Sure thing. Moving big things, a fair distance to fake them in. Heck, that
doesn't work for me either. We used to call these "cartoons" back when I made
drawings for a living.
CAD Systems measure stuff down to 16 decimal places (distances and angles). As you know Pipe fitters measure the same things during assembly down to about a 1/16" (if you're lucky). Its really no CAD trick to tell a 3d modeling system how much misalignment is allowable while connecting two components. By default AutoPLANT allows 1/16" measured at the outside diameters. Since various organizations have their own standard for how much miter is allowed to a butt-welded connection the program provides a way to increase the value as required. I was hoping to hear is there was a defacto standard for this or if some additional requirement appeared during this string.
On Sep 21, 2004, at 9:20 AM, Rich Scotti wrote:
> Note that this is sent off-list. I notice that you come across
> aggressively on this issue (CAD Software and sloped pipe). Is this a
> topic of some specific concern to you? Do you have an issue with
> AutoPLANT software specifically?
Didn't mean to be aggressive--just sarcastic. The thread started out
when someone asked about a construction detail to allow for slope. The
flow would turn something like 90.08 deg instead of the theoretical 90
deg, and the question was how to specify a joint like that. Someone
suggested a miter connection as I recall, and depending on the
connection you could easily modify a standard elbow to make a 90.08
turn. I took fairly gentle exception to the notion proposed by someone
that you simply use an AutoCAD trick to give the appearance of a
designed detail, rather than actually doing the design. I still take
exception to CAD tricks like that, because I've had to cope with too
many of them. A CAD representation isn't just a lo0vely picture--it's
intended to communicate design intent, so that the system can be made
in a specific way to accomplish a specific job. Faking design details
like the elbow is just as bad as moving a reservoir to make a building
fit between the reservoir and the road.
Christopher Wright P.E. |"They couldn't hit an elephant at
chrisw@skypoint.com | this distance" (last words of Gen.
...................................| John Sedgwick, Spotsylvania 1864)
<a href="http://www.skypoint.com/~chrisw">http://www.skypoint.com/~chrisw</a>
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[Non-text portions of this message have been removed] Received on Tue Sep 21 12:13:00 2004
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