The idea behind them is your foot only uses half of the stair so you can cut the other half out to allow more step up room between treads that would otherwise overlap the space savings of a ladder but will full treads and a reasonable rise.
Alternating tread ladder plans.
As i can provide slipresistant stair inc bim content alternating tread each of your spiral and can have standard rise and.
The unused half tread is removed to provide more tread depth for improved safety and comfort.
Designed to be used as a stair with users facing the direction of travel when climbing up and down.
I ve done alternating tread stairs before also called ship ladders.
You can save at least the half of the space without the problems of having smaller steps.
Industrial stairway crossover footprint.
Its a little bit dificult to make the ma.
The steeper the angle the larger the rise.
Industrial stairway with platform footprint.
Alternating tread stair plans stairs may not seen many alternating tread staircases made to measure.
Stair slope of either 56 or 68 degrees requires a smaller overall footprint than a standard stair.
But with an alternating tread stair the difference in height between the right and left treads is the unit rise using the guidelines of commercially built alternating tread stairs i try to get the unit rise between 6 1 2 in.