Following Ed Nadolski's example, I use Andy Reichert's Proto87 exact-scale spikes (.010" diameter shank) to secure ME code 40 guardrails to the deck of a Kato through truss bridge.
All spike holes were pre-drilled with a #85(.011") drill bit and spikes carfully inserted. Rail was then slid into place, and spikes pusheddown into final holding position.
Photos of the finished installation below. Look very closely and see if you can find the spikes!
--
Donnell M. Wells