7 Basic Points for Civil Engineers | Basic Knowledge for Civil Engineers | Civil Engineering videos

assalamualaikum guys hope everybody will be fine today in this video lecture i will guide you for seven basic points for civil engineers these points can help you during construction of house as well as if you are working on construction sites so this can help you therefore watch this video turn the end to learn something new about basic points what i will teach you in this basic points the first one for concept of one-way and two-way slip main bars and distribution bars how to find weight of steel bar for slave beam column also how to provide extra bar in the junction between beam and column practically i will guide you so therefore this is very important to watch till the end let's get start guys if this video was helpful for you so you may like this video the first one is uh the concept for one way and two ways name okay i saw many students they are working on construction site but they don't have the idea for uh some technical points so therefore this is important so what is one way and previously practically i'm guiding you okay one way and two-way sleep right remember guys suppose this is a slab okay this is a slip sorry and this is its longer spin which is for example 6 meter and this is shorter spin which is considered width this is length and this is width suppose this is 2.5 meter so how you will know this is one way r two way slab so for that i will give you the example the example is as i tell you before this is longer spin in this short spin so the longer spin should be divided by [Music] shorter spin the longer span should be longer span should be divided by shorter spin so if the value is if the value is greater than two okay so it means this is one-way slab if the value is greater than 2 from longer span divided by shorter spin if the value is greater than 2 so this is one way slap and how you will know the two-way slip so the longer spin divided by shortest pane when the value is less than 2 so it means this is 2-way slab less than sorry less than greater than for one-way slab less than four two-way slab so let me do calculation for this one this is one-way slip or two-way slab then i will guide you for main bars and distribution bars also so you can see longer spin is 6 meter shorter spin is 2.5 meter so we will get the v when you do division 6 by 6 on 2.5 you will get the video 2.4 so it means this is now one-way slab what's the reason because one-way slab is greater than 2 so now you can see 2.5 is greater than 2 so this limb is one way okay so now the second point is for man bars and distribution bar remember guys main bar and distribution bars concept is and one went to a slab specially as you can see this is one way slap so in one way slap we have main bar and distribution bars both we have in this that's why because when we place the steel rods on longer direction you can see this is longer direction so as you can see here sorry on shorter direction this is shorter okay so these steel rods these when we place on the shorter direction so these steel rods are called these rods this is distribution bars are distribution bars but when we place on longer spin as you can see this is longer spin this is also longer spin and we place the steel rods on longer spin so these steel rods are called main bars now what is the work of main bar and distribution bars as you know when the load applied on the sleep so slave transfer the load the concrete transfer the load to the distribution bars this one which we place on shortest pane so these two nodes transfer the load to the main bars because main bars are placed at the bottom the first point is main bars should be placed on the bottom of the slab and distribution bars should be placed on the top so therefore the distribution bars transfer the load to the main bars and main bars transfer the load to the beam and beam to the column column to the footing or foundation so therefore this is the method for applied load okay guys here in one way slap remember and when we sleep as you can see this is one way slip so and when we select we provide the beam on opposite direction on longer spin we are providing here and one way slip so this is one way slip okay and two-way slab should be less than two the value when we divide longer spin by shorter spin when the value is less than two so this is two-way slip so how you will how you will know the two-way slip remember guys the two-wheel and two-way slip we will place the main bars on both positions on both position but here for one-way sleep the main bar should be here crank bar like crank bar as you can see here like this we will provide the crank bar okay like this crank bar we will uh we will make it crank at the end of the support specially at this place like this you can see this is the steel rod here it will come here then here like this so this is main bar okay so here we will provide beams on two opposite side also so here you can see the loads is applied same like this also on this side so this is n2 slab okay so this is two slab so in previously we don't have distribution bars we have main bars on both positions okay you can see uh the on each other okay our longer spin and also on a shorter spin we will provide because this is less than two we don't provide the distribution so it means distribution bars is as well as main bars and two-way slip but here we provide crank bar it at the end of the support on both directions here because the load are applied on both direction but here in this case the load are applied only on one direction same like this like this because here we provide the beams on opposite direction okay only on one side not on two sides so this is the concept of one-way snap and two-way slab and also main