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athos
13th Mar 2018, 07:52 PM
hello, I'm a new user I'm Italian, I would like to build a jib crane for my personal needs, for my little garage, it should be high under hook 3 meters long boom 3.50 meters and a modest reach 500 kg is enough, empirically extracting data from tables, I chose a 4-meter high 100 mm HE beam as a pillar column, and a 120 mm x 3.50 meter long ipe boom.
I would have to make the hinge to tie the column to the arm would have advice, thanks, on the boom will flow a chain hoist with manual chain, thanks in advance to those who want to provide giusi suggestions, one last thing I could add a tubular column at the end with wheels to support the cantilever beam, lame gantry crane type? what do you think thanks for the attention look valuable tips to the next

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Theberylbloke
13th Mar 2018, 08:59 PM
Greetings Athos,

Welcome to the forum.

I have two cranes in my workshop, and possibly two more to build. My advice is to get an engineer to design this for you. If something goes wrong with a crane the result is usually bad. In my view it is not worth the risk of personal injury or damage to equipment versus the dollars I might save by doing the job myself versus paying an engineeer.

To me, none of the pictures contain anywhere near enough useable engineering data. I realise a couple of them are concepts.

An alternative might be to look around for a second hand crane that suits your purposes?

Cheers

The Beryl Bloke

KBs PensNmore
13th Mar 2018, 11:16 PM
Hi and welcome to the Forum, Athos
As The beryl Bloke said get advice from an engineer. Even though it's in your work space, if someone was to enter it and get injured, your insurance company possibly wouldn't pay damages to the injured party, leaving you to pay, what could possibly be several million Euros!!
Even if you ban people coming in there, what happens if you sell it and the next person gets injured, you are still liable!!
NO ONE on here will say go a head and make it, as it would then leave them liable.
I found this on our Ebay in Australia, you could possibly find something similar in your country?
https://www.ebay.com.au/itm/Liftex-1-Tonne-Gantry-Crane-Shipping-Aust-Wide/252636802587?hash=item3ad253ae1b:g:mWsAAOSwUMZanKsk
Hope this helps,
Kryn

athos
14th Mar 2018, 03:36 AM
grazie per i preziosi suggerimenti, in realtà la gru serve come dispositivo di sollevamento per il servizio, o quando è necessario sollevare lo scarico di oggetti pesanti su veicoli o mezzi di trasporto, se si scattano foto con disegni di progetti, magari per farsi un'idea, forse se io trova sul mercato una gru a cavalletto o una gru a bandiera o altro dispositivo adatto alle mie esigenze grazie ancora per avermi accolto tra di voi grazie
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Mike4
17th Mar 2018, 11:10 AM
Does anyone do anything without having first made sure that someone else can be blamed if it fails.

Nothing would ever be made or even designed .

When I sell my equipment if ever all lifting gear will be cut up so no demented fool can ever try to make life hard for me or others,
That includes the forklifts and cranes. They will be cut up with a plasma to render them useless.

There is way too much nanny state crap brought about by insurance companies and the "what if "brigade.

Michael

Grahame Collins
17th Mar 2018, 11:50 AM
Athos,
Please appreciate that any comments made here in our Metalwork Forum are generated by the very best of intentions.
Everybody would hope that whatever you decide works out the best for you. The last thing any of us would want is to learn of an accident.

While lifting apparatus designs are pretty constant, the manufacture, the standards and quality of manufacture can vary greatly from country to country.

We can only advise based on what our own experiences have been and our own knowledge.We have no idea of what legislation and regulations of your country apply to lifting equipment.

Contributors can be therefore cautious in about what they will say in a public forum such as this, in safety matters, particularly areas where people risk being injured severely due a failure of equipment which they themselves, may have advised on.

Grahame

Grahame Collins
17th Mar 2018, 11:51 AM
grazie per i preziosi suggerimenti, in realtà la gru serve come dispositivo di sollevamento per il servizio, o quando è necessario sollevare lo scarico di oggetti pesanti su veicoli o mezzi di trasporto, se si scattano foto con disegni di progetti, magari per farsi un'idea, forse se io trova sul mercato una gru a cavalletto o una gru a bandiera o altro dispositivo adatto alle mie esigenze grazie ancora per avermi accolto tra di voi grazie
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thanks for the valuable suggestions, in reality the crane serves as a lifting device for the service, or when it is necessary to lift the discharge of heavy objects on vehicles or means of transport, if you take pictures with drawings of projects, maybe to get a idea, maybe if I find on the market a gantry crane or a jib crane or other device suitable for my needs thanks again for welcoming me among you thanks

Googled translation

Grahame

Grahame Collins
17th Mar 2018, 01:13 PM
There is way too much nanny state crap brought about by insurance companies and the "what if "brigade.

