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.
Alternating tread stair cad details.
Precision s aluminum alternating tread stair is an alternative to a traditional ships stair.
Here are some suggestions about how to build this type of design.
Baked in powder coat finish for added toughness.
Features handrail on each side of unit dual safety chain at the top of the stair and formed steel steps with raised surfaces for better traction.
Welded steel construction with bolt on handrails.
These stairs allow the user to descend face forward giving a clear view of the floor below.
However it is quite steep and a bit scary to go down head first most people turn around like you would on a ladder.
The unused half tread is removed to provide more tread depth for improved safety and comfort.
Technical resources get measuring guidelines product dimensions and connection details for alternating tread stairs.
Sketch problem 6 8 04 this type of stair saves lots of space and can have standard rise and run dimensions to meet code.
Most building codes will allow this type of stair into lofts of 250 sf or smaller.
Alternating tread step design offers a shorter span than traditional steps.
Stair slope of either 56 or 68 degrees requires a smaller overall footprint than a standard stair.
Manufacturers of alternating tread stairs browse companies that make alternating tread stairs and view and download their free cad details revit bim files specifications and other content relating to alternating tread stairs as well as other product information formated for the architectural community.