Maximum rise of stair step

• 20 m

• 200 mm

• 2 cm

• 200 cm

Minimum run of stair step

• 25 m

• 250 mm

• 2.5 cm

• 250 cm

Total width of stairs with more than 50 occupant load

• 1.20 m

• 1.10 m

• 0.90 m

• 0.75 m

Total width of stairs with less than 50 occupant load

• 1.20 m

• 1.10 m

• 0.90 m

• 0.75 m

Total width of stairs with less than 10 occupant load

• 1.20 m

• 1.10 m

• 0.90 m

• 0.75 m

Width of Aisle A

• 600 mm

• 800 mm

• 1000 mm

• 1100 mm

Width of Aisle B

• 600 mm

• 800 mm

• 1000 mm

• 1100 mm

Width of Aisle C

• 600 mm

• 800 mm

• 1000 mm

• 1100 mm

Minimum spacing of rows for standard seating from back-to-back

• 810 mm

• 820 mm

• 830 mm

• 840 mm

Minimum spacing of rows of seats for bleachers measured back-to-back in open stands without backrests

• 600 mm

• 650 mm

• 750 mm

• 850 mm