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  • Jib Crane

    I want to build a small jib crane in my back yard that can haold 1ton I want it for unloading my welder when I need the truck for other things as well as unloading steel and such. The plan is to drill a deep hole and pore a cement base to mount the jib crane to. As for the designe of the crane I am open to ideas does anyone have pics of any or plans?
    Hobart Mega Arc 5040DD (with built in air compressor)
    MM Passport Plus with Q-gun
    O/A

    sold MM 251

    There are only 2 tools needed in a tool box. 1) Duct tape to fix any thing that moves that isn't supposed to. 2) WD40 to fix anything that doesn't move but should.

  • #2
    Try these for starters...

    http://www.bushman.com/prod_jcran.asp

    http://www.globalindustrial.com/gcs/...unt+Jib+Cranes

    Either should give you the specs and a clear enough picture to do the job. If not, type in jib crane mount on your search engine of choice. These were the first two that popped up.
    Last edited by WyoRoy; 09-18-2008, 12:45 AM.
    Miller 251...sold the spoolgun to DiverBill.
    Miller DialArc 250
    Lincoln PrecisionTig 275
    Hypertherm 900 plasma cutter
    Bridgeport "J" head mill...tooled up
    Jet 14 X 40 lathe...ditto
    South Bend 9" lathe...yeah, got the change gears too
    Logan 7" shaper
    Ellis 3000 band saw
    Hossfeld bender w/shopbuilt hyd.
    Victor Journeyman torch and gauges
    3 Gerstner boxes of mostly Starrett tools
    Lots of dust bunnies
    Too small of a shop at 40 X 59.

    Comment


    • #3
      go on northern tool and search item number 103143 this should give some sugestions on size of the jib and the verticle suport. As far as diging a hole goes I would reccomed renting a skidloader and auger with a bit at least 2 feet in diamiter an makesure you can drill at least 4 feet deep. I would set an I beam in this hole with a plate on top of it and bolt the crane to the plate with grade 8 bolts. THESE DEMESIONS ARE JUST THE MINUMUM THAT I WOULD USE IN THIS SITUATION. I AM NOT AN ENGINER,DO NOT QUOTE ME ON ANY OF THESE DIMENSIONS AS BEING SUFICENT.
      Have you thougt about an engine hoist?
      This is an automotive discussion forum that has some great infromation

      www.autobodytoolmart.com/shoptalk

      Comment


      • #4
        An engine hoist won't work for me I aready have one but the hight is not enought and you can't move a loaded engine crane on a back lawn
        Hobart Mega Arc 5040DD (with built in air compressor)
        MM Passport Plus with Q-gun
        O/A

        sold MM 251

        There are only 2 tools needed in a tool box. 1) Duct tape to fix any thing that moves that isn't supposed to. 2) WD40 to fix anything that doesn't move but should.

        Comment


        • #5
          You should be able to figure out what you need as far as specs and material on those two links I provided. I worked with a lot less when building one for DDA52...it isn't rocket science by any means.

          http://www.shopfloortalk.com/forums/...ight=jib+crane
          Miller 251...sold the spoolgun to DiverBill.
          Miller DialArc 250
          Lincoln PrecisionTig 275
          Hypertherm 900 plasma cutter
          Bridgeport "J" head mill...tooled up
          Jet 14 X 40 lathe...ditto
          South Bend 9" lathe...yeah, got the change gears too
          Logan 7" shaper
          Ellis 3000 band saw
          Hossfeld bender w/shopbuilt hyd.
          Victor Journeyman torch and gauges
          3 Gerstner boxes of mostly Starrett tools
          Lots of dust bunnies
          Too small of a shop at 40 X 59.

          Comment


          • #6
            Is this inside or outside?
            Does it have to swing? (pivot about the vertical axis)
            How far does it have to stick out?
            Does it have to be completely in the clear with one beam, or can it use a diagonal brace?
            Can you make ductile X-ray quality welds using a 7018 rod that you would trust your life with?

