> Also, as someone pointed out the other day, the pins don't go through
> the rails. This is because the rails expand and contract based on the
> weather. If they were nailed down as per your drawing, they'd end up
> shearing the pins and/or getting deformed.

You're both right. Sometimes they _are_ pinned in, as per the attached
picture, but for this kind of track application, rails are normally clipped
in. See http://www.norfast.com/ or http://www.pandrol.com/ for some
excellent pictures of rail fasteners.

Joanne
(who spends a lot of time around railways but is not any kind of anorak...)

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