Stairs 4-run design

Quick answer：

The 'Stairs 4-run design' refers to a design for staircases where each step has four risers (the vertical parts) and four treads (the horizontal parts). This design is common in residential and commercial buildings. It ensures proper stair dimensions for safety and ease of use. Key considerations include riser height, tread width, and the overall stair dimensions to comply with building codes and accessibility standards.