jib crane? concrete requirements?

zkdiesel · Feb 4, 2014

got one of these three jib cranes for free. boss got all three as a package deal, so I get the left over for free, which one I don't know yet.

they will be 11' or 13' at beam height, boom is 10 or 14' long depending on which one. plan on lifting 1000lbs at max height and length

assume I cant just simply bolt to concrete correct? my good concrete is high psi, 8" thick with lots of rebar, but still not adequate right? one section has a 12" deep collum of concrete with extra rebar, would that be adequate?
other part of shop where it realistically will wind up mounted is only 6" I know that wont work, so cut out a 4'x4' section and go down how far? 4' and use a sonic tube? if im at that point and use a sonic tube could I stick the concrete above ground to gain a 1 or 2' additional height if I wind up with the short one?
thanks

I figure cutting floor will be my best and safest option but don't even know where to start as far as diameter of cut section and how far down to go.

these pictures are not my location, just the storage bay at work

JOHNMAN · Feb 4, 2014

Depending on which one you end up with, contact the manufacturer. They will have the foundation specs that the jib crane requires. Those take HUGE footers in order to be safe.

It's the uplift caused by the cantilevered load, not the compressive strength of the concrete.

Good luck!

BD1 · Feb 4, 2014

This may help, did a quick search, http://www.lkgoodwin.com/more_info/...00lb_cap_aj360_free_standing_jib_cranes.shtml

A_Pmech · Feb 4, 2014

The manufacturer will have footing drawings.

The Gorbel manual I have suggests 6' square by 4' deep for a 1-ton crane with up to a 15' jib.

zkdiesel · Feb 5, 2014

Only one even has a manufacture on them, and that appears to be a local Chicago company that's long gone

These cranes are old. 40's, 50's 60's........

A_Pmech · Feb 5, 2014

zkdiesel said:
Only one even has a manufacture on them, and that appears to be a local Chicago company that's long gone

These cranes are old. 40's, 50's 60's........

Have a look at Gorbel's website. They have foundation plans you could probably copy.

readhead · Feb 5, 2014

We just removed a 2 ton Gorbel from a shop and it had a 5' cube of concrete under it with 1" anchor rods.
Check the web site for concrete specs.

rsanter · Feb 5, 2014

The size of the footing is based on several factors including soil type
Yes you can cast as a sailed pedestal no problem but that will also require either a deeper or wider footing
Just off the top of my head I can see you will not go down less than 4 feet with 6 feet Being more reasonable.
I would also want to have a rebar cage in that footing, which would be easy to make.
I would also dig out below the concrete a bit and vibrate the concrete in under there so there is a shelf that will have weight from the exsisting floor on it

Bob

Orionrising · Feb 8, 2014

concrete and rebar is cheap.

If you do have to go down more then waist high be sure to use proper shoring as that can be a good way to die depending on soils.

zkdiesel · May 25, 2014

got my crane home, painting it, full assembled it should clear heater tube by 1/2" yikes
leaving upright in spot I want to mount it for a week to make sure its not in a spot that is going to piss me off, but yet be usefull
if my location deems good a 4x4x5' hole being cut then concreted, and going to make baseplate top level with floor so its nicer

zkdiesel · May 29, 2014

since its going in the old part of shop floor that I didn't build it got cut and dug tonight. concrete their is only 6" with mesh, unlike the 8" and rebar in rest of shop.
long night, started cutting at 5:30 and my "mo" has been in the hole for 5 hours

sberry · May 29, 2014

I am late to this but, could have changed the design a little and not needed the hole?

HAY YOU · May 29, 2014

Looks like it will be a good addition to your shop. You mentioned it'll be close to your heater. Did you check if you had enough head room to put the boom on?

zkdiesel · May 29, 2014

HAY YOU said:
Looks like it will be a good addition to your shop. You mentioned it'll be close to your heater. Did you check if you had enough head room to put the boom on?

It clears heater an door when assembled
Sadly no I can't put head on with crane standing. We had crane laid down on ground yesturday, assembled it, and stood it back upright with boom on. Boom is on, and swung out above the loft with blocking currently supporting boom end up top. To mount it one guy on the boom, one guy is skidsteer and another to guide base will be required.
Don't think il get to Many friends to jump at the chance to "land the crane"

GreyOwl · May 29, 2014

Are you going to support the upper deck with the crane mast when all is done or put the support column back in?

zkdiesel · May 29, 2014

GreyOwl said:
Are you going to support the upper deck with the crane mast when all is done or put the support column back in?

don't know on that yet, but I guess you saw I sawed out my support column
probably gonna weld it back in, but over a foot and welded to the crane base I need to support the loft from underside as the side of loft there is sheetmetal as its a built in duck work ventilation in that section

rebar under plywood in this pic vertical made sure anchors cleared before throwing in concrete

NUTTSGT · May 29, 2014

It looks good but I remember when they put one in at the shop I used to work at, the hole was huge. IIRC the anchor bolts were about 3' long.

930dreamer · May 29, 2014

Looks good, who's specs did you go with?

zkdiesel · May 30, 2014

Those anchors are 20"
I built it to gorbel specs for a 1 ton with 3 more feet of reach than mine incase I decided to ever extend it a few feet
Hope to max lift 1500 with it at most. Gonna use it like a 1000lb crane most of the time

zkdiesel · Jun 1, 2014

bam!

fit with only one smack of the sledge hammer, as lining it up and dropping it on the anchors was rather difficult.

welded loft to crane to support the loft

sands35 · Jun 1, 2014

I have to ask - how much concrete did it take?

It would be awesome to have one of those!

NUTTSGT · Jun 1, 2014

It looks good and a great way to support the loft too.

bsg · Jun 1, 2014

sands35 said:
I have to ask - how much concrete did it take?

It would be awesome to have one of those!

I don't know about the OP, but the base for mine was 6' x 6' x 4' deep.
Mine had a rebar grid of 12" on centers and 3' J bolts.
My crane is 15' tall and has a reach of 15", the capacity is 1000 lbs..

These cranes need a lot of prep but are life savers.

I plan on putting a VFD on the hoist to control the lift and lowering speeds.

I will also add a motor for rotating the jib as well.

Kevin

zkdiesel · Jun 1, 2014

2 1/2 yards for crane base.

zkdiesel · Jun 14, 2014

used it for a few projects already. works awesome, loving my 120v 1 ton coffing hoistwish my beam was longer, but hey, free is hard to pass up

jib crane? concrete requirements?

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