Extreme Gantry Crane Testing

[@youpattube1]

You convinced me. Stout. Rigid. Safe. One thing about all the comments, it shows that a lot of people are interested in what you are doing.

[@StarGazer0270]

Outstanding quality work and load testing is over the top!

[@lewiemcneely9143]

Some people can tear up anything but if they come apart it won't be YOUR fault. I never had a doubt they'd work. 10/4 on the wag off!

[@algerc.5492]

Great job Brian , "The One Man Steel Fab Shop", no matter how much equipment you have, doing that alone is amazing.

[@robertpanter5576]

Another great video, thanks Brian,when all is said and done YOU are an engineer and the sceptics are not.So don't bother listening to them.Have good new year.

[@AmateurRedneckWorkshop]

I am certainly satisfied that you have met and exceeded the requirements.

[@funkinflugen]

Once you defeat the naysayers with proof of concept/ worst case scenarios, then they'll complain about running a tractor in an enclosed area. Nice build Brian.

[@colin8653]

There are always armchair engineers that they think they know better but at the end of the day the prof is in the puding it did what it needed to do and a hole lot more good stuff Brian

[@lwilton]

I believe that safety regulations state that when towing an overloaded gantry crane through a rough blacktop parking lot at up to 25 MPH with a half-ton or larger pickup truck, you need to put a bungee cord or 1/4" rope between the bottom of the two legs to reduce the amount of spread.

[@paulcopeland9035]

Plus wear a hardhat, eye protection, and a protective cup.

[@bcbloc02]

Do you tow it brakes on or off? lol

[@lwilton]

Front brakes off, rear brakes on. Gotta keep some drag so it doesn't spin on you. :-)

[@royreynolds108]

@@lwilton Also make sure the driver is properly belted(or bolted) in for safety.

[@harbermachineworks3927]

Don't think I'd be affraid of using it!!! Good work in my book!!

[@Michael-he7xn]

Well built Brian! I was so nervous I did a fast-forward to the end to make sure you and Bailey were okay. *PHEW!!!* Happy New Year guys!

[@bcbloc02]

Happy new Year to you too!

[@ecrusch]

The vast majority of your audience knows that you know what you are doing. Me included. Give Bailey a pet for me. Eric

[@rickbrandt9559]

Having followed from the start of this old barn to shop, & visited/met you, I Have NO Doubt!!!!.

[@bulldozer7656]

Brian, I totally believed you on the first test video... You can't make everyone happy. Great job proving it out.

[@raedwulfone]

It exceeds the rating ,fantastic ...If they cant comprehend that ...Then they have to overbuild it.....As long as they do that with their own funds then; they are truly the saints they profess to be! Great Video Brian ....

[@glennmoreland6457]

Hi Brian... Them bits of box forming the base of them triangles... If you drill through for a drop in pin... Then you could slide some smaller legs of box in there... Use that to pair up these gantrys...👍 Just a thought... With thanks Glenn GLMelectrical Leeds UK

[@mattbentley8958]

I put 6750 on the gantry crane I made. The casters didn't like, I had to use a large wrench and crow bar to turn and move the casters. After I took the load off they are just fine. The 1200 lb casters are the weak point.

[@stevengarner3479]

Howdy Brian, from what I can see the weakest point of the rig is the pivot on the casters, but they held up to the stress with flying colors. Happy New Year to you and Bailey.

[@bcbloc02]

Yep casters should go first.

[@millomweb]

I think some angle brackets are needed at the top corners - triangular fillets ? with sides the same as the pieces you have up there already.

[@SolidRockMachineShopInc]

Nice job Brian. That diffidently was some extreme testing. Steve

[@bcbloc02]

Got to be sure they are safe! :-)

[@bcbloc02]

@540 MUDSTAIN Well seeing as how those codes say they are for top running and this is a bottom slung setup I guess they do not.

[@bcbloc02]

@540 MUDSTAIN I looked at the codes and it is for cranes like the one in my shop. I could not find any references to this portable style. It is most closely represented by ASME b30.17 however most of what is in those codes applies to the hoist part itself. I only supplied a steel structure with a load rating there was no hoist mechanism involved. The structure was tested as per the codes with 125% + load on all possible positions and it passed. This is in accordance with OSHA 1910.179. It will be up to the customer to install their proper sized hoists and be sure that they meet the crane requirements as I did not provide them a crane, only a structure.

