DIY-Viaduct for KATO-Unitrack, wider version, n-scale

Some of the longer coaches or wagons cannot pass the tight curves of Kato’s viaducts.

Of course, tighter radii are always a compromise between reality and the space available for a model railway layout, but for those cases where a tighter radius is needed, here I offer DIY viaducts with slightly wider spacing between the railings. This won't always solve the problem, but it's sufficient, for example, to allow the Kato’s nice ICE4 to pass through curve R282-viaduct.

Hope you enjoy these extended possibilities to create viaducts with KATO’s great track system. Happy printing and a lot of fun with your model railway layout!

Update 2026-07-12: Added a pier 0 fitting to wider viaducts (normal one would work as well, but doesn't look that nice).

Please note:
KATO’s Unitrack is the first and only choice in n-scale for mobile layouts and one of the best track systems in general:
https://unitrack.katomodels.com/what_is_uni_track
But “Kato” and “Unitrack” are trademarks of K.K. Sekisui Kinzoku, Japan and are used for reference only. The design presented here is neither supported nor authorised by the before mentioned trademark holder.

Please note the license:
My design is published under the CC BY-NC-SA license, which means that you can freely use this model for any non-commercial purpose and may remix this model freely as long as you provide attribution and share with the same creative commons license. Feel free to contact me if any questions.