As for why souch a heavyweight beam...Its carying a drive in workshop above a cellar, It will be full of tools and have 2" thick wood floors. It will also be carying a complete carpentry shop on the top floor. Can you tell me more about bar joists. Are they those thing thats look like trusses made from re-bar and light steel beams? Basicaly its a paln for 55x31 three story gambrel roof shop with the first floor being a walkout basement. I want to have just one center colum if possible rather than 3 or 4 if I use lumber. I have a sawmill cutting the 2"x12"x16' oak floor joists pretty cheep. It will be a great shop if I can have open floors.
Thanks
Joe

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VaTom

12-16-2005 18:55:11

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Re: I beam for shop floor need help in reply to Jpuleo, 12-16-2005 14:58:54

Hi Joe,

Those are bar joists, now it's rod and angle iron welded up. 28' is not a large span, but you'd need a few joists. For instance, a 28' 16K9 (16" tall) will give you 408 lbs/lin ft total load, including 220 live. Weighs 280 lbs, easy to place. Space them out and you can easily handle your shop, but they'd have to be below your floor joists.

What I'd do is forget the floor joists and use only bar joists. Nail or bolt your 2" floor to them. Powder actuated nailers work great. The secret of bar joists is to spread out your load. Take a look at most any commercial roof and you'll find them. Common, 'cause they're the cheapest way to go.

For our underground houses, 40' is an easy span with bar joists only 30" tall. That's for 300 psf total load with dirt cover. Yup, use a tractor on the roof. Great place to grow tomatoes.

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VaTom

12-16-2005 14:00:39

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Re: I beam for shop floor need help in reply to Jpuleo, 12-16-2005 10:11:41

Hi Jpuleo,

28' span, 1200 lbs/lin ft? 33,600 lbs? Mind if I ask what you're puttin' up there? That's one heck of a point load.

I do considerably more than that with steel bar joists, but not just one. Roof over my head is good for 480,000 lbs. Bar joists come in very competitively and are simple to place.

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BobMo

12-16-2005 13:17:22

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Re: I beam for shop floor need help in reply to Jpuleo, 12-16-2005 10:11:41

Check your machinery handbook or type into your search engine "Steel I beam loads". Bet you come up with something. Now isn't that easy.

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jerrycpp

12-16-2005 12:34:29

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Re: I beam for shop floor need help in reply to Jpuleo, 12-16-2005 10:11:41

Call your local steel supplier.

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