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14 story concrete shear wall building retrofit -- 1997 Uniform Co de for the Abatement of Dangerous Buildings' (UCADB) Section 302.14

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The Municipality of Anchorage has historically interpreted the '1997 Uniform
Code for the Abatement of Dangerous Buildings' (UCADB), Section 302.14
paragraph 14, to mean that the lateral force resisting system needs to have
66 % of the strength required by the current building code or it is been
deemed dangerous and abatable, in addition to the requirements in paragraphs
4 and 7.   Two 14 story concrete shearwall sister buildings were built in
Anchorage in 1951 + -.  They barely made it through the 1964 Alaska
earthquake and most earthquake textbooks show pictures of thier cracked
spandrel beams,shearwalls and foundation.  One of the sister buildings,
'McKay Building', has consequently been upgraded with boundary elements,
strengthened spandrel beams, strengthened grade beams and post-tensioned
overturning anchorage. 
The sister building was repaired originally after the earthquake.  A
'Warning Letter of Abatable Nuisance', a portion of which calls for
structural strengthening of the building's lateral force resisting system,
was sent to the owner in December 2000.  The owner is appealing the seismic
strengthing section of the Warning Letter of Abatable Nuisance.

How have other jurisdictions handled similar situations?

How have other jurisdictions interpreted '1997 Uniform Code for the
Abatement of Dangerous Buildings' (UCADB) Section 302.14?


Scott M Haan P.E.
Plan Review Engineer
Building Safety Division 
Development Services Department
Municipality of Anchorage

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