What size beam do I need?

admin

I am wanting to put a beam in my shop that I am currently building that would span 50' to carry a 5 ton hoist.  I would like the beam to be able to support the max load of my hoist.  What size/weight beam would a need to span the 50' and support 10,000 pounds in the center?  Any help would be greatly appreciated!
Reply:I'd put that kind of liability on a Engineer.
Reply:That's a long span with a big hoist. There ie a thread in math and layout that may help http://weldingweb.com/vbb/showthread.php...-I-Beam-Sizing
Reply:That sounds like a bridge setup to me. Get estimates from suppliers and see what they say . How much floor to ceiling height ? Here, pick one.    http://www.bing.com/images/search?q=...rane&FORM=IGREhttp://www.lkgoodwin.com/more_info/s...th_hoist.shtmlLast edited by BD1; 01-11-2014 at 11:43 AM.
Reply:Yeah, 10,000 pounds on a 50 foot span supported only at each end of the span is definitely going to need an engineered system.You may have it pictured in your mind of using a single beam, but realistically, it will take a very "tall" beam to accommodate 5 tons without offensive sagging in the center of span.An engineered system would probably use a fabricated truss instead of a single beam for a 50 foot span.
Reply:Smallest beam my chart in my structures book lists for 50' is a W 27x84 listed at 52' span. For a 48' span they do list a W 24x76 though. The 1st beam alone is going to weigh close to 2 1/2 ton and 50' is an awful long beam to put on a truck. I'm not surprised at the beam size. To span that long a length and not deflect, you are going to need a huge depth to the beam if it's unsupported..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:Yeah I figured this was going to be an ordeal!!  It would be a 15' floor to ceiling height.
Reply:What about a gantry ? http://www.wallacecranes.com/tricombo.htm ,  http://www.wallacecranes.com/thrftste_fixed.htmWhat do you plan on using it for ?  You may have to go HIGHER then 15' or cut down on capacity. Maybe beef up concrete thickness in a few spots and consider a portable stiff leg ? Like a column on wheels with a hydraulic jack setup.
Reply:Yeah, I'm toying with the gantry route.  Beginning to think that may be my best/cheapest route.
Reply:a truss type beam may be some thing to be considered,
Reply:I sure hope those two columns have a huge concrete footing underneath them!
Reply:How about a bridge gurter, 50' is a good span with 5 tons in the middel, and a nice hard mix in the concrete.
Reply:What about bridging running down the top of a smaller beam? Kinda like a bar joist.Miller trailblazer301gLincoln sa200Miller251Miller spectrum 625Victor oxy-acc2002 Chevy duramax 3500 dually 4x4
Reply:This is what I've got in my shop. http://www.emhcranes.com/emhSingleGi...anes/elv-5.pdfProverbs 4:23My company welds.
Reply:Originally Posted by BlackbeardWhat about bridging running down the top of a smaller beam? Kinda like a bar joist.
Reply:Way more money than you probably want to spend, your also going to need some pretty good sized footings under the columns, at least 4' deep with rebar. probably be 1" or larger anchor bolts buried at least 18" into the concrete. Going to need an engineer which will cost you at least $500 for him to tell you what you need.
Reply:Originally Posted by DSWI'm not sure I understand your question. A bar joist is a truss. I'm not sure I understand what you mean by "bridging" in this instance.Anything "trussed" would need to be designed by and engineer.
Reply:Don't quote me on this but by using info from http://www.engineeringtoolbox.com/am...ms-d_1319.htmlAnd using it in this caculatorhttp://www.engineeringtoolbox.com/be...on-d_1312.htmlA W27x84 beam at 50' (600") can have a maximum deflection of 1" in a crane girder applicationUsing the calculator a W27x84 beam spanning 50ft can support 18,300lbs at 1" of deflection. Now this is assuming that the beam is properly supported at both ends, no lateral load (or beam is fully supported laterally), and the posts can support the load of everything. The beam will weigh 4200+ lbs by itself and add that to max load of 18,300 you're looking at posts that can handle about 12,000lbs a piece.
Reply:"Discovery is to see what everybody else has seen, and to think what nobody else has thought" - Albert Szent-Gyorgyi
Reply:I would most definitely build a truss type system on top of the beam to help transfer load out and help with sag.
Reply:Also the weight of beam it's self is gonna be crazy you will have to pour some type of footer with rebar or drive your piles deep to hold the weight and to really know how deep you have to go for the ground to hold the weight u will have to core the spot and have it tested hate to see ya buy all the stuff and pay a crane to sent it and in sink 3 ft after the first hard rain
Reply:The h pile we are driving right now has 6 per column and have to hold 250000 tons per h pile so each column has to hold 1.5 million tons.
Reply:You guys do know the original question is from almost a year ago right?.No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan