Thin Branch Series: Build a Bridge part 3 – Guardrails By Kent Johnson | May 23, 2013 | Last updated on February 23, 2024 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates In this video (part 3 of 4), David shares techniques for adding trackwork guardrails to a through-girder bridge kit.