Friday, May 27, 2022

GATE ME 2022 | Fundamental Series | Engineering Mechanics | Trusses vs Frame | Dheeraj Sardana

Yes welcome back guys on this wonderful platform grade up and today we are going to start the fundamental series of engineering mechanics as i already promised you that in september we will be having a wonderful series for engineering mechanics so guys please tell me am i properly audible and visible to all of .

You or not please tell me that please tell me guys am i properly audible and visible to all of you or not yes yes good evening sagar good evening hari abhishek good evening and thanks for your wishes so guys are you ready for this wonderful series now we are starting this .

Wonderful series and this time i am saying that we will be completing the engineering mechanics okay hari it is restarted now thanks sajal once again to you and this is restarted and now we are going to complete engineering mechanics in this series so quickly like and share the session so that other student can .

Also join quickly okay yes yes yes uh dear actually i was outside i was on leave that's why it was stopped in between yes bharat thanks for your wishes ajay thanks for your wishes yes sagar thanks for your wishes okay guys so now let us start it now let us start it yes so guys quickly like and share .

The session and then we are starting the trusses for the first chapter and guys as i already told you now we will be completing engineering mechanics from first to last every chapter will be covered so don't worry about that okay so this is a fresh start we are starting .

It now yes yes yes yes okay don't worry friction also i will be completing after this okay sub sahaja everything will be covered question as well as practice this is some detail about myself and today's subject is engineering mechanics okay so we will be covering it in complete way even we will go up to pi level up to xc level for all .

The topics yes thanks for your wishes parvinder thanks for your wishes and namaskar let's start now okay this is about gate champion study plan now thermal part is going on and this is about mmc september schedule these are the exams these are the tests on 12 september 15 september and 28 september okay you .

Can join them and this is the offer going on 25 percent off you can use teach 25 code this is a teacher's day offer so guys this is about reason batches as you already know is an english batch with an hindi batch and for 23 students so guys now we are moving to the starting so guys first of all we are starting .

With trusses and frame so my first question arises that why we require trusses actually yes yes yes welcome to this session and thanks for your wishes obviously bharath after class i will be sharing you pdf and after completion of every chapter i will give you assignment i will be sharing you pyq of me ce xcp .

And i at the same time i will be giving you notes as well the timing of this session will remain the same so don't worry about that okay yes so guys when we are talking about this chapter trusses first of all what are trusses so trusses are basically used .

For holding for taking up the loads okay so what we do basically we are just joining some members to support the load now the point comes why we require trusses for supporting the load when we already have the beams so my dear you know when we are having a simply supported beam like this then obviously it can also bear the .

Load and we also show some time point load w like this sometimes we have some cantilever beams as well sometimes we have udl uvl as well so when we already have the beams then what are the requirement of trusses the point is that so my dear yes when we are talking about the beams beam yes yes yes anil it will be 5 pm surab .

Good evening and welcome to this session so guys as i said when we are talking about the loads w is acting here some p is acting here some w kilo newton per meter is acting here no doubt about that that beam can bear the load no doubt about that then when beams can bear the load what is the .

Requirement of this type of structure this is the basic question which comes into every student's mind then my dear i would like to tell you you have studied something deflection in the strength of material subject so when you deal with that deflection you know that for this case beam is going to be deflected like that and if you see that if you are .

Going to find out this maximum deflection so in so we have derived the expressions for that and those expression shows that y max is equals to w l cube upon it is going to be 48 ei so my dear from these expression you can say that the maximum deflection is directly proportional to l cube and directly proportional to load so my dear .

If load is going to be at yes so when the load is going to be at a very big limit when loads are quite high or when lengths are going to be quite big like we are having in the case of bridges in the case of stadiums in the case of mobile towers when my dear we are going to have the length to be quite .

Big then my dear in the case of uh you can say sheds as well yes hello so whenever we are going to have length to be very very big when we are having load to be very very big in those condition my dear the deflection also reaches two very very big values the deflection value also becomes very very big so for such cases my dear when we are .

Going to have more deflections and when when it will be coming when length is quite big or load is quite big for such cases my dear we cannot use the beams because otherwise whenever you will be seeing that it would be shown like you just said joule jai you will be feeling like that but we require rigidity in the beam can you feel if you're going .

