Technical Drawing Scale question

[neil_g]

This is making my head hurt the more I Google it..

I have some pdf architects drawings scaled to 1:50@A0.

I don't have an A0 printer, so if I printed at A4 what would the scale be?

So if I measured 1cm on the A4 print, what would that equal scaled up into real terms?

Thanks GD..

 

[Kearney_1988]

Should be -

1:50 @ A0 = 1:100 @ A2 = 1:400 @ A4

So 1cm should be 400cm

But just double check that against some known values

 

[Delvis]

Could you not print it across multiple pages?

 

[Steeps]

Should be 1:200 assuming the printer is printing actual size.

1:50 A0
1:100 A2
1:200 A4

 

[wolfie138]

how does that work out? Where does A1 and A3 fit in in the ratios, given A1 is x2 A2, and A3 is x2 A4? i'd expect it to be
1:50 A0
1:100 A1
1:200 A2 etc
?

 

[jumpy]

NTS.

For all practical purposes 'not to scale' would be my answer. If you're attempting to measure an A0 drawing, plotted to 'fit' A4, you are barking up the wrong tree my friend.

https://www.google.co.uk/search?q=a...x-b&gfe_rd=cr&dcr=0&ei=0wK5WYaYJ6Sn8we8x4KwAg
the drawing scale converter xls seems to suggest 1:200 if I'm reading it right.

But still, NTS is what I tell people at work when they give me rubbish drawings at the wrong size to the wrong scale.

I used to have a cheat-sheet with all of this stuff in a mahoosive table, but I think I chucked it out of the office earlier this year, having never used it in 5+ years...

 

[Steeps]

It's twice the area, but not twice the length. If you get 4 sheets of A4 and lay them to create a sheet of A2, you have 4x the area, but the length is only twice as long.

A0: 840 x 1188
A2: 420 x 594
A4: 210 x 297

A4 is 4 times shorter than A0, so 50*4 is 200, 1:50 becomes 1:200

 

[neil_g]

Should be -

1:50 @ A0 = 1:100 @ A2 = 1:400 @ A4

So 1cm should be 400cm

But just double check that against some known values

Sounds about right. Cheers

Trouble is I have no known values, all I have is these drawings with no measurements only the scale "1:50@A0".

The building isnt out of the ground and I need to make a plan for installing lan and wlan.

 

[Maccapacca]

I use foxit then set the scale every time I measure. Scales are never right, they either detail them wrong or they just don't work through conversion from CAD to PDF or similar. I usually check by measuring doorways or front doors or roads if there's no dimensions to see if I'm on the right track and then decide how accurate I need to be depending on what I'm doing.

 

[jumpy]

You could always try measuring geometry in the pdf in adobe if you have it.
Do you have access to something like Autocad? If so the latest version can import geometry from pdf so you can scale it to the right size for your drafting.

 

[Steeps]

Should be -

1:50 @ A0 = 1:100 @ A2 = 1:400 @ A4

So 1cm should be 400cm

But just double check that against some known values

Sounds about right. Cheers

Trouble is I have no known values, all I have is these drawings with no measurements only the scale "1:50@A0".

The building isnt out of the ground and I need to make a plan for installing lan and wlan.

Right result, wrong workings. It will be 1cm = 400cm because going from A0 to A4 would be 4x longer. If the scale at A0 was 1:100 then the A4 scale would be 1:400. As the A0 scale is listed as 1:50 the A4 scale would be 1:200.

 

[Scrutinize]

There is a good chance it won't scale correctly from A0 to A4. Unless the drawing states a specific scale at various print sizes then it can be out and when reducing copy size it can end up by quite a big margin.

Do you have the measuring tools in pdf where you put the scale in and measure away on screen?

 

[lude1962]

the architect should have put all the measurements on the drawings,
and it should have a 'scale bar' (probably incorrect term) compare measured lengths to scale bar

 

[Marky]

I work on drawings in the Commercial Catering Industry and I can guarantee you if you print that PDF in A4 it won't be to any scale

If you had the actual CAD file it would work, but because you're printing a PDF it won't scale correctly at A4.

 

[Cold Fusion]

Does the drawing have a dimension or scale bar?

You could always download Autodesk Design Review (which is free) and you can measure dimensions on that

 

[LOAM]

about 1:217 depending on what the original Autocad output margins were. In reality though as someone above said, NTS!

 

[neil_g]

And my head is hurting again..

Okay, I'll go back and request some measurements to use as a Base.