jib crane???

[stubbysteve]

hey all this is my first "real" question...........lol


I am wanting to install a jib crane in the existing floor of my 480 sq ft shop. I mostly lift lawn mowers and sometimes a motorcycle engine here and there. I do not work on cars or big engines anymore so there isnt an worry of too much weight.

My welder buddy that is gona make the jib crane said that he wouldnt install it in an existing concrete floor cause the J bolts were usually put in the crete while it is still soft. But with me being handicaped I could really use one. I do not need the up and down boom just a straight boom that I can swing from side to side with a I beam for my 110 volt wench to slide back and forth on.

My welder buddy also said that since my concrete floor is cracked to hell and back he definately would not install one. in fear of the whole chunk of concrete pulling out of the floor. With this said he said if it must go in the shop, which it does, he would cut a 2 ft square hole in the existing concrete and make it 5ft deep so that a piece of pipe with rebar welded to the side like a porkupine could be concreted back into the floor so there was no worry of it pulling out of the floor.

My question now is, My floor has a lip that goes all around the 4 walls, which is like 6in tall. I plan on staying away from the lip about a foot or so, then doing the 2 ft x 2ft hole. is there such a way of doing this with out the lip trying to crack and crumble cause that is what my walls are on.?

I can get a pic in a day or so if anyone needs. and I am open to suggestions on how to do this properly. with the exceptions of pouring a whole new floor....lol or using a cherry/engine picker cause they take up too much space.

 

[cyamaha2007]

If i understand you the lip is the footing. It shouldnt crumble on you. Cut your hole then epoxy rebar suds to the old slab. This will tie the new crete to the old.

 

[stubbysteve]

yes the lip is a raised footing. Do you think the jib would hold good put in this way??? thanks.

 

[kwb]

If the post can be within ~6' of a corner rethink the need for it to be freestanding. If you can tie the top of the post to the top plates of your building it changes the anchor loads considerably and you don't need to have a pit dug

 

[stubbysteve]

see the thing with that is my OHD. And I need it on that side cause that is where I pull the mowers in.

Also can someone explain the best way to cut the concrete square? I am a simpleton when it comes to concrete and broke as hell too. I can probably get someone in here with a crete saw but I dont know how deep the crete is. it was poured I would say back in 1959 as was the time the house was built. I dont know if 6in was standard back then for a garage floor or if it is 4 in thick.

 

[kwb]

Your door is not a problem - the arm of the jib is setup to be just under the track. Mine is about 6' from the corner and reach is 14' so it will actually swing outside of the door when open.

I have done another that was only a couple feet out from corner and it gets outside as well - just not as far.

Pictures and dimensions would be very helpful.

 

[stubbysteve]

I dont have the crane built yet. But the problem I see with attaching it to the celing above the door is using the crane with the door open. unless I am really over thinking this. I assume it would hang down below the door track.

 

[e-tek]

Ditto on the pics and dimensions

 

[Thedroid]

Attaching to a wall would also take a lot of stress from the base, as would making a large base plate.

 

[stubbysteve]

ok what do you want pics of? the floor and the celing? as said above the crane is not built yet.

But I do plan to have at least a 5 ft solid boom in a sideways triangle form. if that makes sence. on the ends of the boom there would be 2 round colars that would slip over the freestanding pole with a stopper on the pole so the boom couldnt slip down the pole.

 

[stubbysteve]

this link shows how the jib would be made. the bottom part would be the 5 ft.

http://www.pnnl.gov/contracts/hoist_rigging/hoists_jibcranes.asp

almost bottom of page figure 2-3 says wall mounted. but would be freestanding or pedistal mount.

 

[cyamaha2007]

Concrete cutting is a pain. It will hurt your back so maybe hire that out. I use a gas powered concrete saw. I have seen it done with a worm drive skill saw. After you cut the concrete out get a set of post hole diggers and go to town. A bobcat with auger would be great but it could get pricey probably 300 bucks or so.