[@dalegriggs5392]

If Bailey approves it upon his intricate inspection, it’s good to go! My shop foreman is a full size Dachshund. I always hear the Germans were best in all matters steel so I hired one. Thing is all he does is pull his filthy blanket as close to the heat source as possible and sleeps the day away. Must have gotten “Americanized” somewhere along the way. Great job Brian! You have the same mentality as my dad. No matter what it was if someone wanted a job done he was willing to tackle it. Of course he drug me into some pretty compromising predicaments on occasion.

[@bcbloc02]

No lazy sleeping Americans here!! Maybe Baily is part German. lol

[@dalegriggs5392]

None here either Brian but I am sometimes amazed at the lack of work ethic in some, not all, of younger generations. The best we can do is set good examples. I learned early on if I wanted something I had to work to get it. My parents gave no allowance except a place to sleep and food on the table. Even working for my dad in his many business endeavors over the years I earned no wage. It was just expected of us and we had no complaints.

[@AD4MRick]

The trolls make those kinds of comments because they want to see you break something or get hurt yourself. That is sick and they should be ashamed but we all know they are not of that character. You did a great job on those builds and the client will agree. R

[@jerhalco]

I do some machine work in my shop. The work is not the quality of Brian’s. I at one time thought of uploading videos until I saw some of the idiotic chatter some of these clowns put in the comments of Brian’s and also Abom’s U tube video’s. Its another case of keyboard genius.

[@ScoutCrafter]

Jerry- You are so right! One thing I have always found is that 99% of all the "experts" that always find something wrong have no content on their channel... Go figure! =)

[@jasincolegrove6651]

ScoutCrafter that doesn’t negate good advice. Honestly, if the title of the video says ‘don’t do this’ there must be a reason. By his own admission some of the advice in his previous video was good advice.

[@63256325N]

Nicely built! I'd say they're up to the task. Thanks for the video.

[@ericcorse]

That main beam isn't even flexing I believe you are good to go.

[@davidfraser4830]

Brian great job as usual

[@weshowe51]

Farmers are hardworking resourceful individuals. But that has to be the strangest farm-wagon I ever saw. :) I've enjoyed the tests, even though I never had any doubts it would hold 2 tons.

[@Rebar77_real]

Would the top of the pedestals not benefit from a gusset for the top plate? Sorry if this has already been answered guys. I guess the wheels would crush before the welds gave out, heh heh.

[@broncota2210]

Didn't do the" drop" test like that guy with the big drill?

[@karlhrdylicka]

It's unfortunate that Brian will always get constant reminders of that unexpected accident and how lucky he was to avoid being seriously injured .

[@caseyc870]

I learned a very valuable lesson about cables when he shared that video!

[@mrblack61]

@@caseyc870 Same here, im glad Brian had the balls to put it up. There was so much armchair slagging off over that video, like it was the first cable to have ever broken. Glad he came out ok, could have been much worse. ☺

[@mrblack61]

@@karlhrdylicka Yeah but the reminders only come from the keyboard experts. The same folks who would have liked to see the gantrys fail. So it doesn't count to a man with an ounce of quality. 👍😊

[@timothydagesse8829]

Is there anyway we can get a blueprint of some sort for this gantry crane? I would like to have one in my shop similar to this.

[@unknownapprentice625]

Of course it works, its all vectors victor.... Nice build, way too much testing, and nice little additions to someone's shop!!! Thanks.

[@Opinionator52]

Excellent job Brian!!! The buyers have nothing to worry about... It will likely never be asked to do what you've just asked of it! Happy New Year....... :o) O,,,

[@craxd1]

There is an old formula used by Whiting for crane girders, using deflection. It is to limit deflection to 0.001" of deflection per inch of span, or .012" per foot under full load. To counteract the deflection mid-span, on the bridge girders, they would camber them upwards to the equivalent amount, thus, under full load, the girders would sag, becoming level. However, you can look at the recommended girders in crane tables for kits, and find the correct girder.

[@bcbloc02]

How would they get the camber into the beams? Arched with a big hydraulic press?

