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Details

Masonry Cavity Wall - Base Detail

11/23/2013

 
Group B
Exterior Masonry Cavity Walls consist of a weather-resistant exterior wythe of brick or stone or similar material and an inner wythe of concrete block. The cavity aids in preventing water penetration by draining any water out the base of the wall. 
Masonry backup of concrete block offers the advantage of being a load bearing structure, although it can be non-load bearing. The cavity can accommodate significant insulation with masonry mass on the interior. 
The key features of the detail are the:
  • continuous cavity vent that prevents mortar droppings from clogging the bottom of the cavity
  • masonry flashing to direct any moisture to the exterior
  • weep vent to let moisture out of the cavity and to equalize air pressure in the cavity with the outdoors (a similar vent is often placed at the top of the cavity)
  • identifying other components of the wall

B2010-B - Masonry Cavity Wall

Picture
COMMENTS:
  • This detail is needed to specify the configuration, construction and materials required for the masonry cavity wall. 
  • This detail requires further details and specifications covering these conditions.
  • Building Codes have an impact on aspects of the work shown here.
  • You may want a specification covering the quality and installation aspects of these materials. The notes have specification reference numbers included to help make that connection.
  • These details should be placed on the Exterior Details sheet, the A501 or AE501 series of sheets per the National CAD Standards, contrary to the designation shown here.
  • Download PDF of detail.
  • See the Terms of Use for disclaimer.


orig post date FEB 2013

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