*SEFP Consistent Design* *1997 UBC vertical earthquake term* *Doc No: 10-00-CD-0002* *Date: May 30, 2013* *Article is ripped: Good one to share though*    For Strength Design, Ev has the effect of increasing compression and tension/uplift effects on vertical load carrying systems. Ev is not applicable for Allowable Stress Design. The new term, Ev, was introduced in the 1997 UBC. UBC Section 1630.1 defines Ev as the load effect resulting from the vertical component of the earthquake ground