hi guys and welcome back to SITENG where you're gonna find all interesting site engineering and
civil engineering stuff and in today's video guys i'm gonna be showing the rebar drawings
i got a few drawings here i got some walls i i got some slabs but in this video guys i want
to mostly focus on the bar bending schedule and the shape chords here as you can see uh
the the codes are here and i want to go through it and at the end of the video i want to show you
a few things that each engineer should actually know when it comes to the rebar especially if it
comes to changing something on site as we go so let's go so guys first of all i'm going to show
you the few rebar drawings here at the rainforest concrete drawings and i'm going to go through this
i got a beam drawing i got a column drawing and i got the slab as well so bottom top we're gonna
go and the shell links that's typical drawing here through the beam guys uh i already got a
few videos about the rebar so you're gonna find the links up in here when i do the pre-pour
inspection and i'm covering some drawings as well so as i said this is gonna be focused
mostly on the rebar bending schedule and the shape codes but just to quickly go through it
drawing is really nice everything is clear here so guys you can see this this stands for three
number 16 millimeters bars bar mark 15 and we got some links here but it even says links in pairs
so five eight millimeters links uh position number 102 and the 150 gonna be centered
i'm gonna go uh quickly to the notes here's probably says something interesting so always
guys remember if we dealing with the drawings we need to go through the nose and we need to make
sure this is for construction so i'm not going to be repeating this anymore but obviously we get
some information here we got minimum laps here by designer so that we need to stick this is the very
important thing i saw i was going to remind it at the end of this video and all the stuff and we
got abandoned schedule here but before i'm going to jump into bending schedules i'm going to show
you the column drawing here as well guys uh so that's the typical rebar drawing here presenting
the columns uh here in the uk that's what you're gonna find so we got all the information here we
got column number how many numbers of the same columns are on the there's the second floor to
third floor so as actually first floor to second floor so you got all the information here as you
can see you got main rebars here marked 8 20 millimeters bars this is the l bar here
uh you got the eight millimeters links and as i said this is a bar mark number three
200 center so that's how it is and i'm gonna go quickly to notes because some drawings actually
show you how to read it so you don't need to even know actually so the information is here uh not in
this case actually but the ef each phase u bars l bars uh top of concrete and structural slab levels
that's abbreviation actually given here by the designer we got a section here we can see how the
column should be looking like uh you got a section at the bottom you have a section at the top of
the column which is very good and we're gonna see number three and four so sections are here
number three you see how the how the columns should be looking like uh this is number three
and this is number four so you can compare all this and when you're gonna be checking this or
this is for fixers as well they know how to do this column how to prepare it for the poor so
that'll be columns guys and obviously i'm gonna jump to the bar bending schedule and the slap as
well some people were asking me to to say more a little bit more about the slab so guys that's
typical drawing for the slabs and in most cases you're going to get the separate drawings for the
bottom reinforcement and for the top as well and they're going to be shell links also so in most
cases in the simple residential building now in in london you're going to find the shellings and this
is outside the most important thing when it's when it comes to the rebar apart from the big
rebar additionals uh this you can see as i said in my one of my videos up there so i'm gonna go now
to the notes here because that information here is really nice uh provided here you see got all
abbreviations here guys so you got t1 everything is explained once you're gonna get these drawings
you can actually go through the legend and go back and you're going to read yourself so this
is very simple uh it's really nice for a designer to provide the information you got the bars in
these drawings are listed as well so you know the the centers bar mark diameter of the bar grade of
steel and quantity of bar multipliers so it's very good guys all is here so that's how it looks uh
and i'm gonna jump in a minute in the bar bending schedule uh we got some sections here as well and
as i said guys these drawings will be provided here on my site soon uh it takes me some time
but they're going to be provided so you can have a look yourself and i probably base my drawings
on something like this where you're going to find all the information on site so i'm not going to
be saying too much about it but similarly to the columns and to the beans really all information
is here and the bars are marked on the drawing so for instance this bar here uh you go in here
and you know this is 432 millimeters bars every 200 centers bottom two additional so this is