Agreed, Michael

I too have in the past made lifting attachments for lightweight lifts up to a ton.Made for my own personal use only, they affect no one else but me if there is a failure. I have the knowledge and experience to be able do this.

I believe a lot of the bureaucratic overkill we see is brought about because those people who don't know what they are doing and don't actually recognise they are the ones who don't know what they are doing. "Hold my beer and watch this"

Our members who frequent the trailer section will already have a grasp of this notion. They will, of course, have made searches of trailer fails and welding fails . There are endless examples of those trailers ,hitch gear, etc made without the slightest knowledge or even forethought about the potential serious impact of their work upon them or others. The don't knowers seem to be a group growing exponnetially.

Hence the legislation concerning DIY trailer building in our own country was upgraded and rightly so.

It follows for electrical and other similar topics.

It is just an opinion for whatever it is worth.

Grahame

athos
17th Mar 2018, 05:00 PM
grazie per i vostri messaggi e preziosi consigli, voglio sottolineare che questi dispositivi li useranno solo me sotto la mia responsabilità, quindi se collassano, sarei coinvolto in prima persona, non ho una società in cui lavorano lavoratori stranieri in caso di collasso o incidenti si verifichino incidenti o incidenti di lavoro premesso questo credo che la gru a portale sia più stabile mentre la gru a bandiera più pericolosa, poiché il carico sollecita il braccio a sbalzo come in una struttura a sbalzo, sono attrezzato per costruirli saldatore e altri strumenti, per costruire gru a bandiera avrei bisogno di un tornitore per costruire le cerniere della cerniera, il perno può recuperare da un grosso bullone, se non chiedo troppo, potresti attaccare le foto delle tue gru, solo per rendermene conto, grazie tu di nuovo il tuo prezioso intervento farò certamente tesoro di saluti athos

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Translation

thanks for your messages and valuable advice, I want to emphasize that these devices will use them only me under my responsibility, so if they collapse, I would be involved in the first person, I do not have a company where foreign workers work in case of collapse or accidents occur accidents or accidents of work premise this I believe that the gantry crane is more stable while the most dangerous jib crane, since the load stresses the cantilever arm as in a cantilevered structure, are equipped to build them welder and other tools, to build jib crane I would need a turner to build the hinges of the hinge, the pin can recover from a large bolt, if I do not ask too much, you could attack (attach?) the photos of your crane, just to realize it, thank you again your precious intervention I will certainly treasure athos greetings.

Grahame

athos
17th Mar 2018, 05:03 PM
you could attach photos to your cranes, pounds owns thanks I would like to use them to get inspiration if I can

Grahame Collins
17th Mar 2018, 06:05 PM
Hi Athos,
Given a choice I would favour the first type of crane you showed.
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It could cover more of the work area than the other pivot types.Certainly, it is more costly and does pose more a more difficult task of building it, but it could allow an endless chain to be used to provide a horizontal motion,something,the others, cannot offer.

If single handed unloading from trucks I think it is most stable. The dimensions of the beams you seem to have already obtained from tables. If your fabrication and welding skills are good there is no reason you should not be able to build it yourself, bearing in mind the comments made above.

As an apprentice I used one of these moving gantries that could lift a ton without problems., I don't have any pictures to attach but other members may have. Please keep us up to date when you have something to show us.

Regards
Grahame

athos
18th Mar 2018, 04:30 AM
thanks for your messages and valuable advice, sorry if I took advantage of your patience, returning to my discussion I would add at the end of the cantilever beam a tubular pillar with wheels to unload the load and weight of the cantilever type shelf structure, but I have to size everything or make a mix jib crane gantry crane hoyst, if you have other solutions I invite you to submit them to me thanks again sorry for the trouble I have caused you, thanks for your precious time

https://www.casellacarriponte.it/images/85-2-gru-a-bandiera-gru-a-colonna-e-gru-a-mensola-torino.jpg
https://www.casellacarriponte.it/images/40-1-gru-a-bandiera.jpg

Mike4
18th Mar 2018, 11:19 AM
Grahame,
I also know how to , but as you said the exponentially growing group of Youtube watchers who will build something and have the " dont need all that " attitude is the problem .

It makes it difficult for anyone who overengineers even to make simple supports for equipment .