            Some may say that the following is overkill, but overhead lifting is no place to experiment because people don't stand a chance when heavy things drop on them from above.

            If this is for use at a business, it must comply with the following rules for cranes: http://www.osha.gov/pls/oshaweb/owad...ARDS&p_id=9830 which makes it basically a "forget about doing it yourself - you've got to buy one" situation.

            It would be wise to comply with those rules though because they save lives.

            You can make a very simple one that does not pivot by driving a steel beam into the ground to use as the vertical member. I'd assume that to unload a truck, you'll want the top to cantilever (stick out) about 6' from the piling.

            1 ton acting at a distance of 6 feet places a tremendous amount of torque on that piling. You'll have to talk to a Geotechnical engineer to see how deep to drive this beam. You'll want it protected from corrosion, so consider having it hot dip galvanized. If you want it to last a long time in problem soils, you'll need to attach a cathodic protection system (sacrificial zinc anode).

            Then you'll need to weld a cantilever beam to the piling. They should be the same section. You'll want to miter the beam so that web connects to web, inside flange connects to inside flange, and outside flange connects to outside flange. Or weld it square and weld a transverse stiffener across the web to connect both flanges. Prep for full penetration 60 degree V groove welds and weld it with baked E7018 rods.

            Sizing the steel: example
            For the rated load, you have a worst case concentrated live load of 2000lb at 6', which is a maximum shear of 2000lb and a maximum bending moment of 12,000 ft lb (12'k).

            Assuming the beam will weigh 400 lb and and act as a concentrated load at its center of mass (3' out) and have 400lb of gear attached to it acting at the end (6'), you have a dead load of 400*3+400*6=3,600 ft lb (3.6'k), and 800lb of shear.

            Using LRFD, I'd modify the live load factor to 2.0 to take impact into account, and leave the dead load factor at 1.2, thus...
            ultimate shear Vu is 2(2k)+1.2(.8k)=4,960lb
            ultimate moment Mu is 2(12k)+1.2(3.6k)=28.32'k

            Assume the piling projects from the ground 12'. the total unsupported length from the ground to the end of the crane is 18'. Using the steel manual, the following A992 wide flange beams that can support that bending moment over that unbraced distance:
            W10x22 10 1/8" deep, 1/4" web, 3/8" flanges
            W8x21 8 1/4" deep, 1/4" web, 3/8" flanges

            But these need to be checked to see of they can also carry the combined shear...
            Mu/φMn+Vu/φVn must be <1

            W10x22 φMn@Lb->18=41'k
            φVn=73.2k
            (28.32/41)+(4.96/73.2)=.758 OK

            W8x21 φMn@Lb->18=37'k
            φVn=62.1k
            (28.32/37)+(4.96/62.1)=.845 OK

            Either one will cost about $20 per foot. Galvanizing is about $0.60 per pound. Remember this is just a guide for the process. This might not work for you. Conditions at your location may vary, so it would be wise to consult a professional engineer. It's not really as much trouble as one would think.

            Whatever you do, don't ask a rocket scientist. 33% failure rate may be good enough for the space shuttle, but I wouldn't get under a crane with those odds!
            Last edited by Bodybagger; 09-20-2008, 03:43 AM.

            80% of failures are from 20% of causes
            Never compromise your principles today in the name of furthering them in the future.
            "All I ever wanted was an honest week's pay for an honest day's work." -Sgt. Bilko
            "We are generally better persuaded by reasons we discover ourselves than by those given to us by others." -Pascal
            "Since we cannot know all that there is to be known about anything, we ought to know a little about everything." -Pascal

            Comment


            • #7
              Well if you must build one yourself be very careful. I work on cranes for a living and there are a lot of "homemade" jobs out there that just plain suck and I'd be afraid to use it.
              Osha 1910.179 ONLY applies to cranes with a capacity over 6000 pounds. His one ton unit is not required to be inspected at all. But one ton will kill you just as fast a three.