additional steel so this is very important steer here this bar here that's the bar marked here
and this is going to here so that's going to be slab reinforcement drawings everything going to be
marked here and that dot means refer from here to here you're gonna have a bar mark this is the bar
marquee so that's how the bar gonna be looking the the bar in real life this is the bar marked here
and then you go here and looking for it so this is 432 mil bars again at bottom two additionals
so that means they're gonna be four bars here one two three four but that's it guys i'm gonna show
you quickly the top steel it's very similar in terms of uh drawing i will have to cover maybe
say a little bit more about it but as i said uh i'm gonna provide this drawing so you can have a
look yourself and then ask me any questions no then the nice information here is actually you
got the direction of the steers so you know what the bottom one top one and bottom two and top two
still how it should goes how it should be late when the fixer is going to jump on the decking
so guys uh quickly show you the share links as well this is quite interesting drawing actually
and uh as i said this is section here so that's how the shelling is going to be looking for and
we're going to have a look in a minute what's the shape code for it and what diameter actually we're
going to be looking in the bar bending schedule so this is the layout here for the poor and you
can see the columns are marked so that's what you're going to typically find here the columns
going to be marked so psc 45 for instance if you want to be checking the steel for it or
we're going to be looking for the seal for this column ps45 i said so that's going to be column
yeah ps45 so i think on the drawing is few columns more so ps45 and ps52 so look how many
this is crazy guys and uh to be honest i'm going to tell you about the shell links it's it's not
really easy to install them and it's really pain when you're gonna be working on site as as a qa
engineer for instance as this is probably gonna be last to come i few times i was fighting with
it to install them before that when you're gonna get the rebar like this which you're gonna have
to install later this is not the best solution and uh if that would be my decision guys i would
definitely go for the share rails which is much better solution and it's definitely much better
and i know that trust me i'm gonna show you in a minute how they look so that's the drawing guys
and i'm gonna go jump now uh come back to that beam schedule so all the information here on the
schedule this is mostly for the fixers obviously as you're gonna see this on the drawing what
diameter is but it's gonna be more complicated if you wanna make sure that proper rebar is
used you have to go to the vending schedule so all information is here you got a bar mark here
for instance let's take this one you got the bar mark here you got the diameter
number of members and number of bars in each member and the total number of bars so everything
all information is here the length of the bar and you got the shape code guys and in today's video
that's what i wanted to cover more a little bit shape codes plus i'm going to do some extra at
the end of it so that's a 0 that means this is a straight bar and i'm going to jump in a minute
to the shape codes and guys we as engineers we should know few shape codes we should just uh
know by heart we should remember them so zero zero this is a straight bar one one this is the l bar
two one uh this is the u bar so you can see how easy it is all information is here you just need
to go through it and make sure you know everything and i'm gonna go through the slab schedule here so
uh the information here provided you see the top port number one everything is there and you can
see zero zero zero zero zero so most of these bars gonna be straight bars and i think in this
case actually all of them so so as you can see all all bar size trade apart from this one uh
26 probably gonna be some juggle bar but that's the information here provided and you're always
going to find it on the side i just quickly jump to the column schedule as well so same story guys
you got the bar mark diameters number of members everything is here and then you got a shape code
here so as i said one one gonna be elbar and the 41 gonna be guys uh that's gonna be the links
so i'm gonna go now and show you the the shape codes and you can easily find it online if you
wanna make sure what to use or if you wanna see how that bar gonna be actually in the slab or in
whatever particular element you're gonna be doing so i'm going to jump now here i'm going to show
you some shape codes uh this is one of many sites here i think if you just type something online
you're going to find you're going to probably be a few pages going to pop up so but that's how it
looks guys you got more information here uh you see the shape called zero zero as i said as a
straight bar one one it's a l bar one two it's elbara as well but probably the the radius is a
little bit different so this is all calculations here guys but i never use it to be honest so you
you just need to know that bending the bars is not that easy guys that you have to have a minimum
radius when you're gonna be bending the bars and this is depending also how the bar gonna
