hi guys Greg here and welcome back to SITENG where you're going to find all interesting civil
engineering stuff and today's video is the second one covering the local grid and as you can see
here i got a local grid uh we got a spreadsheet ready and i'm going to show you step by step what
we're going to do to do the transformation of our global grid to our new local grid and how to use
it later on site so let's go this is my new local grid i just created in last video and you're going
to find the link up here for it if you didn't see that and uh what i'm going to quickly do i
just maybe change the color so it's going to look a little bit better and i'm going to change it for
yellow and i'm going to maybe change the scale as well so that line is going to be look a little bit
better i'm going to select similar i jump quickly to properties and i'm gonna make it maybe 0.1
yeah they look much better now and that's what we got guys this is our new local grid i coordinated
it as i said in the last video so guys the most important thing is that we're going to be able
to set our instrument on site and we're going to be actually able to use our new local grid
so for these things we need information from the architect about the grid lines and about the
coordinate gridlines actually in a global grid and we're going to need later a control point as well
and these are typically provided in global grid as i said so we're going to be doing transformation
ourselves so i'm going to go now and jump to architect drawing and we're going to have what
information we have here and this is coordinated in global grid uh and i need to tell you actually
i played it with a little bit the information provided by architect wasn't the best as you
can see here he gives us coordinates grid line crossing the grid line with the with the wall i
don't know why but anyway i got a two points here and i got the crossing of the grid line a7 with
aa so that's the actually the grid line i was uh using for my transformation and we made it point
five thousand two thousand so as you can see here in the global grid this is five two one four two
four whatever and then one eight nine nine six four uh and three two six so this is the global
coordinates and as you remember from the last video our new point here is five thousand and two
thousand and that's what we're going to be doing here we're gonna be transforming this into our
local grid so i'm going to use definitely this point here and i got another one here
which is grid line 810 with grid line bc so these two points i'm going to use for the transformation
and for these guys i'm going to use first the excel spreadsheet which you're gonna see in a
minute using the spreadsheet is very very useful as especially on site when you're gonna end up
with a ts06 and you're gonna you might not have even an autocad and then you can still create your
local grid and you can work with it easily and i would say even if this is more important when you
have a site like this and then you you're going to need a local group because that's going to
speed up all your setting up process very much so typically guys i would prefer have a one one point
here and one point uh somewhere like this one but as you can see this is not a crossing of the grid
lines here so i cannot take this one so what i'm going to do now i'm going to open our spreadsheet
and i'm going to take these two points so i'm going to take this points in the global grid and
i'm going to get same point in local grid and i'm going to do exactly the same for our second point
so let's go so guys that's my lovely spreadsheet here i actually got it myself from engineer a few
years ago and i was always using it when created local good and doing that transformation and later
we're gonna compare it with the cut drawing as well we're gonna take align the drawing and we're
gonna have a look what error we have as always they're gonna be some small discrepancies but we
wanna make sure they are within our tolerances or that we are gonna be happy with using it so guys
as you can see here i got original bass line here so that's going to be our global coordinates here
so i can actually mark it here as a grid line base crossing grid line a7 with grid line a a so that's
going to be our first point and i'm going to take it from that global coordinates here which i had
on the card drawing so let's go back here quickly and we're going to take our crossing A7 with aa
so that's the coordinates here i'm going to type it quickly in that spreadsheet so the easting was
i'm going to type it here in meters uh though the coordinates were in millimeters there but
that's what we're going to do we want we we're going to be working in meters so
and these guys as you remember was actually this the start of my grid line of my new local
grid so that was exactly 5000 easting and 2000 northing so what i'm going to need to finish
to complete this i'm going to need the second point which was in our case gridline 810 slash
bc and that crossing of the gridline provided by architect so that was
so all we have to check now obviously we need to come back to our local grid and we need to check
what A10 and BC is in our new grid so i'm going to come back quickly here and then that was A10
and BC so uh BC A10 this is A10 and BC so maybe i'm gonna just create a point here and that's
gonna be our coordinates in the local grid so i'm gonna check the id so ids 50766 and 2026
438 so i'm just going to type it in quickly and we're going to get our spreadsheet ready
so as you can see guys after typing these two coordinates two crossing uh of the grid
lines A7 A8 and eight and bc in the global coordinates in the local coordinates uh the
spreadsheet here uh calculating already got some angles so the rotation is now known
and we're going to be changing now the points uh whatever point in global grid we're going
to now type here easting and northing and that going to pop up here on the right hand side as a
same point in our new local grid so that's great guys and as i said once you work in