[@craxd1]

bcbloc02: Yes. Many steel suppliers can do it, as do the larger crane manufacturers who build cranes using rolled sections, as they can install a press. Many times they need to straighten/camber long sections anyhow. The press has two hold-downs fixed to the floor, far apart, and a large jack in the middle. They also straighten/camber RR Car center sills this way. On cranes over ten tons, they generally build box beams, and they add the camber during fabrication. As an example, on a sixty-foot span, it is only about 3/8" camber, as the center span is 30 feet. You calculate the deflection at mid-span, and you have to use the total weight, beam + trolley/hoist + load. The Machinery's Handbook has the formulas for deflection using weight, and you can use a rolled section catalog to find a beam with the correct section modulus, like the old Bethlehem catalogs. This is why you find the trolly hard to move, because of the downward sag from the load, but of course, that was overloaded. To get the gantry to roll on the floor easier, you'll need larger diameter wheels, especially ones that the tires won't mash flat on the bottom under the weight. The book is titled Whiting Crane Handbook, but it is expensive if you can find a copy. They're out of print. They used to send them out free, which is where I received mine. There seems to be a copy on Scribd: www.scribd.com/document/103269401/Whiting-Crane-Handbook I think that you might be able to find the CMAA handbooks on Scribd also. For about a 20 foot span, the deflection should be about 1/8" at 10 feet in the center, and at a 10-foot span, about 1/16".

[@bcbloc02]

Max Deflection is .15" at 6000lb and .1" at rated load this is total system casters and all. The trolley has two wheels with bearings not very good which makes it not want to roll. I had never used the thing before as it is too small for any of the beams in my shop. With a good trolley it should roll fine. The crane is designed to be portable it is not designed to lift and haul loads. The track style is far superior if you want to try to move loads with one.

[@silvergts1998]

What castors did you use? What wall tickness on square tubing?

[@CapeCodCNC]

If that tractor has 500lbs of drawbar pull at 10' your putting 5Klbs trying to tear off the top! Great job Brian!

[@bcbloc02]

I am sure it will pull everybit if 500lbs.

[@CapeCodCNC]

@@bcbloc02 put that dynamometer on it and give it a tug....

[@Pavinsteelman]

Add trailer tongue jacks to take weight off casters ,, good to stabilize and keep from rolling.

[@patrickcolahan7499]

Brian, nice work. What about putting type of hitch or pintal that can be connected to either am for moving the heavies of loads around the shop?

[@bcbloc02]

You must have missed the point that it is a portable crane and never intended to be used to transport loads around. The video was to prove that despite the claims of many the cranes would not fail from the lack of a diagonal brace.

[@trevorparnell3735]

As long as Bailey gives his stamp of approval

[@onceuponatime9314]

well done brian great job

[@paulmaxwell4438]

Brian, somehow i'm getting visions of Wil E Coyote when you were shaking that load. Good test! Keep up the great videos.

[@donaldshulman6771]

hey Brian - Everything in the shop is super-sized and super weighted. I knew that the crane would pass the test! BTW, is there more work to do to complete the shop? If yes, what needs to be done?

[@bcbloc02]

Mainly I have to put the entire ceiling in and insulate it. Also I have to finish painting the outside and paint/seal the roof.

[@woodscreekworkshop9939]

Brian, I had sent you email, but must have gotten lost. What type of I bean did you use for the top piece? I am also looking for a design that can safely lift 6000 pounds. Can you share the beam dimensions? Thanks. Yuchol from Woods Creek Workshop

[@patcb829]

Excellent test, one of the previous videos critics. Happy New Year everyone.

[@randynewtonsr9659]

I didn’t even think of that , Thanks Brian!🤔🙂👍 yeah I get the liability thing, I’m one of those people that believes if you misuse something and you get hurt because if it, it’s your own dang fault!! I’m very cautious about using things correctly!!!👍

[@johnscarboroughregenerativ7240]

How do I do the math and find out how much my Gantry Crane should carry?

[@PittsS2C1]

Another great job. Thanks for sharing. By the way, on the idea of adding upper corner fillets... I suppose you could add strength and unrequested features “til the cows come home”. Clearly, the added strength is not needed. But, it might be useful to be able to pull from those locations in order to more precisely position a load sometime. Great job, as usual.

[@madmodifier]

Nice work sir! Looks like the JD 430 has a listed weight of 1170lbs.

[@bcbloc02]

+ add 370 for the deck!

[@jobos98]

If you zoom in on the image it has gussetts on both sides of the header beam. Im not trying to be a troll. I love watching you doing your projects 👍👍. All i am saying is it makes sense to provide lateral bracing on a gantry crane for rigidity & good practice.

[@chrischapel9165]

Brian , is there any truth to the rumors that the SHOP INSPECTOR is leaving and that the President has tapped him to be head of some department in his administration and that the Pres said he needs Bailey to get things done and drain the swamp?

