staircase stretch out, an explanation.
The staircase stretch out is used to show the flow of the handrail.
It is created by taking the cord length of each individual going under the handrail centre line position.
These are then placed in order end to end and raised to their relative rise position.
Any landings between flights should also be drawn in.
A line can be drawn across the intersection of the rises and goings.
From here you can draw in the curves for the handrail flow, to confirm how the handrail will flow around the stairs.
If there are any nasty kinks in the handrail flow once this has been carried out, thene you can adjust the goings to soften the curve and make the handrail flow smoothly.