US steel trestle. Made as a normal trackspline. I wish to express my gratefulness to 'bendorsey' for his 'wood' texture and also to Madeline Usher for allowing me to use as texture a lateral shot of her 'Plate Girder Bridge, bendy', and also to 'Pencil42' for his availability to offer his 'pin_truss_bridge' texture (with or without modification) to everyone who wants to use it.