The width of the staircase section of the university student activity center is between 75 cm and 90 cm. The best landing size of the university student activity center is 1. 1 m *2 m, and the indoor railings and handrails should not be less than 90cm. The staircase of spiral staircase should not be less than 75cm, and the width of staircase of traditional staircase should not be greater than 10cm.