Ken, If you can neither move your building nor your track, can you cut back the building corner to give clearance? This was done in prototype practice, and would give you a building that looks a bit different to the usual rectangular box. Regards, Bill.
>
> Ken Bessler wrote:
> > I just put down some track curving around the corner of a building
> > in N scale. My NMRA gauge says I have about 1mm clearance
> > between the side of the gauge and the corner of the building's roof > > edge.
> >
> > Running a train with 50' box cars, the cars come awfully close to the
> > roof edge but miss it.
> >
> > What I'm worried about is if I buy some of those larger, newer gen-
> > eration diesels like AC4400 or SD90M's I see on ebay, will they hit > > the corner?
> >
> > Or, am I safe as long as the NMRA gauge says so? The curve is the
> > inside track of three, with radius's at 11", 12.25" & 13.5"... > >
> > Moving the structure is out and moving the curve would mean moving
> > all three (forget it). The track is *not* critical as it is only a yard lead
> > and the only engine that will ever use it regularly is a GP7 or RSC2. > >
> > Help?
> >
> > Ken
>
> The NMRA gage does not account for rolling stock overhang on curves. It
> solves the "straight track problem" i.e. given a straight track how
> far back do station platforms, bridge uprights and tunnel entrances have
> to be to avoid getting hit?
> On curves, the longer cars lean in more than shorter ones, and the
> sharper the curve the worse things become. A single gage cannot answer
> all the combinations of car length and curve sharpness. So, if your 50
> footers are coming close, you can expect longer rolling stock to come
> closer. Maybe too close.
> At the club we have "clearance cars" built to check that new
> structures don't get so close as to cause derailments. Lacking a
> special clearance car, you might purchase one of those 80 foot oversized > boxcars
>
> David J. Starr
>