Foot Pressure
https://gyazo.com/c9a1be4527efdbcdf3cacb253f7b5940
body weight: 63kf, with shoes
Maximum vertical: 80N / pillar = 200kPa
-> 7.5 of (20mm)^2 mini tiles -> 3*2.5. Almost equally distributed through 60mm^2 tile!!
Maximu horz: 15N / pillar = 37.5kPa
With properly fit sandals, it might be even possible to walk on raw RR array....
https://shingi.jst.go.jp/past_abst/abst/p/14/1468/life03.pdf