There are no laterally unsupported unreinforced masonry parapets or cornices above the highest anchorage level with height/ thickness ratios greater than 1.5. Concrete parapets with height/thickness ratios greater than 1.5 have vertical reinforcement. Cornices, parapets, signs and other appendages that extend above the highest anchorage level or cantilever from exterior wall faces and other exterior wall ornamentation are reinforced and well anchored to the structural system.
For conforming buildings, the evaluator may consider this condition as mitigated, and no calculations are necessary. If any of these items are of insufficient strength and/or are not securely attached to the structural elements, they may break off and fall, becoming significant life-safety hazards. Check the adequacy of these items using the forces specified in Section 2.4.6. The maximum height of an unbraced URM parapet shall be determined based on the height dimension measured above the lower of either the level of tension anchors or roof sheathing to the top of the wall parapet. The minimum height of a parapet above the wall anchor should be 12 inches.
Exception: If a reinforced concrete beam is provided at the top of the wall, the minimum height above the wall anchor may be 6 inches.