Alternating Tread Ladder Details

Aluminum alternating tread stair is an alternative to a traditional ships stair.

Alternating tread ladder details.

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. Compared to conventional stair treads these stairs allow the user to descend face forward giving a clear view of the floor below. Industrial stairway crossover footprint.

The steeper the angle the larger the rise. Designed with tubular side rails to provide maximum structural integrity while keeping the overall stair weight to a minimum. 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. 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.

I ve done alternating tread stairs before also called ship ladders. As with all precision s products these stairs are built to project conditions and shipped to the job site completely assembled ready for installation. Stair slope of either 56 or 68 degrees requires a smaller overall footprint than a standard stair.