be working later in the concrete but these small things and bits and pieces i'm gonna cover more
in my structural series when we're gonna talk how how the reinforcement is actually working in the
concrete and how all the the loads and everything is redistributed through the elements so that's
the shape codes guys i'm going to go here you see one four one five two one that's the u bar here uh
22 so that's gonna be actually it's looking like uh our shuttlings so 2428 i really recommend you
to go through through this and have a look yourself uh what's everything about and then
you're gonna find here you're gonna download some bending schedule and you can have a look yourself
and how to look for it so your imagination gonna work when you're gonna see the drawing the flat 2d
drawing you're going to see see how it's going to be looking and how that's still going to be
late and how it should be later especially when you're going to be checking the steel fixers
so guys i think that would be all about about about the band bending schedule here and about the
the shape codes i think the shape codes are really important so that's that's the thing that's that's
where you're going to find them guys and i really recommend you to go through them uh it's easy as
it is here you got a shape code here and you know how the rebar gonna be looking and depending on
designer how many sections he provides for the particular element you can actually see these
bars how they're gonna be looking uh in real life and it is impossible to do the section for every
single bar so obviously that's where the shape codes come in and obviously guys the shape codes
are mainly for production so if you're talking about the bar bending schedule this is going to
the fabrication so that's how they're still going to be produced so any mistake there in the bending
schedule that going to be actually what you're going to get on site so uh that's another thing
if they're gonna be any discrepancy between the drawing and the bending schedule you can expect
that bending schedule gonna be one delivered on your side so it happens sometimes that the drawing
shows 25 millimeters bar and on the schedule is 20 millimeters bar and that's the problem guys
and actually coming back to the end of this video i want to tell you about the area of the steering
which is the most important thing where we're talking about uh steel reinforcement and i'm going
to show you now the simplest way to check the area of the steel but there are a few bars we need to
remember guys just by heart like let's say the few shape codes we need to remember that's the few
bars we should remember like 20 mil bar 12 mil bar and wherever so uh 20 millimeters bars are gonna
be three point fourteen centimeters square of the steel 25 millimeters bar gonna be 491 centimeters
square of the steel and why this is so important guys i want to tell you now so let's say we are
missing for instance uh 20 or a few 20 millimeters bar and obviously the fixer is going to tell you
ah we're going to use two tenths or maybe even 2 12s and it sounds maybe or 2 12 and 120 mil that
makes sense but it does make sense guys as we're talking about the area of the steel and how to
check it i'm just gonna go quickly here obviously if you're gonna take about 20 millimeters bar
this is 314 of the centimeters and 12 millimeter bar it's only 1.13 so 212 millimeters bars they're
not gonna even give you two and a half centimeters of the steel area in the element you cannot really
use it maybe 16 and 12. so guys uh the easiest way to check the what what area we got of the steel
we're going to go a pie so we're going to go 314 i'm gonna just round it off to two decimals so 314
times the diameter so i'm going to go for 20 mil bars which is 2 centimeters so it's going to be 2
and this is square so in this case 2 times 2 so i'm going to go just easy 2 times 2 and i'm
going to close it and that's gonna be divided by four so that's how easy it is guys and in this
case obviously this four goes with this four so that's the area of our 20 millimeters bar it's 314
centimeters square so how do i get it guys it's very simple i just maybe go here i'm gonna show
you this is stands for pi so that's gonna be pi times it's a diameter guys uh square i just
wanna make it nice here uh this is square and i'm gonna close it now and all this uh gonna be
divided by four and that's how we're gonna check the area of the steel which for us engineers
are the most important thing when we talk about the steel in the concrete when we talk about the
rainforest concrete and if you're going to be working by any chance in a design you're
going to see that this is the results you're going to get and then later from these results
you're going to be distributing your rebars you're going to be drawing your rebars on the slab or
whatever elements so guys that's that's the very important thing as i said you can compare what bar
you can change for what bar and uh you should know a few things like 20 mil bar 12 mm bar 60 mil bars
just guys please remember these things remember the basic shape codes this is the very important
things for us engineers and i i cannot imagine a good engineer without knowing this stuff so i
think guys that will be all in this video i hope you enjoyed it and if so please don't forget to
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