[@bcbloc02]

Nope, inspector loves the shop and says he is staying.

[@chrischapel9165]

@@bcbloc02 as a viewer , i think i speak for fellow viewers that ,"we like the inspector" however as a American i was hoping to get a real butt kicker in D.C LOL...Great build my man...cant wait to see the monarch in there.

[@127069]

The only thing id done differently is plate the end of the beams to ease web load

[@G5Ckxew]

Brian, where do you find all of those massive machines?

[@bcbloc02]

In full scale machine shops. :-)

[@pierresgarage2687]

Next is the road test on small country roads, how much are licence plates for this in your part of the country, BTW, up to what speed is your little John Deed is gonna race it around...??? lol Here a good 2 tons "SkyHoock" would solve my space problems... ;)

[@BobSmith-cx4og]

Happy New Year Brian and everyone else!

[@rolliekelly6783]

Are you going to weld any load warnings on anywhere?

[@mattmanyam]

In the comments of the other video, yes.

[@phildeeds8238]

How about gussets up top? Wouldn't that help with the spreading of the side?

[@hisab-n8c]

Only one thing I like to add is a support foot "if " castors broke towing it around lol. Happy new year !

[@RG-gn1ln]

It might pass the load test, but do you have the the liability insurance to protect yourself if it would fail for some reason. If you don't have insurance then it would be advisible to get some when taking on jobs like that.

[@DLMachineWorks]

Brian great job as usualI was wondering what's the actual size and dimensions of the steel I know the crane is 10 by 10 what is the size of the raw steel thank you I am wanting to build one of these myself keep up the awesome work thanks again

[@dodcummins251]

David Loftis same here. Brian can you give details on the iron?

[@jjgag601]

Brian: Add me to the list i would love the dimensions of the steel. I never doubted your build from the beginning. Thanks for sharing

[@bcbloc02]

You likely can cipher thru the video and determine what the materials are, and I gave the cut dimensions. I am afraid to post the details because of liability as I don't want people to think this is a one size fits all kit. I would gladly build one for anybody that wants one. :-)

[@DLMachineWorks]

@@bcbloc02 I understand that thank you

[@jerryhale3499]

Happy new year Brian great job

[@electromechanicalstuff2602]

I would have made it out of unuptanium and used cryptonite hardware so incase superman wanted to use it as a boomerang it would hold. Come on people. The thing is stout!

[@MuffinMan0521]

What is that huge blue machine in the background?

[@bcbloc02]

You must be new to my channel. That is my radial arm drill, it has a whole series on here of its own.

[@metalworksmachineshop]

Works for me. The load test my work does . Is its max load plus 500lbs for 1 minute. Is the steel certified? I also build towers around grain legs, insted of using cables. And all the tubes need the be certified. It cost more .

[@alp6792]

How much would you charge to build a 12ft tall 10 wide 2 ton?

[@bcbloc02]

Hard to guess right now since material prices are all over the board and it literally took 2 months to get a set of casters I was supposed to have in 10 days. :-( Things are a huge mess right now and I suspect will just be getting worse. I would guess around $3500 but don't really know.

[@udowillkomm1173]

I´m convinced, i would buy one....

[@momobadilak]

how many lbs are the casters rated for?

[@jobos98]

They give it stability from having the legs bend from sideways loads. You are not supposed to move a loaded gantry crane anyway.

[@fowletm1992]

You've impressed those that need to be (customers and most of the veiwers) The rest don't know what they're looking at and don't understand it either

[@chrisstephens6673]

fowletm1992 there one group that will never be impressed, public, or product, liability insurance companies. God luv em , not!

[@fowletm1992]

@@chrisstephens6673 He is an engineer If he's filled in the paper work and done the sums the Insurance compamys don't give a crap if a lawn mower can drag it Untill someone does something stupid with it amd dies like drag it with a lawn mower Lol

[@ActiveAtom]

This is funny these videos I first thought this oven was smaller it is actually huge to us even though, does that or will that oven do your heat treating? Happy New Year.

[@bcbloc02]

Yes it is a heat tretaing oven for large parts. i can do a 6cyl diesel crankshaft in it.

[@johnballard3334]

Jd mower isn't putting out enough fuel smoke for the pulling test. Next project is to upgrade the fuel system and get some more HP.

[@bcbloc02]

Got plenty of HP it needs more traction!!!