              that said go with WyoRoy's design I'd certify that crane. Very well built. Finally someone that gives a darn about the quality of work they produce and the lives they may save by thinking through the job.
              Last edited by kcstott; 09-20-2008, 08:06 AM.
              Miller Syncrowave 200 W/Radiator 1A & water cooled torch
              Millermatic 252 on the wish list
              Bridgeport Mill W/ 2 axis CNC control
              South bend lathe 10LX40
              K.O. Lee surface grinder 6X18
              Over 20 years as a Machinist Toolmaker
              A TWO CAR garage full of tools and a fridge full of beer
              Auto shades are for rookies
              www.KLStottlemyer.com

              Comment


              • #8
                Originally posted by Bodybagger View Post




                Sizing the steel: example
                For the rated load, you have a worst case concentrated live load of 2000lb at 6', which is a maximum shear of 2000lb and a maximum bending moment of 12,000 ft lb (12'k).

                Assuming the beam will weigh 400 lb and and act as a concentrated load at its center of mass (3' out) and have 400lb of gear attached to it acting at the end (6'), you have a dead load of 400*3+400*6=3,600 ft lb (3.6'k), and 800lb of shear.
                The crane needs to support 125% of it's rated load where it will produce the most beam deflection OSHA 1910.179 ref ANSI B30.2 so it needs to support 2500 lb. at the end of the beam. It also needs to be built to a safety factor of at least 2:1. lifting equipment will have a safety factor of no less then 5:1 (that's automatic, all your chain slings and synthetic slings are rated correctly so long as they come from a reputable supplier)
                Miller Syncrowave 200 W/Radiator 1A & water cooled torch
                Millermatic 252 on the wish list
                Bridgeport Mill W/ 2 axis CNC control
                South bend lathe 10LX40
                K.O. Lee surface grinder 6X18
                Over 20 years as a Machinist Toolmaker
                A TWO CAR garage full of tools and a fridge full of beer
                Auto shades are for rookies
                www.KLStottlemyer.com

                Comment


                • #9
                  now we're talking this is the kind of info I have been looking for.I'll answer as many of your questions as I can. It is for home use In my back yard and is for unloading my welding skid from the truck for when I want to use the truck for just a truck.

                  The boom must be able to have about 180 degree swing.
                  The boom can have a brace on top of it extending to the verticle member(sorry if I am using the rong terms I am not a crane guy hense why I am asking for help )
                  I would like the boom to be about 12' hight (a little less will be ok if need be)
                  The verticle beam can extend higher than the boom but I don't want it to go to high I don't want the neighbers to have a problem with it.
                  And as far as the welding goes thats realy not a problem I trust my welds with my life and if i can't trust my welds then i realy need to quit my job
                  And before I forget I would like a boom length of 10'-12' as long s its long enough to unload the welder and any steel thats to heavy to lift by my self out of the truck then that will do.
                  Hobart Mega Arc 5040DD (with built in air compressor)
                  MM Passport Plus with Q-gun
                  O/A

                  sold MM 251

                  There are only 2 tools needed in a tool box. 1) Duct tape to fix any thing that moves that isn't supposed to. 2) WD40 to fix anything that doesn't move but should.

                  Comment


                  • #10
                    Did you ever even check out the link I posted in post #5? I believe Don or I gave most, if not all, the dimensions of the stock we used, prep for welding and installation. Sorry if it doesn't meet your design needs, but it would appear to be what you were looking for.
                    Miller 251...sold the spoolgun to DiverBill.
                    Miller DialArc 250
                    Lincoln PrecisionTig 275
                    Hypertherm 900 plasma cutter
                    Bridgeport "J" head mill...tooled up
                    Jet 14 X 40 lathe...ditto
                    South Bend 9" lathe...yeah, got the change gears too
                    Logan 7" shaper
                    Ellis 3000 band saw
                    Hossfeld bender w/shopbuilt hyd.
                    Victor Journeyman torch and gauges
                    3 Gerstner boxes of mostly Starrett tools
                    Lots of dust bunnies
                    Too small of a shop at 40 X 59.

