Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Re: Level of Detailing - round 2

[Subject Prev][Subject Next][Thread Prev][Thread Next]
        I'm sure that any of the older engineers on the list will be able to confirm that the origin of the practice of not scaling drawings originated from the fact that the liquid based printing processes of the 1950s and 1960s stretched the paper when printing.  As a result the prints were not reproduced to the same scale as the drawing originals.  Not only that the change in scale was more in the long direction of the paper role than in the short direction.
        Never the less, I scale drawings when I wand information that doesn't seem to be readily available.  For design calculation purposed it doesn't really matter if a 20'- 0" is really 20'- 3" or 19'- 9" when you're calculating wl^2/8.  A detailer for a steel fabrication shop trying to make a bolted connection fit wouldn't agree with that though would he?
H. Daryl Richardson
P.S.  I also realize there are no "older " engineers on this list; only some engineers who are a little more mature and a little less young than the E.I.T. people.  You may have to actually leave the list to find any "older" engineers!
----- Original Message -----
From: dave lowen
Sent: Sunday, August 20, 2006 11:55 AM
Subject: RE: Re: Level of Detailing - round 2

I spent a little time doing an informal survey of estimators, PM?s, draftsmen, shop and field people and found that about one in six owned a scale. Most of the younger people had never bought one. Some of the folks that owned one said they seldom used it, some said they never did, one said his is in a drawer somewhere at home.


One of the reasons I was given for this is that although a majority of architects and engineers specify scales on every plan, view, section and detail, there is also a covering note that the drawings are not to be scaled. I would suggest those that practice this to not waste money putting the scale on the drawings.


Another reason is that many people who use your drawings have new furniture that does not lend itself to the massive drawing sizes some firms use so they have them plotted no larger than 24 x 36 which makes the scale redundant.


My work is initially drawn to scale as Will suggests but all drawings are noted ?do not scale?. My reason for doing this is to cover any subsequent changes where only the dimensions and not the picture are changed. This is not laziness on my part, it is economics.



Dave Lowen

V 519 587 5797

F 519 587 5138

E jatech(--nospam--at)


-----Original Message-----

From: Will Haynes <gtg740p(--nospam--at)>

Date: 2006/08/12 Sat PM 02:02:11 CDT

To: seaint(--nospam--at)

Subject: Re: Level of Detailing


As an Architect and builder, I see absolutely no reason why every aspect of a structural design isn't drawn to scale.  IMO its pure laziness that details are drawn NTS.  With the sophistication of CAD programs today, there is no excuse for not drawing to scale.