Detailing masonry parapets

By Walter LaskaS t a ff Arc h i t e cM a s o n ry Advisory CouncilPark Ridge, IllinoisAparapet wall is the portion of awall that extends above theroof. Its purpose might be aes-thetic, hiding mechanical equipmentand providing a distinct roof line. Orit can be functional, helping to preventflames from spreading from rooftop torooftop. Codes often require parapetsfor this parapet walls have two ex-posed surfaces, they can suffer seriousproblems. Both sides of the wall aresubjected to temperature swings andrain. In northern regions, snow driftsup against the walls, further increasingthe possibility of moisture conditions are more severe thanthose that building walls in moderateclimates are subjected to.

Building Code Requirements for Ma-sonry (see reference) does not allow the height of a parapet wall to exceed three times its nominal thickness. If the height exceeds this limit, then more lateral support is needed. Ve r t i - cal rebars and grout placed within the wall at appropriate intervals can pro-vide lateral support. Piers and pilasters

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  Masonry, Detailing, Parapets, Normas y, Ryson, Detailing masonry parapets

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