Through a bridges and bridges like this and you are going through that definitely you will be having fear into your mind if you see sometimes we see the movies where these kind of scenes are being shown that in the hilly areas that kind of see that kind of things are made and they are like this and when the peoples are moving through that in .

Between when something breaks my dear we see the accident so my dear we cannot have we do not want such kind of thing to happen we want rigidity in the beams we want rigidity in the structure we want rigidity in the bridges and all so my dear when you need rigidity definitely you need to take care of that so for that my dear we are making the .

Trusses and when we are making the trusses you know this is one member and at this joint other members are also connected and when we are connecting the members like this when a number of members are joined so because of that now whatever the load will be coming it will be divided into the members because of which the deflection of individual .

Members will be very very less which will be uh i can say that it can be permitted so whatever the deflections will be coming for trusses it will be in the permissible ranges in the beams it is coming in not permissible ranges so my dear if somebody ask you why we require trusses when the deflections are going beyond a range and when it will .

Happen when the length is going to be quite high or when the loads are going to be quite high so in these condition we are going for truss not only trusses we are also going for frames as well so my dear today we will see the difference between truss as well as frame okay so one by one everything is going to be covered and guys be with me don't miss .

Any session if the response of this series for trust would be good then we will be going for friction and one by one i will be completing each and every topic of engineering mechanics for you guys okay so let us move further let us move further so my dear when we are talking about trusses this is the example if you see .

If you see the example of trusses my dear this is a kind of railway bridge you can see and you can see the kind of the triangles how it is made so why these members are joined like this because you know the length of the bridge is going to be quite high and the load which will be coming on to this in the terms of rail that is also going to .

Be very very high to my dear there are more chances of deflection which can be more in magnitude so my dear for saving we are going to make this trusses so that individual member deflection should be in the permissible ranges and i feel you can feel the trust members how they are acting and this is .

Like two parallel lanes are going on and everywhere trustees are working yes sri yanshu and superno good evening and welcome to this session and thanks for your wonderful words so guys as per my promise i'm coming with engineering mechanics classes so this is a railway bridge an example so this is a railway bridge .

It is an example it is an example for the trusses okay there are some other examples as well yes yes yes uh dear hari i will be covering each and every topic now because now this is a way this is a chance of complete engineering mechanics because every student have not appeared for .

Those series and now those series are not available so guys i will be going for complete syllabus so that those students who are preparing for gate 2022 they can cover the entire engineering mechanics with me yes three to four topics we will cover on youtube two to three topics we will be covering on the app in that way i will try to complete .

This subject in this month okay and at the max we can go for first week of october so i will be completing in a manner that even if you are going for xc paper you would be able to make each and every question of that okay so guys this is one more uh picture this is for stadium okay this is the roof of stadium so stadium roofs which are also very .

Very big so for them also we are using the trusses i feel you can feel them so guys today whatever i am showing you this is the diagrams where we are using the trusses in the applications okay you can also see this this is also an example of trusses as well so guys as i already told you that the stadium roofs the stadium roofs okay .

Railway bridges railway bridges okay railway bridges okay all these applications where wherever we have or you can say the service centers the service centers roof if they are very big in length then also we are using there but guys when we are talking .

About our homes there we are using homes uh there we are using either beams or frames okay because they are small in length in general that's why so my dear this is uh one more application where you can see this is the trusses this is a service center you can say or you can say it is the shed shed roof so as you can feel everywhere wherever we are .

Using the trusses these are the applications i am showing okay so all these are the application and today i will be showing you much more yes malai thanks for your wishes praveen thanks for your wishes so these are the applications i have shown now my dear we are coming to the types of trusses so my dear when we are 5 pm is .

Difficult already mathematics is going on after 6 p.m is good may try to change the timing so it is crashing okay hurry i will try to change it don't worry okay i will see the best alternative and then we will go according to that okay so quickly like and share the session guys now we are going for the types of trusses guys .

My dear when we are talking about the types of trusses my dear there are two types of trusses one is plain truss second is space truss so my dear when we are talking about plane truss if all the members if all the members if all the members of the trust if all the members of truss if all the members of trust .

Are in one plane are in one plane if all the members of truss are in one plane then it is said to be plain truss and my dear if the members are in different plane if members are in different plane if members are in different plane if members are in different plane then it is said to be space truss so my dear i would like to .

