The unused half tread is removed to provide more tread depth for improved safety and comfort.
Alternating tread ladder details.
Precision ladders at series of aluminum alternating tread stairs were designed with tubular siderails to provide maximum structural integrity while keeping the overall stair weight to a minimum.
Stair slope of either 56 or 68 degrees requires a smaller overall footprint than a standard stair.
Industrial stairway crossover footprint.
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.
I ve done alternating tread stairs before also called ship ladders.
Industrial stairway with platform footprint.
Aluminum alternating tread stair is an alternative to a traditional ships stair.
The steeper the angle the larger the rise.
As with all precision s products these stairs are built to project conditions and shipped to the job site completely assembled ready for installation.
Designed with tubular side rails to provide maximum structural integrity while keeping the overall stair weight to a minimum.
Alternating tread ladder crossover 2 alternating tread ladders connected by a platform industrial stairway calculate space requirements at various heights and angles.