[@johnballard3334]

@@bcbloc02 I just like to see the black smoke when the tires are spinning

[@1995jug]

We has one at work about like yours it ran on inverted angle iron track rolled good.

[@royreynolds108]

I know I commented in other places but I don't remember if you said whether the customer or you were going to paint them? Just curious.

[@bigdawgsbusa2]

Brian the inspector is good with it so em I. He did chime in for a sec then back out the bosses door job well done it passed all required specs per customer request. You can build me one any time I'll even come down from Indy and pick it up😎

[@bcbloc02]

Send me your specs and a check and I will get right on it! :-)

[@jerryglen986]

Bailey Approved! ⭐👍

[@thomasutley]

Brian, how will the gantries be marked to communicate their load rating to the users? Is that your responsibility? Or the new owner’s job to mark it? I’m asking both from a safety perspective for the users and the liability perspective for you. Nice job!

[@bcbloc02]

I stamped 4000lb max load on the top beams, they also will get painted with big letters marking such.

[@terry42481]

Any way you can give me a cut list for the hoist. Also the angles you cut for the support angle. Would be grateful.

[@bcbloc02]

You likely can cipher thru the video and determine what the materials are, and I gave the cut dimensions. I don't know the exact angles as I just leaned the braces against the post in position and then transfer scribed a line parallel to the foot and cut from that. I am afraid to post the details because of liability as I don't want people to think this is a one size fits all kit. I would gladly build one for anybody that wants one. :-)

[@terry42481]

Thanks

[@DS11416]

you need a small block and tackle and some Weldon eyes, Brian ?.

[@bcbloc02]

I likely could.

[@turbocobra]

seems as if you have fully demonstrated the load/capacity, very cool build! now just get them delivered and collect your $$

[@gorgoths_ethos]

Hey Brian, you willing to share plans on how you built those?

[@bcbloc02]

You likely can cipher thru the video and determine what the materials are, and I gave the cut dimensions. I am afraid to post the details because of liability as I don't want people to think this is a one size fits all kit. I would gladly build one for anybody that wants one. :-)

[@xenonram]

If you can't look at a paused frame of tree video and figure out the 2-3 materials needed, you should not attempt to build anything that carries a load.

[@dodcummins251]

Brian, that 430 makes you look small! I’ve got a hankering for one here lately..

[@bcbloc02]

For the right price this one could be yours! It even comes with my special tuning. :-)

[@wotnoturbo]

From what i recall static load testing was 25% over rated load and dynamic load testing 10% over rated load - looks like you passed both ;-}

[@caseyc870]

would you mind sharing the materials list for this build

[@bcbloc02]

You likely can cipher thru the video and determine what the materials are, and I gave the cut dimensions. I am afraid to post the details because of liability as I don't want people to think this is a one size fits all kit. I would gladly build one for anybody that wants one. :-)

[@xenonram]

I don't get people that all these kinds of questions. If you can't look at a single static picture of this, and write down the 2-3 materials needed, you should not attempt to build anything that carries a load.

[@jcs6347]

Good video Brian! May I ask where did you get the wheels from? Thanks!

[@bcbloc02]

ebay, I bought these in a lot, they didn't appear to have anymore.

[@jcs6347]

Thanks

[@barrygerbracht5077]

Were you disappointed that at the 4000lb+ loading, neither your trolley nor the wheels rolled well enough for you to push it by hand? The rubber Urethane tread wheel I can see being difficult, but the steel trolley wheels I would have thought to roll more easily. I suppose that is why they make geared trolleys. I have no experience using the trolleys so I don't know how hard it is the get them to roll in the first place. I'd just be bummed if I had built this for myself and then couldn't move the trolley (the only thing of that weight I could envisage picking up to move would be to reposition a bridgeport or lathe)

[@bcbloc02]

No Bridgeport weighs 5k I have ever seen. The bearings in the trolley I used are pretty stiff on 2 of the rollers so I am sure that didn't help. The crane isn't designed to be transported loaded so the urethane casters are probably a good thing! Main thing is they won't tear the finish off their smooth shop floor.

[@barrygerbracht5077]

@@bcbloc02 I was meaning that the only thing I might want to lift weighing more than probably 500-1,000 lb would be a mill/lathe. Most of the time it'd be things just heavier than I can comfortably and safely lift by hand (mill vice, rotary table, raw stock etc.).

[@millomweb]

So they'll safely lift 3 tons ?