Say that plane trusses are also called as 2d trusses and my dear space trusses are also known as 3d trusses at the same time i would like to tell you my dear that in our syllabus only 2d trusses are there they are easy to see easy to study they are okay so we are going for the all the subject like some also we go for 2d loading .

Everything is in two dimension so everywhere we are going for 2d only okay yes uh thanks hari so guys this is something as i said play interesting and space truss now let us see which kind of trust it is it is a plain trust you can see all the members are in one plane all the triangles are joined with each other so .

This is the example of plane truss guys this is the example of plane truss okay similarly if you see this if you see this this is the example of space truss this is the example of space or 3d truss and mighty then if you see this this is also the example of space or 3d truss space or 3d truss okay then if you are going for the railway bridges it is a .

Plain truss because here you can see everything is one plane so guys this is how you can you can check which kind of trust it is whether it is a plane truss or it is a space truss it is very easy to identify now for you guys and one more example i will be showing which generally people are not showing this the mobile towers and all .

They are also the example of space truss they are also the example of space truss so guys these are the application here we are using them for high tension cables so my dear you can see high tension for high tension cables uh what we are towers mobile towers we are using they are also the example of space trusses because .

They are in 3d so guys this is how we can identify plane and space trusses you can see this this is a space truss so guys please tell me from this figure everybody clear that where we are using the trusses because to study trust is first of all we must know the application of trust so you tell me guys did you get where are the .

Applications of trusses please tell me that did you get it or not first thing then we will be moving further yes today is teacher's day so don't worry i will not teach you much okay so don't worry uh we will be going for 30-40 minutes today and from tomorrow it .

Will be a one-hour session and we will be having enough practice you will be loving the way we will be going for and we will be going up to xc level guys so you will be becoming the master of engineering mechanics okay after this series just you need to join live regularly now my dear we are going for the analysis of .

Trusses so when we are talking about analysis what is the meaning of analysis first of all we must know that like we have made a figure this was the figure so this was the figure so my dear if this is the figure first of all when we are talking about that we are going for analysis of trusses so what do you mean by analysis first of .

All so mighty when we are going for analysis word it simply means that as you already know some loads will be acting like this p is acting here q is acting here r is acting here so when these loads are acting because of these loads we are having some members a b b c a c c d b d .

D e c e c d in all these members some forces will be induced and my dear when we will be having the forces in these members so obviously due to that force we will be having some stresses like you know stress is force but a area if these members are made up of some material like let us say mild steel cast iron medium carbon steel like .

That so based on the material you will be knowing the strength of that you will be knowing the yield strength of that material so you know this is the induced stress and less than equals to syt when you will be doing this is a property by a factor of safety then you will be getting the area of the member of truss and by that area if it is circular in .

Nature pi by 4 d square will be this you will be getting the dial of the member so anyway we are going to find out the dimension abdul yes thanks for your words yes yes yes yes sri anshu it is a first class pradhuman thanks for your response so guys this is something the reason for analysis so when i am .

Saying we are going to analyze the trust the reason is to find out the dimension or you can say for designing purpose or in other words you can also say we can see that how much load can be beared okay that also may be the case if we already have the dimensions but majorly design always means to find out the dimension guys so this is what is .

Trusses and frame purpose to study what is analysis of trusses so my dear when we are going for analysis there are some assumption like you know in strength of material whatever the expressions we have derived we had some assumption when we were having machine design we were having some assumption in theory of .

Everywhere thermodynamics always assumptions are there so guys we always have some assumptions because uh if assumptions are not their study is going to be more random so we need to take assumptions to make analysis easier because every reality cannot be considered into the calculation if you will be considering every reality .

Calculations becoming worst and worst so we take the assumption and whatever the deviations are there from the assumptions for that factor of safeties are always there jay kumar good evening and thanks for your wish and guys now we are going for the assumption and the first assumption is connections at ends only so my dear if you see all the .

Trusses then trusses are joined i at the ends only what do you mean by that if you see if you see this so my dear this member this is one end this is another end okay so this member this member every member is joined at the ends only let us say if i want to make another another member in this truss and that member is this one then .