bars in distribution bars now the third point is guys for weight of steel how we can find weight of steel for beam column and slope guys for this we have the specific formula d square divided by 1 6 2. suppose i have a steel rod this is a steel rod suppose its dia is 12 mm and the length of the steel rod is suppose one meter and you need the total weight for 12 meter as you can see here suppose i have a steel link which is 12 meter from company from factory we have the standard length of one link one steel rod is 12 meter from factory so therefore this is about 40 feet you can see okay so how we can calculate the weight of state suppose i am finding out the weight of steel for 12 millimeter which length is 1 meter okay so in this case the 12 should be multiplied with 12 d square so the d should be in millimeter divided by 162 so you will get the value 0.88 kg per meter so if you have the length 5 meter 6 meter 12 meter 100 meter 200 meter then you will multiply with that so 12 you will get the total weight got it if this is 12 if this is 10 millimeter 16 millimeter so the formula will be this one you will get the unit weight with that unit weight for one meter means weight of steel for one meter when you do uh the calculation d square divided by 162 if you put any diameter 16 mm 25 mm 20 mm etcetera 28 mm then you will get the weight of steel for per meter then you will multiply the total length you will get the total weight of steel rod okay so this is the uh third one now what is the fourth one so the fourth point is also guys very important as you can see guys here uh we have the stirrup specially for four beam are uh for stirrups for beam and lateral ties for column okay so guys we have here this length hood's length so this length you can get with the formula of hooke's length you can get with the formula of 10d r9d you can use where ds dry of steel rod this one suppose die of this steel rod is for example 8 mm so 8 mm so 10 10 is a constant d is a 8 so it means so we required 80 millimeter steel length for this hook okay next guy is the five one the five five the fifth one point is also very important this angle should not be bend with 90 degree same like this you can see most and most of the construction i'm telling you practically it should not be provided with 90 degree because this is wrong so it should be provided with 135 degree okay the fifth one is hooks bend with 135 degree not on 90 degrees so this is wrong and this is right so this is the correct way it cannot resist during earthquake for beam column etc okay so this is the fifth point now guys the sixth one is also very important and most of the construction i am seeing this point that if this suppose this is a beam okay and most of the construction so this is exposed this uh stirrup is export exposed to the environment it means that those people are not providing the concrete cover guys this is not good to provide the concrete cover suppose i need 12 inches this if the corner if the width of the beam is 12 inches so the ring size this ring size should be what it should be 9 inches on each side we should have 40 mm so 25 to 40 mm should be the concrete cover for beam and column this is very compulsory guys on construction site if you are not a technical person and you don't know about civil engineering and you want to construct your house so the concrete cover should be checked with the help of measurement tape if that is 1.5 inch from one inch to 1.5 inch it's okay so if there is any problem so you should tell to the labor you should tell to the mason so it should be correct it should not be exposed to the environment so after this that the the labor and medicine or the contractor will tell you that we will do plastering for this okay you cannot get the full strength of the beam or column with a plastering but you will get the full strength with concrete so therefore if this is open exposed to the environment so this is not good for the house construction or for pm for anything okay so the concrete cover should be from 25 mm to 40 mm this is very compulsory very important so you should do it okay the other one is guys uh the the seventh one okay so i will write here because i don't have place here so the seven point is here also you can say the development length what is development length guys you can see this is a beam so here at the end so the beam should have extra length so this extra length is called ld denoted by so this is development length this development length should not be less than 12 inches as with this an economy we have development at the bottom which we provide on the top of the footing mission so this length should not be less than 12 inches so for that we have also the formula 16 d where ds dry of steel rust all right suppose if the die of steel rod is 16 mm and ld okay so the lt for example for this we have 16 d so 16 multiply 16 when you get any value here so that will be the development length for column but here it should not be less than 12 inches so this is uh these are seven important points which i have discussed the front of you hope this video can help you and you should follow okay you should implement on construction site if you are making construction of house so in that place you are also able to apply these things if you don't apply these things so maybe you will face more problems after some time in your construction thanks for watching see you next video goodbye

Channel: Civil Engineers

Views: 111,677

Keywords: Civil Engineering basic knowledge, 7 Basic Knowledge for civil engineers, Civil Engineering videos, Basic knowledge for fresh civil engineers, Engineering videos, Civil Engineering Technical videos, civil engineering technical terms

Id: yIeEOt9MSOc

Length: 16min 19sec (979 seconds)

Published: Mon Jun 07 2021