in some job and you got only tso6 and you got no cut available this is great as you can create your
local grid only with that excel spreadsheet and just with a pdf drawing so calculating you'll save
the new position in your local width and comparing to the global original coordinates and that guy's
uh really going to speed up your setting out and i cannot really imagine working only with ts06
and without the local grid so i'm gonna take now guys three control point station so we're going
to be able to set up our edm in new local grid so i'm going to go back to the cut and i'm going to
take that information here so the information was provided here i got a cut drawing for this as well
i'm going to take maybe this point here which is bpl05 i'm gonna take one maybe on this side here
bpl04 it doesn't really matter it's gonna be three points i'm gonna check so we're gonna be able to
set up our edm and i'm going to take maybe bp 01 so i'm going to have three sizes perfect for
resection really as we're going to set in a somewhere here we got three points
so what i'm going to do for now i just copy this with the base point and i'm going to actually
paste it on that the control points from our architect here uh so ctrl v oh oh yeah so you can
see here i got one point here one point here and one point here so this is great for setting up but
what i'm going to be doing now i'm going to take the coordinates for this point and i'm going to
type it in the spreadsheet and we're going to be finally ready to do our setup in local grid so i'm
going to go from bpl01 and uh i'm going to type quickly bpl04 and vpn or 5. just quickly show you
here are the control points the information is provided here for all these stations so
that's typically what you're going to have on site you're going to have them in global coordinates as
i said so vpl for one four five so i'm going to type in quickly here i can actually copy this
from here and i'm going to show you how it works so i'm going to copy the easting here quickly
i'm going to jump to my instant here so ctrl v uh coming back quickly here to the cut
and i'm going to take the northing control c coming back here ctrl v and that's what i got guys
this is perfect so that was the station actually i pressed bpl05 but i'm going to put here back uh
bpl05 so bp l o5 and that's my station here guys have a look how lovely it is we got one
point here and we got new point here in the local grid so i'm going to take that bpl01 and bpro4
i'm going to type it in and you're going to see here new stations and what i'm going to do after
this guys i'm going to take that drawing and we're going to start aligning them and i'm going
to take this global drawing with the coordinates i'm going to align it to our new local grid and
we're going to see what error we're going to have on the cut drawing as we should have exactly the
same points in our local grid when using the cut so i'm going to type this quickly here bpl
i'm going to take the height as well in this case so let's do that
so that's what i got now i got my three points i'm going to be able to do the resection now
and that was in global and obviously we are now ready to do our resection in local grid and what i
always do guys i just quickly tell you when i down there with my instrument and i do the resection i
always double check it on site how it looks and obviously we're going to check it now and align
on the cut drawing and that should be perfect but what i always like to do i actually try to do the
two stakeout points if you can stake them out on site i really love to see whatever i got actually
on site and when i set my edm there i try to do the stakeout or the same point so i'm going to
set my edm in the global grid and i'm going to shoot the point doing the stakeout and then i'm
going to have a look exactly how it is one point here and second point here and what i got actually
when i'm doing a setup on side with my local grid and what i'm going to have in real life that's all
i always love to do i know you can say greg that has to be perfect that's you check on the counter
card and on the spreadsheet but guys i i always want to see it with my own eyes that that's the
position i got in the real life on site and this maybe take you 10 minutes and then you're gonna be
sure so guys i'm gonna go now and i'm gonna double check what we're gonna have when we're gonna align
the drawings and using our local grid now we're gonna take a different level i i think i got
the level number 10 from the building and we're going to align it and we're going to use it then
for our setting out i'm going to go back now to our autocad here i'm going to need actually this
join here our greet and as you remember this is our gridline here in the global coordinates
what i'm going to do now guys is i'm going to copy this drawing here with our three targets
and i'm going to take it into our local grid so just ctrl copy it doesn't really matter where as
we're gonna use the perfect option here a line and uh what i can tell you guys i remember one
of my engineers he was trying to rotate the drawing using the rotate option and uh i think
he was really lucky because there was a great option here a line and that's one you should use
not trying to rotate yourself as you can get some errors and or you can you can do something wrong
so what i'm going to do guys now i'm just going to align that join i'm going to use option align
and i got these two points here so as i said i i can use actually these two or whatever two points
but just make sure they're going to be the same point so you can use the one grid line
but to make it easy i just going to use the same point so i actually marked the point
here so we're going to see here and the second was here i'm going to make a point here as well
and i'm going to align it to my points so i'm going to mark that drawing here and i'm going
to i want to align i want to align it with my targets as well so what i'm going to do now
i'm going to type in align enter and i'm going to take my first point here