[@bcbloc02]

That one was rated for 2 tons but has a factor of safety of well over 2 times so it can handle the 3 ton overload with no damage.

[@millomweb]

@@bcbloc02 Why didn't you put angle plates in the top corners to improve rigidity and reduce the risk of splaying the legs ?

[@bcbloc02]

@@millomweb customer spec was for clear internal span.

[@millomweb]

@@bcbloc02 That's a good response - but you could have advised against it - after all the trolleys don't cover the full width - they're what - 10-12" short at each end. That's the place I'd fit a triangle - so no further impact on trolley travel yet significant strengthening.

[@eleventeenmachine5991]

All the naysayers just wanted to see destruction. I've built a lot of stuff that looked like it wouldn't work. And yet it did. So as they say looks can be deceiving. You know what you built better than anyone else. And you know your welds. So if you're confident in your welds you don't have to worry.

[@Bigwingrider1800]

THE CHAIN FALL WILL NOT REACH THE ENDS. BESIDES 6 INCHES ON BOTH SIDES WILL NOT MAKE OR BREAK. WATCH THE VID WHEN PULLING ON THE ONE SIDE IT WAS BENDING.

[@yosmith1]

yeah, but did you test it in the vacuum of space? :) I knew the arm chair engineers would come out in force when I watched you build these things. Great stuff as always, Brian

[@bcbloc02]

I did but when I say Hey Guys Brian here in space nobody hears me!! lol

[@sectorxxivc7628]

How much are these ?

[@bcbloc02]

They vary with specifications but more than harbor freight but less than some of the Pro units.

[@chrisstephens6673]

He's not just an engineer he is a bl**dy miracle worker.👍

[@randynewtonsr9659]

Looks good and strong Brian!👍 I’m looking into building one of those soon, would you be able to come up with a material list ( if your ok with that) so I can see what I need to purchase, Thank You sir

[@bcbloc02]

You likely can cipher thru the video and determine what the materials are, and I gave the cut dimensions. I am afraid to post the details because of liability as I don't want people to think this is a one size fits all kit. I would gladly build one for anybody that wants one. :-)

[@mrfixitusa6165]

@@bcbloc02 smart reply! I can see some goofball buying cheap steel with a fraction of the load rating as this, and even if they follow your process identically, it fails with a fraction of the weight and they say it's your fault. Some folks really ARE zombies. They're walk-in, but they're pretty dadgum brain dead.😝😂🤣😂🤣

[@davidhamilton7628]

I know I wouldn't be scared to use it

[@jusb1066]

i agree the castors would be the first to fail, what is their rating? commercially made of course, which is all you can do to trust their rating and be way under it, static lift no issue, as you said before, not designed to drag across the floor loaded. whos painting it? they wont ever let you live down 'that' video will they?

[@bcbloc02]

1200lb each rated casters. Reality is they are hanging 2000lb rated harbor freight electric hoists off these things so they probably would give up first! lol

[@terrycannon570]

Happy New Year Brian. Please Machine Responsibly . lol

[@crusader777]

hey I'm a new one here to your channel , good videos here built me a crane similar to yours but mine is bolted to the shop floor , used a heavy 4 in I beam on mine 14 ft span and lifted a 6500 pound Dodge pickup with the dam thing and had no catastrophic events

[@bcbloc02]

Sitting flat on the floor makes it way more stable than having casters. but yeah it is more than enough for the job. :-)Welcome to the channel, I hope you enjoy!

[@jmwarden1]

Another project well done and Baily approved, what more could you want.

[@radardoug]

Wow, a mini tractor pull!

[@stevenmarsh7138]

No chance of a full pull with that tractor ;-)

[@bcbloc02]

It can still pull a lot more than I can!

[@norman7179]

It held up to the tests but I would have liked to see some diagonal bracing between the uprights and the horizontal load beam. That looks like the weakest point. Good luck !

[@bcbloc02]

The clamping nut is actually the weakest point.............. after the casters.

[@dudleycornman1624]

I thing you're good to go...

[@Bigwingrider1800]

NO GUSSETS IN THE I-BEAM SIDE. WILL HELP WITH RIGIDITY

[@bcbloc02]

Braces would be a waste and only limit the travel of the hoist on the beam even more. Many commercial gantrys also don't have the braces, the only time there is force in that joint needing a brace is if someone is dragging it sideways like they should not. www.beatonindustrial.com/overhead-bridge-crane/gantry-crane/