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Viewing plans on screen

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Paul

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Dec 29, 2009, 12:13:04 PM12/29/09
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When reading plans on screen, they have a scale such as 1:100 however
lacking the original paper plans I cannot see how to zoom the drawing
such that it accurately reflects the intended scale so that measurements
taken from it on screen are accurate, or even approximately accurate.
I'm not using a CAD program but just looking at .pdfs from planning apps.

Has anybody here done this and found a commonly used marker on the
drawing that equates to an established length such that a drawing on
screen may be zoomed to match that declared length?

TIA
PB

Cwatters

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Dec 29, 2009, 12:55:31 PM12/29/09
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"Paul" <pa...@NOSPAMcamtutor.co.uk> wrote in message
news:7purkv...@mid.individual.net...

It's very bad practice to scale off drawings. The planners should really
insist that some key dimensions are provided on planning application
drawings.

Without a scale bar you can't do what you want reliably. However you could
try assuming the originals were originally on standard size paper (A0, A1,
A2 etc). However this won't work if the drawing was cropped or expanded when
scanned. Sometimes they are overscanned and you can see the edges of the
original paper used. Beware some photocopiers scale drawings differently in
x and y.

If accuracy matters go to the planning office and ask to see the originals.


Paul

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Dec 29, 2009, 2:20:25 PM12/29/09
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Cwatters wrote:
> "Paul" <pa...@NOSPAMcamtutor.co.uk> wrote in message
> news:7purkv...@mid.individual.net...
>> When reading plans on screen, they have a scale such as 1:100 however
>> lacking the original paper plans I cannot see how to zoom the drawing such
>> that it accurately reflects the intended scale so that measurements taken
>> from it on screen are accurate, or even approximately accurate. I'm not
>> using a CAD program but just looking at .pdfs from planning apps.
>>
>> Has anybody here done this and found a commonly used marker on the drawing
>> that equates to an established length such that a drawing on screen may be
>> zoomed to match that declared length?

<snip>

> It's very bad practice to scale off drawings. The planners should really
> insist that some key dimensions are provided on planning application
> drawings.
>

<snip>

Thank you for your helpful comments. I do find it odd that a planning
app can be put forward and passed without x and y room dimensions but
only floor areas.

PB

The Natural Philosopher

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Dec 29, 2009, 9:07:15 PM12/29/09
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I have printed out PDF plans and found they scaled exactly.Usually 1:50
Message has been deleted

The Natural Philosopher

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Dec 30, 2009, 5:38:29 AM12/30/09
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Dave {Reply Address In.Sig} wrote:

> The Natural Philosopher wrote:
>
>> I have printed out PDF plans and found they scaled exactly.Usually 1:50
>
> It's still not a good idea to take measurements from a drawing if accuracy
> is required. If you just need to know to the nearest few inches then it's
> not a problem.
sometimes it is all you have..

Cwatters

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Dec 30, 2009, 6:16:57 AM12/30/09
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"Dave {Reply Address In.Sig}" <noone$$@llondel.org> wrote in message
news:vbkr07...@llondel.org...

> The Natural Philosopher wrote:
>
>>
>> I have printed out PDF plans and found they scaled exactly.Usually 1:50
>
> It's still not a good idea to take measurements from a drawing if accuracy
> is required. If you just need to know to the nearest few inches then it's
> not a problem.
> --
> Dave
> da v...@llondel.org (without the space)
> So many gadgets, so little time.

Just be a little careful with height. May need that to within 150mm (6") or
you can fall outside Permitted Development.


Paul

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Dec 30, 2009, 6:30:41 AM12/30/09
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It's ok I'm not building anything I was just perusing some plans of
interest to me, I won't be taking measurements from drawings to build, I
just wanted to know the room measurements and I can get that to within a
few centimetres which is sufficient.

PB

The Natural Philosopher

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Dec 30, 2009, 7:14:20 AM12/30/09
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generally you can rely on things like door widths to be regulation width
for wheelchairs plus a mm. ;-)

Think its 850mm.

Message has been deleted

Jon Green

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Dec 30, 2009, 9:21:18 AM12/30/09
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On 30/12/2009 12:40, Dave {Reply Address In.Sig} wrote:
> The Natural Philosopher wrote:
>
>> generally you can rely on things like door widths to be regulation width
>> for wheelchairs plus a mm. ;-)
>>
> Painted or unpainted?

Unpainted wheelchairs only.

Jon
--
SPAM BLOCK IN USE! To reply in email, replace 'deadspam'
with 'green-lines'.

The Natural Philosopher

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Dec 30, 2009, 10:35:38 AM12/30/09
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Dave {Reply Address In.Sig} wrote:
> The Natural Philosopher wrote:
>
>> generally you can rely on things like door widths to be regulation width
>> for wheelchairs plus a mm. ;-)
>>
> Painted or unpainted?

Very good pint!

You will have to ask a BCO!


Roland Perry

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Dec 30, 2009, 11:31:27 AM12/30/09
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In message <hhfs0a$jvh$1...@news.albasani.net>, at 15:35:38 on Wed, 30 Dec
2009, The Natural Philosopher <t...@invalid.invalid> remarked:
>Very good pint!

Mine's an Adnams, thanks.
--
Roland Perry

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