                    Comment


                    • #11
                      Originally posted by WyoRoy View Post
                      Did you ever even check out the link I posted in post #5? I believe Don or I gave most, if not all, the dimensions of the stock we used, prep for welding and installation. Sorry if it doesn't meet your design needs, but it would appear to be what you were looking for.
                      The size of materiel for the upright was not given in that link and ifit was I oppoligize for not reading carefully enough. But yes that is wht I am looking to build. Just not attched to a wall.
                      Hobart Mega Arc 5040DD (with built in air compressor)
                      MM Passport Plus with Q-gun
                      O/A

                      sold MM 251

                      There are only 2 tools needed in a tool box. 1) Duct tape to fix any thing that moves that isn't supposed to. 2) WD40 to fix anything that doesn't move but should.

                      Comment


                      • #12
                        Post #14 on the second page of the thread.

                        Quote by Don:
                        "Idig, the column is a W12 and the beam is a W10. Column is beefier."

                        Best of luck on your build. I'm sure if you ask, Don would be forthcoming with the concrete details. He is a good concrete man.
                        Miller 251...sold the spoolgun to DiverBill.
                        Miller DialArc 250
                        Lincoln PrecisionTig 275
                        Hypertherm 900 plasma cutter
                        Bridgeport "J" head mill...tooled up
                        Jet 14 X 40 lathe...ditto
                        South Bend 9" lathe...yeah, got the change gears too
                        Logan 7" shaper
                        Ellis 3000 band saw
                        Hossfeld bender w/shopbuilt hyd.
                        Victor Journeyman torch and gauges
                        3 Gerstner boxes of mostly Starrett tools
                        Lots of dust bunnies
                        Too small of a shop at 40 X 59.

                        Comment


                        • #13
                          Verticle column is a W12x36, IIRC. It was left over from a job that was done in '92..bout time I quit hauling that sucker around. I can't complain about how this one came out. It works perfectly on all counts. Picks up and moves my welder skid easily.
                          Attached Files
                          Don


                          '06 Trailblazer 302
                          '06 12RC feeder
                          Super S-32P feeder

                          HH210 & DP3035 spool gun
                          Esab Multimaster 260
                          Esab Heliarc 252 AC/DC

                          Comment


                          • #14
                            Guess we got lucky Don. Sure would have hated boring those slugs on a 6" Craftsman/Atlas lathe and facing them on a '50s table top mill. Did Jimmie or any of those other Washington boys ever find Pilebuck?
                            Miller 251...sold the spoolgun to DiverBill.
                            Miller DialArc 250
                            Lincoln PrecisionTig 275
                            Hypertherm 900 plasma cutter
                            Bridgeport "J" head mill...tooled up
                            Jet 14 X 40 lathe...ditto
                            South Bend 9" lathe...yeah, got the change gears too
                            Logan 7" shaper
                            Ellis 3000 band saw
                            Hossfeld bender w/shopbuilt hyd.
                            Victor Journeyman torch and gauges
                            3 Gerstner boxes of mostly Starrett tools
                            Lots of dust bunnies
                            Too small of a shop at 40 X 59.

                            Comment


                            • #15
                              Nah....I prefer to think of it as a professionally planned and executed exercise. Luck was not a factor.



                              Not that I know of, Roy. Creep was posed to get by there maybe. Guess he's been busy.


                              My next crane will be a wall mount style.....all I-beam and no cable. Gonna be a one tonner, too. Still 16' out and 12ish high. Not enough room overhead for a cable system. With the reduced capacity, I might see about using sch 80 pipe with 3/8 plate top and bottom for swivels. I found a design somewhere..just need to refind it now. I'll post it on WA one day. No rush on it just now.
                              Don


                              '06 Trailblazer 302
                              '06 12RC feeder
                              Super S-32P feeder

                              HH210 & DP3035 spool gun
                              Esab Multimaster 260
                              Esab Heliarc 252 AC/DC

                              Comment

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