Category Archives: Structures

NMRA Clearances for N Scale

Introduction These are the clearances for bridges, structures and tangent tracks for Old Time (pre-1920), Classic I (1920–1969), Classic II (1969–1983), and Modern (post-1983) eras. The numbers here are for N scale (1:160). The prototype (1:1) dimensions are given for conversion to other scales or you can check the NMRA standard to get information for other scales. The numbers… Read More »