How to calculate bending capacity of steel plates

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3 жыл бұрын

Do you want to know how to calculate the bending capacity of a steel flat or plate? In this tutorial I show you how to use simple formulas to calculate the thickness required for steel flat or plate in bending. Using a fully worked example, we apply a load and work out how thick our steel plate needs to be to support a load.
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Пікірлер: 59

@TheLuminousOne 3 жыл бұрын

Thanks Robin - as ever; a certified legend !

@cfgman1 3 жыл бұрын

Excellent this is a real world problem explained in detail.

@vagautohaus4492 4 ай бұрын

brilliant, I've been looking for a formula that would give me this info for a while... and by sheer luck stumbled on this - subscribed! thanks :)

@je7098 2 ай бұрын

Excellent explanation, I actually understood it first time which makes this video unique, thanks.

@ToroMoto 3 жыл бұрын

These are very helpful examples. Thank you!

@RobindeJongh 3 жыл бұрын

You're very welcome!

@deltawatts 3 ай бұрын

when i started this video i knew it would be very good, best explanation

@ihub6407 2 жыл бұрын

Hi mr robin you have a wonderful explanation that made everything obvious for us, i have a simple question regarding the yield strength normally the yield strength measured by MPa so when you tried to be consistent you considered this step ?

@andrefe911 3 жыл бұрын

Thank you !! Just what i needed.

@RobindeJongh 3 жыл бұрын

Hi Andres. That's great - glad it helped!

@shohel1718 3 жыл бұрын

Owo sir you are so great thank you sir. From today i will be your best student. God bless you. Thank you sir what i looking for. I m going to subscribe you now.

@SouvikCivil 2 ай бұрын

Very Informative... Thank you...

@mr_hiray 3 жыл бұрын

wow... simply love it....

@py_tok5589 3 жыл бұрын

GOOD STUFF, thank you

@cfgman9176 Жыл бұрын

Excellent video ...the same principles can be applied to UB with bottom plate welded on ...commonly used in cavity walls..

@RobindeJongh Жыл бұрын

That would be a more complicated calculation to take into account buckling and torsion.

@RostonMathias 3 жыл бұрын

Awesome !!!

@PyrOSlaYR 2 күн бұрын

Excellent presentation, now how can we check the welding sufficiency in this case?

@zeeshot 3 жыл бұрын

Thanks for this. Really helpful. Can you advise how adding stiffeners increases the bending capacity?

@RobindeJongh 3 жыл бұрын

The plate would bend between the stiffeners, i.e. more like a simply supported beam than a cantilever.

@neilmenon8943 3 жыл бұрын

Just a head up any American Engineer, the Z here is S in the AISC steel manual.

@pradeepsharma6411 2 жыл бұрын

Can you tell it’s scientific name as in M= Moment ; Y= Yield strenght in the above problem

@sorour191 Жыл бұрын

great job i was searching for this formula but i have a little bit concern on it the aspect ratio between width and length not conedered on this for example plate 300 x 300mm is more stiff than 800 x 300 mm for same thickness for sure

@hoyeolhur8953 Жыл бұрын

I use this method for welded shelf angle design to estimate the size of the equal angle but it is not applicable when the angle is not welded to the support. Could you please do a design of an equal angle bolted to the support ? Thank you

@emokachi 6 ай бұрын

Thanks mate, 2 questions: 1) How do you calculate if the load is equally distributed? How do you calculate if the plate is supported from both sides? Thanks again..

@sudarshanlade7118 2 жыл бұрын

How to caculate plate thickness of plate while designing. Please explain its formula and its analysis. Thanks

@DJayDNA 3 жыл бұрын

Very nicely explained. However I am wondering; how would go about to design a steel plate that has both bending moment and shear force? If you have a steel beam that is welded to a steel plate and the plate itself is bolted to a wall, then it would have above mentioned force on it, correct? I thought about using Navier's equation but it uses Normal force and not Shear force. Or maybe I'm analyzing the forces incorrectly?

@RobindeJongh 3 жыл бұрын

In beam design, shear is taken by the web, and bending by the flanges, thus we seperate out the functions that way. You would do the same with a connection to a wall -- select some bolts to take the tension, and some to take the shear.