and i want to take it to my first point here
and then guys it's automatically asking me to take the second point so i'm going to take my
second point was here as you remember good line 810 with uh bc and then i'm going back to a10 with
bc and i'm going to press it here and i'm going to press enter and this actually asks me do i want to
scale this so i don't want to scale anything here are we probably going to use a scale in the next
one so i'm going to press enter guys and that's what i got here so this is my drawing and this
is actually my my points here my coordinates bp l0104 and o5 in local grid and they should be just
exactly matching what we got on that spreadsheet so that's what i want to check and that's what
we're going to have a look if you got any error here so that's very interesting so let's have a
look bpl01 i'm going to try to take maybe this uh copy this in there and gonna be easier for
us so bpl bpl i'm just going to copy this and i'm going to put it somewhere here in the card
yes we got it here now so so let's compare now uh bpl01 i'm gonna just press id as always and
i'm gonna check this point now here so what we got now is 5037. so 5.037 109 and this 1972
h7 so 875. that's 875. so as you can see here we got one millimeter discrepancy here in the easting
but that's exactly what i said they're going to be small discrepancy but this if this is within one
millimeter this is great guys we're just going to check maybe one on this side here and that's
going to tell us if we got more error than that so let's have a look i'm going to press id point
as well for this one and we're going to have a look what we got so uh 507 70605 and we got 57061
so that's what that's half a millimeter anyway so that's perfect and in northing we got the 2108
8625 in our spreadsheet and we got here eight five nine eight so if you round it up we're gonna have
860 here and we've got eight six two five so two three millimeters error here on the northing but
guys look how far the points are here so we got three millimeters two three millimeters
discrepancy on the length like this the distance here is already outside our building so that means
we're gonna have a less error when we're gonna be doing setting out so this three millimeters what
we got we got one for one meters guys so i would go for this uh it's definitely all right so now
we know our spreadsheet works correctly our card works uh perfect we can use this grid line drawing
now for for our local use and we're going to align one more drawing here that the level 10 and i'm
going to show you how to do it and how to use our grid line now to just bring all the drawings and
align they're going to be very similar to what i was just doing now but because the scale is
different we're going to use scale in this case so i'm going to just go back here i got a level
10 drawing and i'm going to do exactly the same story as before i'm just going to take it and i'm
going to copy this and just copy guys i'm going to go back to our local grid so i'm going to paste
it here summer controller v it doesn't really matter where and as you can see how big it is
because that was in millimeters so what i'm going to do now actually i'm going to align it again
i'm going to use a grid line 8 and i'm going to mark that point going to be easier for me to see
this uh make sure this is the crossing so a10a and we can use actually we can use the same grid line
a a and uh bd let's say so a10 and bd that are going to be our second point i'm going to put it
here it's going to be easier for me to pick it up later so i'm going to mark that drawing here now
and i'm going to use the same option a line which i'll show you just a minute ago
so gridline 810 with gridline aa this point with this one here so a10a it's uh this one here
and then the next one guys was a a10 with gridline bd so i'm going to take this point
and uh we're gonna train actually aligning again eight and with bd i said so this is a bd and this
is grid line a10 so that's exactly the second point for my aligning now and i'm gonna left
click it and i'm gonna press enter now and this is asking me as you can see now if i want to scale
the object's alignment obviously i want to do it now as that one is in millimeter this is in this
so i'm going to press say yes here and as you can see now we got our drawing here now with all the
columns with all all the stuff to be set out and this is now in local grid so that's how easy it is
obviously the scale of the lines could be adjusted really but that's what you need we got you got the
columns you got openings now everything is set in local grid so you can use the align options
this is a level 10 now so uh whatever level you're going to have you just can use
a line option and use it like that so that's great guys and then using ts06 whatever you
got the corners here in the grid line position you can press it and you got coordinates in your
local grid and if you don't have a cut obviously guys you're gonna be using the pdf drawings and
you're gonna be taking dimensions provided by the structural engineer of the grid lines to the
element so guys i think that's gonna be slowly the end of this video uh we are ready now to do
everything we want with the local grid and we know how to create local grid and everything really so
coming back quickly to that spreadsheet we got the targets here we can print it put on the wall and
obviously guys put our new local grid into our instrument and we are ready to go now so guys
uh i think that's it then uh thank you again for watching if you like this video just don't forget
to leave the thumbs up guys uh please subscribe to the channel as well and the by the way all that
spreadsheet and all the information provided in this video are gonna be available to download in
a few days on linkedIn and then you can train yourself really i'm probably going to create
one more grid i'm going to do like an architect job i'm going to create a grid line for you so
you can download it and you can train yourself so thank you again for watching and see you next time