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RE: Which way is up? (North arrows)

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I have worked on a number of projects where the building is at a skew (even
45 degrees) to north.  Generally a "project north" is quickly developed, and
this will generally be up or to the left.  I suppose that north could be
down the sheet if there was some compelling reason to align the building on
the sheet that way.  Many buildings are shown with their main entrances at
the bottom of the sheet (I suppose for architectural reasons), and this
could take precendence even if this was the north face if the architect so
chooses.   In every project I have worked on, every just follows the
architect's lead and orients the building in the same manner as shown on the
architectural.  Generally only small drawings such as the elevator drawings
will be shown with different orientations.  

Paul Crocker

-----Original Message-----
From: Sherman, William [mailto:ShermanWC(--nospam--at)cdm.com]
Sent: Monday, December 11, 2000 10:35 AM
To: SeaInt Listserver (E-mail)
Subject: Which way is up? (North arrows)


I'm curious as to whether there is any "consensus" in how to handle north
arrows when north is shown other than "up" on a plan sheet. For example for
a long rectangular structure, it is often more convenient to draw the
structure with the north arrow shown either to the right or to the left - is
there a preferred direction? On some projects, the structure is skewed up to
45 degrees rather than orthogonal to north - how do you handle showing
"north" for such structures? Occasionally I have seen drawings with the
north arrow shown "down" on a plan sheet - what basis would there be to show
north down? (It seems contrary to intuition since most maps are drawn with
north "up".) 

Also, has anyone encountered problems on projects where different sheets for
the same structure show north oriented differently? (e.g., mechanical sheets
with north to left and structural sheets with north to right - problems such
as mechanical or structural elements field located in the wrong place due to
confusion in direction.) 


William C. Sherman
Camp Dresser & McKee, Inc.
Denver, CO
Phone: 303-298-1311
Fax: 303-293-8236
email: shermanwc(--nospam--at)cdm.com