Ka jingkhein ia ki step da kaba pynkylla 90° .

Ka jingkhein ia ki step da ka jingkylla kaba 90 .°

Sngewbha pyni ia ki jingthew ba donkam ha ki milimitar

X - ka jingjrong jong ka jingplie kaba ka jingkieng kan shim
Y - ka jingjrong na ka kyrdan mala jong ka mala kaba nyngkong haduh ka kyrdan mala jong ka mala kaba ar .
E - Ka jingheh jong ki step
F - Ka jingjrong jong ki step
Z - Ka jingkhluit jong ka step

C - jingkhein jong baroh ki kyrdan
P - Ka jingkhein ia ki step + madan ialehkai

Ka jingkhein ia ki step kiba kylla ka long katto katne kaba kham jynjar ban ia ka jingkhein ia ki step kiba beit.
Ia ka jingkhein ia ka jingsuk jong ki step la khein da kaba pyndonkam ia ka formula kaba pynshong nongrim ha ka jingjrong jong ki step.
Ka jingjrong jong ka step jong u briew ka long naduh 60 haduh 66 cm, bad ka jingjrong kaba pdeng ka long 63 cm.
Ka jingkieng kaba suk ka iadei bad ka formula: 2 tylli ki jingjrong + ka jingjylliew = 63±3 cm.

Ka jingkynriah kaba suk tam jong ki step ka long naduh 30° haduh 40°.
Ka jingjylliew jong ki step jong ki step ka dei ban iadei bad ka jingheh jong ki juti 45 - ym duna ia ka 28-30 cm.
Ia ka jingbym don ka jingjylliew lah ban pyndap da ka jingmih shabar jong ka step.
Ka jingjrong jong ka step ka dei ban long haduh 20-25 cm.

Phi lah ruh ban ioh ia ka jingsuk jong ka jingkieng kaba kylla da kaba pynkylla ia ka jingjrong jong ka rynsan.

Ka prokram kan dro ia ki dur jong ka step kaba kylla ryngkat bad ki angle bad ki jingthew ba kongsan.
Ki dur ki pyni ia ki jingthew ba kyllum jong ki step, ki dak jong ka tduh jong ki step ha ki string, ki tduh jong ki step bad ki jingthew ba kongsan jong ki step hi.