My dear this member will be joined at this end and at this end there will be no connection here if connection is there then it is not trust it is said to be frame so my dear the very first difference between truss and frame that trusses interest is the members of joints at ends only so i will write if there is no joint here .

If there is no joint here then it is truss but if you will be saying this is a joint then my dear if joint is there then you will call it as frame so idea this is the first difference between truss and frame that interests members are connected at ends only whereas in .

Frames they are they can be connected in between also this is how we are going to define trusses and frames so guys the second assumption second assumption is frictionless pin joint somebody if you see if you see everywhere we are having a pin joint everywhere we are having a pin joint .

Otherwise my dear when you go for reality in reality you may have pin joint as well and even we may have welded joint as well but in majority of the textbook it is mentioned that if it is a welded joint we will consider it to be a frame but if it is a pin joint then we will be considering it to be trust but as i said in reality both the joints .

Have been seen i will be showing you some pictures with that as well with that picture you will be getting more and more clear you can see this is a pin joint okay so this is a pin joint so pin joint is really there guys pin joint is really there then you can see some other case here also you can see there is a pin .

Joint okay this is a space truss but we are having a pin joint there then my dear you can see some other cases here also these are pins only now so they are acting like pin joint only they are acting like pin joint only so guys that is the assumption that we will be having the pin joints okay so this assumption is really very important that we are .

Assuming the members are joined by pin joint only then my dear third assumption is loads are acting at joints only this is again a very very very very important assumption if you see in my figure i have shown the load to be acting at point b at point d at point c i have not shown any force which is acting like this i .

Have not shown any force like this so my dear when we are talking about the trusses it is our assumption that that whatever the forces are acting they will be acting on the joints only they will be acting on the joints only and my dear if the forces are acting on the member other than the joint then my dear we will call it a frame so my dear .

First difference between trust and frame we have already seen that in trusses we will be having members to be joined at ends only not in between second is the load will be acting only at joints in case of trusses but in case of frame load may act in between as well and third assumption we already seen that it will be a pin joint .

In case of trusses it will be a welded joint in case of frames so i would like to tell you trusses are something which we are going to study mechanical peoples frames are studied by both civil and mechanical no not mechanical only by civil peoples so frames are not in our syllabus okay sometimes some questions we may so like .

I have already taught you in some one to two things okay is it fine yes yes yes okay akshit don't worry i will be showing you frame as well okay i will be showing you frame as well so as i said my dear lords will be acting at the joints only even you can feel this even you can feel this when i will be showing you these figures you .

Can see loads are coming these are the beams these are the beams which are taking loads and then they are giving the load to the trusses so you can see at point only the load is coming at point only the load is coming you can see in between there is no load okay so everywhere the loads are coming on the .

Point everywhere you can see here also you can feel here also you can feel you will be having the joint wherever the load is coming okay so everywhere loads are coming at the joint only so this is the assumption of trusses and my dear now we are going for .

Some other assumptions next assumption is my dear all the members are two force member what do you mean by two force member like my dear if this is a member so it will be acting like either it will be in tension and my dear or it will be in compression okay either it will be in tension or it will .

Be in compression so it is said to be two force member so it is said to be a two force member either it will be in tension or it will be in compression and why it is so because my dear lords are acting on the joint if load is acting in between my dear then for this part this w will be acting as .

Direct transverse shear load and if it will be direct transfer shear load then definitely there are huge chances that this member is going to bend like this and if it would be bending shear and bending stresses will be coming into picture but as i already told you my dear that this is our assumption the loads are acting at the joints so my .

Dear the members are not subjected to shear they are not subjected to bending they are only subjected to axial loading either tension or compression because forces are acting on the joints many students may get confused like if i am having a beam like this so my dear use you may cesar beam is getting bending but it will be getting bending because .

The loads are acting in between if loads are no texting in between then beams are not going to bend so my dear bending occurs whenever we are going to have the shear forces or bending moments onto this and my dear if the bending is going to occur under the compression then it is said to be column or struct so my dear yes many students may be thinking .

That sir we understood that why we need the magnitude of force because it is important to find out the stresses but do you feel that yes direction also should be known do you feel that we must know whether the member is under tension or compression so my dear the answer is yes it is very very very important to know whether the member is under tension .

