topic Re: change walk line in spiral stair in Modeling

change walk line in spiral stair

Tom Krowka — Thu, 25 May 2023 14:37:38 GMT

Anyone know how to change the walk line location in a spiral stair? walk line 23 and regular walk line will only keep to the center of the stair. And it appears that the tread depth is measured at the walk line. I need to change the walk line location to work out spiral stair tread dimensions per building code walk line, which is not at the center of the stair.
THanks Tom

Re: change walk line in spiral stair

David Maudlin — Fri, 14 Aug 2020 11:59:43 GMT

Tom:

The Walking Line can be edited by selecting the Stair, clicking the Edit button, then changing from Schematic to Symbol in the Edit Stair palette. The Walking Line can now be selected and edited like a polyline. I tried this with a circular stair with a Label attached to read the treat depth, but changing the location of the Walking Line did not affect the label's values.

David

Re: change walk line in spiral stair

Tom Krowka — Fri, 14 Aug 2020 13:09:18 GMT

Tried and and was able to change the diameter. However the start and end symbols of the walk line appear fixed and can't move, so the walk line is off centered and not much use. It appears that the tread width is measured at the walk line. If you change the tread dimension in the settings it can be measured at the walk line as the tread dimension setting.

I think that the custom dimension in the walk line floor plan display setting is locked to center of stair width or grayed out and not available for a spiral stair. Shouldn't be this difficult.

Thanks Tom

Re: change walk line in spiral stair

David Maudlin — Fri, 14 Aug 2020 13:38:38 GMT

Tom wrote:
Tried and and was able to change the diameter. However the start and end symbols of the walk line appear fixed and can't move, so the walk line is off centered and not much use.

The Walking Line ends can be moved: once the Walking Line is selected, move the cursor to an end, a check mark appears, click here and the end point can be dragged.

David

Re: change walk line in spiral stair

Tom Krowka — Fri, 14 Aug 2020 13:51:04 GMT

Got it. Pretty tricky. Will experiment to see if I can determine relationship between tread width and walk line. Spiral stair am trying to work out is inside the circle diameter, not the outside of the circle diameter. It should all work the same I imagine.
Thanks for the replies. Appreciated.
Tom.

Re: change walk line in spiral stair

Lingwisyer — Mon, 17 Aug 2020 02:44:54 GMT

T = (360X + πθW) / 360

T being your Tread
X being your Desired Tread
W being the difference between the radius of your Tread and Desired Tread.
θ being the angle of each Tread. eg. 15 treads for a stair that makes half a revolution. θ = 180 / 15 = 12