N: DIY-Viaduct for KATO-Unitrack, Double-Piers

For single track viaducts see:
https://www.printables.com/model/1243316-diy-piers-for-viaduct-for-kato-unitrack

Here are Piers/pylons for KATO’s viaduct double tracks in two styles, one that fits to single track piers (23-015…017) and the others, that fits to KATO’s double track piers (23-019), the last of which Kato offers only standard height. 

Compared to original piers here you can find piers in 5mm steps up to a height of 120mm giving a smooth ramp to never reached heights of viaducts. 

The height is defined from ground level to the level on which the Unitrack is based on. The standard height of KATO’s viaduct (called Number 5) is 60mm. The 120mm is therefore a 2nd level of viaduct. The 70mm height corresponds to the level of T-Trak-modules, that are based on KATO’s unitrack system. 

To fit the viaduct track onto the piers you need the so-called S-Joiner, that are offered by KATO under number 24-817 (20 pieces). I recommend using these original parts, although there is a DIY-version available, designed by 3DSandwich:

https://www.thingiverse.com/thing:4814862/files

In my experience the DIY-version tends to break, if printed in PLA and is not easy to print in ASA, although strength would by sufficient in such case.

Designing the pierce I had a look also on existing ones from rimmer2049 and magnuse:
https://www.thingiverse.com/thing:6275116/files
https://www.thingiverse.com/thing:4793384/files

But in my final design there is nothing left from them, especially as their joiner fixing tents to break easily and I had to redesign it to another principle to make is reliable.

Beside the piers used at intersections of viaduct tracks Kato offers under Number 23-016 also intermediate piers for longer tracks, to get a more realistic appearance of the distance between piers. This set is hardly to get in Europe, and I don’t have one. But I created my own intermediate piers with its own bearing. The last one goes only with the DIY-viaducts and will not work with KATO’s original viaduct track by technical reasons.

The first part of evaluation of tracks up to the level of the pier 0 you may use my earlier design:
https://www.printables.com/model/682214-katounitrack2lego-support-n-gauge
https://makerworld.com/en/models/62792-katounitrack2lego-support-n-gauge#profileId-65426

Please note:
“Kato” and “Unitrack” are trademarks of K.K. Sekisui Kinzoku, Japan. All trademarks are used for reference only. The design presented here is neither supported nor authorised by the before mentioned trademark holder(s).

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.