Texas Health and Safety Code - HEALTH & SAFETY § 791.035. Fire Escape Requirement

(a) A school building of at least three stories and of fireproof construction, semifireproof construction, or ordinary construction shall have one fire escape for each group of 250 pupils, or each major fraction of that number, who are housed in the building at a level above the first floor.

(b) A school building of two stories and of ordinary construction shall have one fire escape for each group of 250 pupils, or each major fraction of that number, who are housed in the building at a level above the first floor.

(c) A school building of two stories that is of fireproof or semifireproof construction or that has stairways and hallways of that type of construction is not required to have a fire escape.