This bridge which Brian will build for your,is an American Curved Logging Style wooden Trestle Bridge.
This bridge can be ballasted if needed.
All you need to do is let us know what code of track you require and Brian will install it. The ballasting will be your responsibility.
This bridge is HO scale and is 640mm long, stands 93mm high has a 36 inch radius curve for smooth running. Hand cut timbers are 1/8th square which
equals 12 inches in real life.