Or compression why because my dear if member is under tension it is going to fail under tension only but if the member is under compression you may have buckling failure as well which you have studied in strength of material columns and stretch topic so if member is under compression then my dear the reason for failure may be buckling as well so that .

Is the reason why we must know whether the member is under tension or the member is under compression so analysis of truss is important not only to get the magnitude but also to get that direction as well because my dear when you will be knowing that direction you will be knowing whether the member is under tension or compression and when .

You will be knowing that member is under tension the failure is going to be due to normal stress only but if it is going to be under compression we need to take care of buckling as well okay so we need to take care of buckling as well this is something i would like to tell you i feel everybody got this .

Point hope you are getting it is it fine guys so absolutely that when we are talking when we are talking about this when we are talking about this so guys when we are talking about trustees and frames there are many differences first .

Difference okay uh robin richard obviously roman this time we are going to complete engineering mechanics but for that i need your presence okay until i will get good attendance i will be continuing up to the completion so i want your presence that is what i require okay because teachers are because of students only okay so let's .

Move further so let's move next part so guys next is weight are neglected so my dear we have neglected the weights of the member in the trusses analysis because if you will be considering the .

Weights these weights will be acting like uniformly distributed load okay but how we can neglect them because my dear it is the similar assumption as you have made in strength of material that bode forces are neglected because when you see the applied load these applied loads these applied load .

These applied loads are quite quite quite bigger than that of the self weight so my dear when we are going for the applied load they are quite quite quite bigger than the self weight so my dear when the applied load are quite quite quite bigger than the self weight then my dear deformation stresses coming due to self weight will .

Be very very very less as compared to the applied load if i give you an example it would be in a ratio at least thousand so applied load will be thousand times the weight of the member so when it is going to be a thousand times the load then my dear in front of one thousand one can be ignored very easily so my dear that is the reason the .

Same kind of thing you have seen in some as well when you have studied so you must be knowing that if we are having a member and if it is subjected to some force p then the deformation was coming out to be pl upon a e .

And when we are going for the same elongation due to self weight when it is acting as w then due to self weight is this wl by 2a it is wl by 2a so my deal when we are saying this is going to be wl by 2a it is going to be pl upon a but in reality p is quite quite quite big than w if we are going to have p and w same .

Then obviously this is pl by a this is pl by 2a but my dear in reality this p is quite big than w and that is the reason that delta due to externally applied load is quite bigger than the delta due to self weight so my dear in place of applied load deformation it is very very less so when it is very very less my dear we .

Will be ignoring it supernos or if the weights are considered then it becomes a frame yes superno you can say that because when we are talking about frame the loading are acting over the member the human pdf will be given to you in my telegram channel where you are already there okay you will get the pdf .

Don't worry about that you will get pdf you will get practice question you will get pyq you will get notes as well okay one by one everything will be shared so i am going to continue this time and just i need is your seriousness and we will be going in a way which will make engineering mechanics a crystal clear subject in front of you and you will be .

Loving the way we are going with okay that i can guarantee you okay so this is something we are saying okay so my dear these all are the assumptions we are making for the analysis of that trusses so in our syllabus we need to study only the plane trusses space trusses we are not going to deal .

With then my dear this we have already seen pin joint i have already shown you this i have already shown you these example so as we are having this kind of truss so now everything i am saying first thing all the members are joined at the ends only first thing loads are acting on the joints only my dear self weights are ignored members .

Are two force member two force means it is either subjected to tension or compression now my dear the first point as i already said it is very interesting and important to know whether the member is under tension or compression why because after knowing whether the member is under tension or compression .

We will be knowing how the design should be there so how to know whether the member is under tension or compression so my dear i would like to give you an example of spring let us say we are having a spring this is a spring this is a spring and let us say we are going to apply a .

Force onto spring like this then my dear this is the applied force due to this applied force if somebody is going to take you like that okay then what will happen my dear then member is under tension so member will be showing resistance like this member will be showing resistance like .

This so my dear resistance will be induced in the member like this so my dear if you are having any such member if you are having any such member like this so if stresses are induced like this as i have shown in the previous diagram that is away from the joint that is away from the joint that is away .

From the joint because internally resistance will be like that away from joint then my dear member is said to be under tension such member is said to be tie because in tension member is said to be thai member so my dear it is said to be taisho raj kumar once the series will be over then you will get the link of playlist as well so .

