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COVID-19 Risk Level for Multnomah County: High Risk

Structural Advisory Committee Meeting July 31, 2018

Public Meeting

Available Online

Room: BDS Conf Room 6(g) 2:00 PM – 3:00 PM

Agenda

  1. Introductions
  2. Discuss possible recommendations for standards required for placarding of URM Buildings

Criteria under which building placards would not be required

  1. Buildings have previously been retrofitted to Life Safety performance objective or better using FEMA-178, FEMA 310, ASCE 31, Life Safety performance level under BSE-1 and Collapse Prevention performance level under BSE-2 as defined in ASCE 41 or Oregon Structural Specialty Code, 1993 edition or later OR

  2. An Engineer registered in Oregon can provide documentation showing that the structure meets or has been retrofitted to meet Life Safety performance level under BSE-1 and Collapse Prevention performance level under BSE-2 as defined in ASCE 41 OR

  3. Documentation is provided which shows that the structure meets or has been retrofitted to meet all the following as a minimum:

    1. Parapets, Chimneys, Cornices and other exterior architectural ornamentations are braced for out of plane loading

    2. Exterior walls are attached to all floors and roof levels

    3. The building has at-least a minimum of two lines of vertical elements of the lateral force

      resisting system parallel to each axis. Masonry walls shall have piers with a height to width ratio that does not exceed 2:1. Wall piers shall occupy not less than 40 percent of the wall’s length for the wall to be considered as providing a line of resistance Exception: If a design professional registered in Oregon can demonstrate that the flexural, shear and compressive strength Demand/Capacity ratio are equal to 2.0 or less for all walls when evaluated using ASCE 41

    4. Exterior walls meet or exceed the following height to thickness ratios unless they have been retrofitted for out-of-plane loading

height to thickness ratios
Wall typesHeight to Thickness ratios
Walls of one-story buildings13
First-story wall of multistory building15
Walls in top story of multistory building9
All other walls13

There are no minutes available for this meeting.