The Ontario Building Code | Fixed Bench-Type Seats without Arms
220.127.116.11. Fixed Bench-Type Seats without Arms
(1) If fixed bench-type seats without arms are provided, the seat width per person shall be assumed to be 450 mm.
(2) The centre-to-centre spacing between rows of bench-type seats shall be not less than 760 mm if back rests are provided, and not less than 550 mm if back rests are not provided.
(3) A clear space of not less than 300 mm shall be provided between the back of each seat and the front of the seat immediately behind it.