 

[BD1]

what about something like this ?
http://www.bing.com/images/search?q...668A256E1AB0055D5015C6619F983F0E07A55&first=1
Build it your way, place where you want it, frame with wood, and pour concrete.

 

[cyamaha2007]

^^^ I had one just like that and hated it. The arm was too short and the large base limited you on what you could lift. Also when the the base is under ground it would have to displace all the soil around it to pull out. Here all it has to do is tip over.

 

[ford33]

Must it be a jib crane? From your description you lift lawn mowers and a motorcycle engines which are not that heavy relative to other items. A jib crane soounds like overkill. How about using a hydraulic lift table. They are inexpensive and portable and can lift 700+ lbs and they are on wheels. They can be as low as 9 inches or so from the floor so a wooden ramp could help get items rolled onto the table and then jack the table up to your working height. Here are some links to lift tables.

Harbor freight $159
http://www.harborfreight.com/500-lb-capacity-hydraulic-lift-table-94822.html

Northern Tool $400
http://www.northerntool.com/shop/tools/product_7196_7196?cm_mmc=Google-pla-_-Material%20Handling-_-Lift%20Tables-_-143809&ci_sku=143809&ci_gpa=pla&ci_kw={keyword}

Another alternative is a scissor lift.

Just some suggestions.

 

[stubbysteve]

the lift table isnt going to lift a lawn mower. Nor is it going to lift a motorcycle. I have a motorcycle table lift with the wheel choch and all. I need the jib crane.

as for the comment about the crete saw and posthole diggers, that is what I am used to. I just got done with a complete privacy fence on the west side of my shop to conceal all my junk so it is sight un seen. I am also adding another section of privacy fence beside my attached garage. I dug 2 holes tonight. 3ft deep. all by hand. I have no problem with that.

back to the jib.

what do you all think is a reasonable price for someone to cut a 2ft by 2ft hole in my concrete floor????

 

[kwb]

http://www.bestjibcranes.com/
Look at the bottom of page with picture wall mounted mast.

Because most wood framed walls cannot handle the load you put in a post that you mount the jib to.
Then with the post you can tie to the top plates and trusses/floor for second floor to react loads across whole building and not locally to one part of the wall.

If you mount the mast to be lower than the door track it will swing under track.

 

[kwb]

^^^ I had one just like that and hated it. The arm was too short and the large base limited you on what you could lift. Also when the the base is under ground it would have to displace all the soil around it to pull out. Here all it has to do is tip over.

you will note that it says - fill with concrete. To tip it over you will be exceeding the rated capacity by a good amount.

The engineering on lifting devices isn't taken lightly.

 

[stubbysteve]

dont think that is gona work either. as I dont have metal frame work walls. just 2x4s and was built back in 59 and I would have to reinforce the walls I believe.

thanks for all the input fellas I think I know now how to get this done.

 

[camarotoolman]

They make lifts for lawn mowers, thats what you need. before I would go throw all the other bs, wht not not just buy a used motor cherry picker for cheap, thats what I use on my mowers.

 

[jamesemery728]

Here is something else to consider. How about a combination of two fairly simple devices. First, the new cherry picker engine hoists all fold up into a really small footprint. How about using a cherry picker to lift your mowers onto a lift table. Then use the lift table to get to mover up to a comfortable work height. Getting a project up to a comfortable working height will make a huge difference in your comfort level. There are some excellent lift tables out there, the only problem with most of them is they are 8" to 10" at their lowest position. So you use the cherry picker to put the mower up on the table, crank the table up and you are ready to go. The other advantage to the cherry picker is that it's on wheels so you can roll it out in the driveway to load and unload things into your truck.

 

[Rag Roc]

Have you considered a rolling Gantry crane with locking wheels?

 

[EOC_Jason]

As someone else mentioned, they do make engine hoists that fold up now and have a very small footprint when stored.

Alternatively, I don't know the height you want, but what about like a truck sized jib crane and just mount it to a large steel plate? Kind of the same concept as an engine hoist, but the plate will only be as thick as you decide to buy instead of the height of legs?