My dear it is going to act as away from the joint then member is said to be thai member tie for tension is it fine or not and my dear similarly if you will be applying a force which is compressive like i am why i am treating it like spring because it is easy to understand for a spring so i will be applying a compressive force on .

This spring like this this is like somebody trying to compress me then what will be my intentions my intentions will be to go like this my intentions will be to go like this so my dear internal resistance which is going to generate in the member is going to be like this and my dear this type of resistance when it is going to be there .

In the member then my dear it is going to be towards the joint so if some member is having the resistance like this which is going towards the joint then my dear towards the joint indicates towards the joint indicates that member is under compression and if member is under compression then my dear .

You will be saying it is a struct bar it is a struct bar and my dear when member is under compression then my dear while designing we need to take care of buckling as well because it can buckle as well so my idea then we need to take care whether the buckling would be the reason for failure or the compression would be .

The reason for failure uh dear my telegram channel you can search by mechanical engineering by a third serve or you can search it like mechanical by veera sardana there are two telegram even there are three telegram channel and in all i share different materials okay so you can join all the telegram channel one is .

Mechanical engineering by dheeraj sir second is mechanical by dhira sardana okay when you will be searching you will get the telegram channel okay you join it i will be sharing pdf into that okay even there you can see my contact as well if you want any help before gate after gate anytime in your preparation journey you can contact me via whatsapp .

As well as call through that okay so definitely i'm always there to help you guys so this is the starting wonderful starting of the series hope you guys will enjoy this series okay let's move further yes mahavir okay okay yes so guys when we are talking about this .

Analysis of trusses we have already seen that how to check that direction sorry how to see whether the member is under tension and compression so if if the forces are coming internal forces are coming away from the joint the member is under tension if the forces are coming towards the joint the four member is under .

Compression if the member is under compression we will call it strut if the member is under tension we will call it tie so my dear magnitude calculation is still pending okay so we will see how we will calculate the magnitude for this case thanks mahavir so guys now let us see now let us see these are now what what .

Would like to tell you i would like to tell you one more thing many students have one more thing sir why we always show why we always show one hinge and one roller support this is one hinge support and this is one roller support like in strength of material everybody knows that in simply supported beam there are .

Three types of combination possible one combination is we can have both the support as roller support so when you will be having both the support to be roller support then there will be a vertical reaction there will be a vertical reaction this vertical reaction will be r a this vertical reaction will be rb so my dear this type .

Of beam can bear the vertical loads but cannot bear the horizontal node if load will be coming inclined like that then you will be having two components of this one is horizontal other is vertical so this horizontal force cannot be beared by these two support so my dear this combination is said to be unstable in case of simply supported beam because .

You are using the trusses in place of them only then the second combination we must be clear about is both hinge support if we are having both supports to be hinge then my drift load is acting like this if load is acting like this then my dear for vertical you will be getting vertical reactions for .

Horizontal you will be getting horizontal reactions okay so for vertical you will be getting vertical reaction for horizontal you will be getting horizontal reaction but my dear here you can see there are four reactions coming reactions are fourier number this is ha this is va this is hb and this is vb so .

Number of reactions are 4 equilibrium equation are 3 so number of reactions are going to be more than number of equation this condition is said to be statically indeterminate this is said to be statically indeterminate and my dear one more problem is if by chance temperature is going to change then because of that temperature this .

Member will try to expand in size there will be some tension coming and when this member will try to expand my idea the problem is these support will try to restrict that expansion and when they will be restricting the member will try to bend and when it will be bending due to temperature stresses will get induced in the member such kind of stresses are .

Said to be thermal stresses so my thermal stresses will be coming in such members which we don't want because they are coming without any load so because of temperature change the thermal stresses will induce because these support cannot allow thermal strain to happen so my dear because of that reason this .

Combination is also not treated a good one the best combination is one hinge and one roller the advantage of hinge is it can bear the horizontal load it can bear the horizontal load and my dear the advantage of roller is it can expand if temperature increases the support will move and you .

Will be getting the thermal expansion so there will be no no no thermal stresses that is the best thing about this combination and my dear some people feel this combination is not good because it is statically indeterminate statically indeterminate means it is difficult to calculate that cannot be the reason of something good or something bad if we .

