Mechanical Stair Design Drawing with Tread Riser and Step Sizes

This mechanical stair design AutoCAD drawing provides detailed technical information for industrial and commercial stair planning. The drawing clearly shows a stair layout with a step arrangement composed of tread and riser elements designed for safe movement. Plan and sectional details illustrate stair width, riser height, tread depth, nosing line, and landing position. All measurements are given in millimetres, including overall stair length, height rise, number of steps, and clear width, making the mechanical stair design suitable for architects and civil engineers working on structural and mechanical access solutions.

The mechanical stair detail also explains construction aspects such as step thickness, support framing, fixing points, and walking line.