Parapet corrective work must be performed in conjunction with the installation of tension roof anchors.
Roof parapet height code.
Parapets are a combination of wall and roof pressures.
2015 ibc code commentary.
In order for a roof parapet to provide adequate fall protection a roof parapet railing should be at least 42 in height.
However when a roof slopes down toward an exterior wall and parapet with a slope greater than 2 12 further analysis is required to determine if a taller parapet is necessary.
The minimum height of a parapet wall above the roof surface is 30 inches.
The minimum height of a parapet above any wall anchor shall be 12 inches 305 mm.
1 every building constructed 3 stories or 36 feet or more in height shall have roof tie backs or other permanent devices installed at the roof level for the purpose of securing or tying back suspended scaffold hooks or clamps and safety lines.
Unfortunately many buildings get close to this height without quite meeting the height required by osha to provide fall protection.