Section 1805
SECTION 1805. Impact. Frameless glass doors, glass in doors, fixed glass panels, and similar glazed openings which may be subject to accidental human impact shall conform with the requirements set forth by the Secretary on impact loads of glass: Except in the following cases: (1) Bathtub and shower enclosures shall be constructed from approved shatter-resistant materials, such as: wire reinforced glass not less than 5.6 millimeters thick; fully tempered glass not less than 4.8 millimeters thick: or laminated safety glass not less than 6.4 millimeters thick. (2) Glass lights located not less than 450 millimeters above the adjacent finished floor or walking surface. (3) Glass lights when the least dimension is not greater than 450 millimeters. (4) Glass lights 1.50 square meters or less in area.