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Im making a water tank and to its side i want to make spiral stairs. I have tried 2 method but did not work for me both. I have add a spiral curve so that a single stair can rotate along the curve with the dupliframes. Then i added a array modifier and empty to control. I got this result the stairs not matching the side walls. And i want the result of the curve rotating in that way i want my stairs to be curved. Any suggestion

New result with empty enter image description here

With screw modifier result

enter image description here

enter image description here

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  • $\begingroup$ Related blender.stackexchange.com/questions/66716/… $\endgroup$ – Duarte Farrajota Ramos Apr 21 '17 at 13:14
  • $\begingroup$ @DuarteFarrajotaRamos i have update the new result as per the link but not get the result what i need. I have a curve in my model i want that way it should take 3-4 turns. And here im getting just a single turn. and side railing also not align perfect $\endgroup$ – atek Apr 22 '17 at 4:20
  • $\begingroup$ @DuarteFarrajotaRamos i have added the screw modifier the curve result i have got but the stairs not going up and down. For that what can i do any suggestion $\endgroup$ – atek Apr 22 '17 at 4:34
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A suggestion is to use the Screw modifier for the railing walls & keep the array for the steps. You can control the height of the screw with an empty and the diameter either by scaling in object or edit mode.

enter image description here

enter image description here

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  • $\begingroup$ Thanks for replying with the railing and stairs merge with single mesh can i make the screw modifier instead of doing manually with empty $\endgroup$ – atek Apr 21 '17 at 12:48
  • $\begingroup$ The screw modifier would deform the steps - which is why I kept it separate. You can eventually 'Apply' and join the meshes if necessary. $\endgroup$ – Patdog Apr 21 '17 at 13:17
  • $\begingroup$ can you plz send me the file how you have control im not getting the same result you have $\endgroup$ – atek Apr 22 '17 at 13:22
  • $\begingroup$ Done. If you extend the spiral up more - you will have to adjust the z-height of the steps. $\endgroup$ – Patdog Apr 22 '17 at 17:59
  • $\begingroup$ having problem again with the stairs i have posted the question blender.stackexchange.com/questions/78333/how-to-align-steps $\endgroup$ – atek Apr 23 '17 at 9:54

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