Michael

athos
18th Mar 2018, 08:03 PM
I need to build this rudimentary structure for personal needs, I just have a shed I need to lift move load off heavy vehicles I have a welding machine and locksmith tools as a young man I was a worker in a blacksmith's shop I'm not a professional veteran but I cord with my small means thanks for the messages and the right advice

https://www.ford-trucks.com/forums/attachment.php?attachmentid=158979&stc=1&d=1473724699

http://racingcars.co/wp-content/uploads/2017/11/wall-mounted-jib-crane-stunning-overbraced-lw-abus-home-design-ideas-2.jpg
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Mike4
19th Mar 2018, 09:25 PM
athos
Welcome and I hope that your project does what you need .

There are quite a lot of designs available , I would speak to people who use which ever one you decide to make .

That is one way to get some ideas which could improve on commercially available units.

Good luck.
Michael

athos
20th Mar 2018, 04:49 AM
grazie ancora per i preziosi suggerimenti e la collaborazione, se c'erano amici che avevano creato una struttura simile ti invito a partecipare, non ho iniziato a realizzarlo come dovrei andare a un tornitore per farmi realizzare alcuni pezzi per il supporto perni la boccola da saldare sul braccio della trave, devo trovare grossi bulloni da cambiare per fare i perni di giunzione per fare i vincoli per la mensola, i supporti e altri componenti grazie ancora saluti alla prossima spero presto

https://i.ebayimg.com/00/s/MTAyNFg3Njg=/z/wyQAAOSwq1JZEu-Z/$_72.JPG

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Grahame Collins
20th Mar 2018, 09:19 AM
Hi Athos
I worked in a workshop that owned a hoist frame similar to the blue one shown. I suggest avoiding that design.

The small castor wheels are the Achilles heel of the unit. They must be large enough to get them to roll easily.

Our frame wheels were far too small, that had had no rolling bearings on the wheel axles.

In addition, the castor wheel "tires" should be hard enough resist the flattening under the load.The rubber castor wheel tires fitted to our frame were far too soft and resisted that inertia needed to roll the frame.

We had to use a crowbar to lever the frame to facilitate movement.We had a few people there and movement was still difficult.Moving such a frame alone will be difficult.

Using all large steel wheels with a ball bearing axle would make the frame easy to roll.

Grahame

Com_VC
21st Mar 2018, 06:17 PM
I agree with Grahame. If you do build that style you want some decent castor wheels on there, you can get them but they can get expensive.

Even my engine stand with steel wheels without bearings is a pain to move around when loaded. One day I will fit some decent ones to it.

Ropetangler
1st May 2018, 12:08 PM
I agree with Grahame. If you do build that style you want some decent castor wheels on there, you can get them but they can get expensive.

Even my engine stand with steel wheels without bearings is a pain to move around when loaded. One day I will fit some decent ones to it.
I too agree with the other comments made above, but a compromise might be to fit jacking bolts to the caster wheel positions, so that the gantry could be supported when actually lifting a load. This would relieve the wheels of high loading forces, but would prevent mobiling with a load. In my view that is not such a bad thing, as these smaller crane units are often pretty unsafe if used to carry a load anyway, and you always have the option of setting the load down, re-arranging the gantry and re-lifting the load, and shifting it along the beam. Obviously this is only a viable option if distances are short.
I would also like to make a comment on the gantry pictured above as Attachment 372518 (http://metalworkforums.com/attachment.php?attachmentid=372518). I think that the stays are a bit too short, one effect being to put more stress on the bottom plate under the column, rather than transferring the forces to the ends of the plate above the castors.

OxxAndBert
1st May 2018, 02:25 PM
I built a gantry similar to the blue one above. For wheels I used 6" metal wheeled casters. Unloaded it moves easily on flat concrete. Mine is also the variable height design and works well.
I'll comfortably move it around with light loads up to around 500kg, but anything above that I lower the load and move it with a pallet jack or skates then relocate the gantry for the next lift. Its not a comforting feeling if you get the load swinging on one of these while trying to bump it across the floor.
When relocating my lathe I had to negotiate a 100mm difference in floor heights, so I put one end of the gantry on each piece of floor and leveled the beam then rolled the load along the beam. The lathe is 1.2T and even with a decent girder trolley it didn't want to roll particularly easily. A girder trolley with a driven wheel and endless chain or similar would have been nice to move it along the beam with more control.

Steve

dodge at4
29th Jul 2018, 07:12 PM
you need to be very careful using jib cranes, i have seen many time myself, me included they can take awhile to get used to , more so when turning a large heavy item on the welding bench or on welding trestles, have seen jib cranes and jobs bouncing off walls back and forth.
they can run away by themselves if chains snatch, all part of learning keep hands feet well clear