HO scale railway bridge

An H0-scale bridge for railway modeling.

The length is 230mm, about maximum I could fit into my printer. Most parts required 45 degrees rotation. Internal width for trains is around 54mm, full width is around 75mm.
Internal height is 65mm. Internal dimensions match the requirements of NEM 102 Standard.
Height from bottom surface to track floor (floor thickness) is 4mm.

**Update 2022/05/06.** I've added roof section. It should provide better rigidity and looks.