reducing a scale drawing

[sawdust1]

Hi. I have drawn out a kitchen extension plan an A3 paper to a scale of 1/50 floor plan and 1/100 for the elevation but want to reduce them onto A4 paper but this will alter the scale. I have checked on a scale rule and nothing will marry up, how can it be done ?

 

[Sporky McGuffin]

If I remember correctly it's a factor of √2 to go up a size, so it'll be 1 / √2 to go down.

In simpler terms, that's multiply by 1.414 to go up and 0.707 to go down, so you're looking at scales of about 1:71 and 1:141 respectively. If your scale rule has 1:150 and 1:75 then you could use a photocopier to scale to 75% - it should just fit onto A4 then, as long as you've not drawn right up to the edges of the A3.

 

[MusicMan]

+1 for Sporky's comment.

 

[sawdust1]

Thanks sporky i will give it a go. Can you get scale rules with 1:150 and 1:75 as mine does not have these on it ?

 

[bugbear]

Thanks sporky i will give it a go. Can you get scale rules with 1:150 and 1:75 as mine does not have these on it ?

Just learn Sketchup and have done with it.

BugBear

 

[Brentingby]

Thanks sporky i will give it a go. Can you get scale rules with 1:150 and 1:75 as mine does not have these on it ?

Just learn Sketchup and have done with it.

BugBear

I was thinking that, too.

 

[sawdust1]

Hi bugbear, i come from the era of pen and paper and at 56 i could not be fussed to lean sketch up. This is my first planning application and
will probably be my last. Unfortunately i drew i all out on 5 pages of A3 and did not realise the council wanted 4 copies of each, one set for
listed building and one set for planning, thats 40 copies which would be a lot cheaper if i can get them down to A4.

 

[AndyT]

Big photocopiers make it all very easy - just put your A3 original on the glass and select A3>A4 on the on-screen menu!

 

[Sporky McGuffin]

You could do the architect cheat - photocopy using the A3>A4 setting as AndyT suggests, and write "Scale - 1:50 at A3" or "Scale - 1:100 at A3" in the corner. Make them do the maths.

Having checked my scale rule, 1:75 and 1:150 don't feature, so my first suggestion wasn't brilliant - sorry!

 

[Sporky McGuffin]

Amazon do have scale rules that include 1:75 and 1:150, but not 9that I've found) both on the same rule...

 

[AndyT]

If you include a scale line on your original drawing, it will reduce in the same proportion as the drawing, and remain true. No calculations required.

 

[Sporky McGuffin]

True, but from experience dealing with drawings on the wrong paper (so the scale is "off") it does make it much harder to interpret the drawings compared to if you can use a scale rule.

You're absolutely right that there should be a scale line and/or block though.

 

[sawdust1]

Thanks everyone, best end the thread here as their are plenty of idea's.