@alexhodgson5577 Жыл бұрын

Hi Robin, Im currently designing the platform for a aerial lifting platform, used this video for working out the thickness required to withstand the load acting on it. I have the live load amount but would you also have to take into account the dead load (weight of the platfrom) aswell? Was unsure if this video would apply to my question as not sure if it would be considered a cantilever beam calc instead. keep up the good work, Alex

@moha-pp7pn Жыл бұрын

hi there I'm doing a similar project i was wondering if you are still doing it. im kinda struggling myself so i wouldnt mind exchanging what information i have.

@andreahoffman8199 Жыл бұрын

you would have to as the bending moment takes into consideration both Dead and Live loadings (factored.)

@josiahgriffith7370 8 ай бұрын

Is it possible to use this with different materials than steel?

@dennispersson2101 2 жыл бұрын

Is it possible to use the same formula with a reduced "b" (width) of the plate when you have holes for bolts in the plate? For example width 200mm with 2xM20 bolt-holes gives a reduced width of b=200-(2*22)=156 mm. Then use the reduced width to find the thickness of the plate. Cheers.

@RobindeJongh 2 жыл бұрын

Yes Dennis, that should work.

@zhuoxu6843 3 жыл бұрын

Really helpful!! But what does the "6" means while calculating Z?

@RobindeJongh 3 жыл бұрын

Thanks. The 6 is just part of the formula for Z.

@kamai346 2 жыл бұрын

Is this the thickness for 1 Factor of safety

@Jpifr 2 жыл бұрын

Hi, thank you ! So what is the number I end with ? The minimal thickness of the section so it won’t break isn’t it ? How can I know the deflection at the place of the load ?

@RobindeJongh 2 жыл бұрын

Hi Jean-Pierre. The number you end up with is the required thickness of steel. To work out the deflection you will need to use the deflection formula for a cantilever, which you can find online, something like PL^3 / 3EI

@Jpifr 2 жыл бұрын

@@RobindeJongh Thank you ! I know where to look now, I love your channel I've subscribed right after seeing that video

@kyvman Жыл бұрын

Hello Robin, I am fabricating a mono-stringer staircase and after watching your video I found that d = .314961. If that is so, then do I assume that using this thickness or thicker (say .375) it will not deflect with the end load?

@RobindeJongh Жыл бұрын

Hi Eric. A mono stringer staircase would usually be made from steel box section, and it would not usually be a cantilever.

@Ro2006Ro 3 жыл бұрын

Hi there, I've been trying to find info on how to calculate how much weight a simple steel profile can take and I can't find anything, everything I see is about I beams and such, I want to know about simple rectangular profile, 5 mt long, 50mm height, 20mm wide, and 1.5 or 2mm thick. Can you help?

@RobindeJongh 3 жыл бұрын

Hi Rodrigo. No problem - see the RHS (rectangular hollow section) tables here: www.steelforlifebluebook.co.uk/hfrhs/bs5950/bending-s355/

@AyaAlghadhanfri Жыл бұрын

How to calculate the plate deflection

@mrmadame28 2 ай бұрын

Z = b*d^2/4. What you have used is S. Its safer as it assume a triangular distribution of stress. But in that particular concept, Z is the right choice.

@shohel1718 3 жыл бұрын

Sir can you upload one more calculation. The quersion is- Steel plate size L 6m X B 2m X h 70mm. On that steel plate we going to apply load on area of load (2m x 2m). This load place on just center of that steel plate. So we need to know once the steel plate position on hard ground then what is the maximum strength of steel plate. On that condition. Hard ground gbp will 35 ton/msq. Apply load on it 70 ton. Sir we are looking compleat design calculation.

@RobindeJongh 3 жыл бұрын

Hi Murshid. If this is for a project, you might find 1 on 1 coaching or consultancy helpful on this: forms.gle/FN4ZhRX9j4Dt3GEk7

@sabihafasth9565 3 жыл бұрын

Where can one find the formula for Z ? Is that the plastic capacity or the elastic?

@clb09120 3 жыл бұрын

Plastic

@that.unknown 2 жыл бұрын

The Z used here is the elastic modulus, the plastic modulus is bd^2/4 while elastic is bd^2/6. Canada and the U.S denote elastic modulus by S and plastic by Z. Which I find much more intuitive since a material would reach its elastic capacity first before plastic, just as S comes before Z in the alphabetical order.