Wyo. Stat. § 35-9-504
All such metallic, iron or fireproof ladders or stair fire escapes, stairways, hallways or means of egress, mentioned or described in this act, shall at all times be kept free from any obstruction, in good repair and ready for use; and at night, or where lights are necessary in the daytime, a red light shall be provided with the words inscribed thereon "FIRE ESCAPE". Provided, that on all hotel, theater, school and hospital buildings, two (2) or more stories in height, said stairways shall extend from each floor of said building to the ground and shall not be less than three (3) feet wide; the risers of said stairs shall not be greater than eight (8) inches, and the treads not less than ten (10) inches wide; and the platform not less than three (3) feet wide, and in all cases the full width of the stairs. All such stairs shall have proper guard rails not less than twenty-eight (28) inches high. Where tubing is used for guard rails they shall be not more than ten (10) inches apart; and where balusters are used they shall be not more than six (6) inches apart.
W.S. 35-9-504