Cannot do a numerical easily it doesn't mean that numerical is a bad thing okay if you cannot calculate the reaction easily it doesn't mean it is a bad combination no it is bad because it cannot withstand the thermal strain because of which thermal stresses are coming into picture so this is not good because thermal stress is coming this is .

Not good because horizontal load cannot be beared this is best because horizontal load can also be beared and thermal strain can also be there so thermal stresses will not be there so my dear for the same reason in trusses as well we are using one roller support and many students feels that they are something theoretical supports .

In real picture they would not be there but guys i would like to tell you that no in real picture roller support exist and now i'm going to show you the picture of those roller supports wherever you can see look this is the real practical application where we are using the roller support you can see this is a practical application where .

You are using the roller support and my dear you can see there are many other application this is roller support so in the bridges we are using roller support at many places this is once again the roller support you are using so my dear yes they are not theoretical but practical cases real mayhem roller support for use .

Thanks raj thanks for your wonderful comments thanks so guys hope you guys are enjoying this session and guys this was the basic introductory session of this series where i have just given you the examples of trusses the application of trusses i have given you the differences between trusses and frames nothing more than that we have .

Discussed now and my dear now at the last i will be telling you to analyze the truss to find out the forces in the member to find out the members nature whether they are tie bars or their strut bar there are two methods which are used and those methods my dear .

Are nothing but those methods by idea nothing but is method of section is method of joint and method of section so there is one method method of joint there is second method method of section my dear although many students are going with only one method because method of joint is generally the favorite ones of .

The student but there are some question where method of section can give you the answer quickly as compared to method of join so that is the reason i will be teaching you both the methods method of jointed method of section so guys tomorrow we are going to see the method of joint .

And method of joint when i will be teaching you first i will be teaching you with the general case then we will be going for some wonderful questions and my dear day after tomorrow we will be going for method of section and my dear after method of joint method of section we will be going for the .

Questions from previous years in mechanical in civil in xc in p and i and those will be some quality wonderful question i will be solving at least 30 40 percent of pyq in the class and for rest i will be sharing you the solution because i won't rest you to practice i will be covering each and every type and there .

Will be a doubt clearing session as well if you will be saying sir we want this this question to be sold in class i will be going for that it will be similar to the paid course okay you will not feel anywhere it is going to be anyhow lesser than a paid course but it is going to be a free one okay so in free course you will be studying like a paid course only .

Everything will be done like we do in the classes even better than that i will try to say that so guys this is something the trusses so tomorrow we will be starting method of joint and guys once we will complete the previous year's question you will be getting a test also for the topic and the test will also be given in the telegram .

Channel so guys this is going to be a wonderful thing and hope you will get complete benefit of this okay pradhuman it is not yet finalized but uh 90 that chances are that i will be taking only for tom and md i will be coming for sure okay yes so guys please tell me in the comment .

Section bilkul bilkul so i am starting from trust because i want to teach you completely okay yes definitely okay hope you guys are loving the content we have done today i want your feedback that whether the session you liked it or not in the comment section so tomorrow we are going .

For method of section be ready for the session of tomorrow and you are you will be getting the link of the session in the telegram channel hurry i will inform you that tomorrow morning in the telegram channel those who have not joined yet the telegram channel please join it i will try to have this session around 4 30 if it is .

Feasible if you have the classes okay i will try to do that okay rest don't miss because your presence means a lot for me and thanks for your presence and goodbye for this session guys at the end i would like to give you uh some more information about grade up yes this is the frame picture tomorrow i will be showing you frame picture again you can .

See this complete member is joined at a number of places so you can see interest is we are having joint only at the ends here you can see in between joints are there loadings are also there in between okay so this is the case that you can see loads are also coming in between so this is the case of frames okay yes .

So tomorrow we will see the method of joint so this is the star faculty team of mechanical for grade up thanks guys for your wonderful wonderful comment and this is the top 10 students from grade up in gate 2021 .

Yes yes yes guys and after that under grade up super we will be getting structured live courses for gate structured live courses for esc for ps use for research organization and for all these in green card you will be getting the test series okay guys this is the contact for animation related query .

And at the end grade up super will give you this much so guys just download the grade up app and start your preparation journey with us goodbye for this session and thanks for your love and support yes goodbye guys for this session thanks .

Once again you

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