Type of Connection Case(i) Case(ii) Case(iii) Case(iv) Case(v) Case(vi) Case(vii) ( F ) ( F-1 ) Crossing No. 1 in 8.5 1 in 12 1 in 16 1 in 16(HS) 1 in 20 1 in 8.5 1 in 12 1 in 16 1 in 16(HS) 1 in 20 Rail section 60KG 52KG 90R Type of Crossing CMS CMS(W) ORDY(W) Type of Switch CFH SLH Radius of Connecting Curve(R)-mm Radius(mm) 1 in 8.5 1 in 12 1 in 16 1 in 20 Custom Radius of Connecting Curve(R1)-mm Radius(mm) 1 in 8.5 1 in 12 1 in 16 1 in 20 Custom Distance Between Tracks(D)-mm Straight:behind Xing(S / S1)-mm Bet.Rev.curves(SM)-mm