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Brace Long Walls With Crosswalls 

Long wall sections bend more than shorter walls, making them more vulnerable to earthquake damage. Crosswalls can be added to act as dampers, absorbing energy and limiting displacements from ground motion. Unlike shear walls, crosswalls are designed to tie two diaphragms together, and thus partitions that are not necessarily lined up above one another can qualify as crosswalls.

Effectiveness:

  • Somewhat to very effective, depending on pre-disaster building condition. 

Limitations:

  • Crosswalls should be tied to the roof framing as well as the floor system to reduce the risk of parapet failure and damage to the upper walls.
  • Crosswalls should be anchored with the sill plate and bolted to a new, reinforced concrete footing. 

 

 

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Randolph Langenbach

M-Arch (Harvard), Dipl.Conservation (York, England)


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