If you do go the traditional jib crane route, I wouldn't sink the whole post in the ground, I would just use the J type anchors and attach via a plate. That way if you ever move or don't need it anymore you can just cut the anchors flush with the ground.

 

[cyamaha2007]

I think you could get the floor cut by a cl guy for $150. For such a small area maybe you could use a angle grinder with a manary disk. Use it to score the crete and break it out with a sledge. Stick to your guns a jib crane will be best for the money. I dont have one at this shop but it wont be long till i build one or get one for it.

 

[stubbysteve]

look below.

 

[stubbysteve]

not sure how to do the multi quote but this is what I am gona try.

camarotoolman Re: jib crane???

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They make lifts for lawn mowers, thats what you need. before I would go throw all the other bs, wht not not just buy a used motor cherry picker for cheap, thats what I use on my mowers.

again a cherry picker takes up too much room. I can get several for cheap. just not what I want.


jamesemery728 Re: jib crane???

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Here is something else to consider. How about a combination of two fairly simple devices. First, the new cherry picker engine hoists all fold up into a really small footprint. How about using a cherry picker to lift your mowers onto a lift table. Then use the lift table to get to mover up to a comfortable work height. Getting a project up to a comfortable working height will make a huge difference in your comfort level. There are some excellent lift tables out there, the only problem with most of them is they are 8" to 10" at their lowest position. So you use the cherry picker to put the mower up on the table, crank the table up and you are ready to go. The other advantage to the cherry picker is that it's on wheels so you can roll it out in the driveway to load and unload things into your truck.

again not trying to be a **** which I do understand your idea, but I have limited space and have to get rid of so much stuff now just to have room to get around in the shop. But a cherry picker isnt gona do what I need to do. Also I dont want to pick up the whole mower just the front end so I can change/sharpen blades, change tires etc. I have a motorcycle table lift, I am gona extend the sides of it so I can put riding mowers, 4 wheelers, etc on it. As for moving a cherry picker around on my drive way, that works like trying to pour out cold molassis.........lol I couldnt even do that good when I had legs........lol

Rag Roc Re: jib crane???

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Have you considered a rolling Gantry crane with locking wheels?

I have no idea what that is I will look into it. thanks.

EOC_Jason Re: jib crane???

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As someone else mentioned, they do make engine hoists that fold up now and have a very small footprint when stored.

Alternatively, I don't know the height you want, but what about like a truck sized jib crane and just mount it to a large steel plate? Kind of the same concept as an engine hoist, but the plate will only be as thick as you decide to buy instead of the height of legs?

If you do go the traditional jib crane route, I wouldn't sink the whole post in the ground, I would just use the J type anchors and attach via a plate. That way if you ever move or don't need it anymore you can just cut the anchors flush with the ground.

I dont think I could do as much with a truck jib crane as I could with the full size one. which I can have the full size one made for less money than buying a truck size one. And as for the moving thing, I wont ever move from here unless the house or something burns to the ground. And only the bottom section of pipe will be in the ground. another piece will go into it.

cyamaha2007 Re: jib crane???

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I think you could get the floor cut by a cl guy for $150. For such a small area maybe you could use a angle grinder with a manary disk. Use it to score the crete and break it out with a sledge. Stick to your guns a jib crane will be best for the money. I dont have one at this shop but it wont be long till i build one or get one for it.

thanks for the input, that is what I was looking for on how to cut the concrete. I dont know about the angle grinder part as I dont know how deep the crete is. or are you saying as long as I score it good it wont break out past the score??? Cause if I can do it with the angle grinder I will cause I am on a limited income and it goes to pay my bills rather than build up my shop. And my welder buddy works with me as he knows I am on a limited income, I have owed him 70 dollars for like 4 months and every month I let him know whats going on and he says he knows where I live at if he wants to come break my legs.................lol he isnt worried about. plus I work on his mowers just for the price of parts and such. thanks again.