Plantscapes Office Building - Seattle, WA
SECOND FLOOR ADDITION
We performed the engineering and architectural design for the addition of a second floor office space over the top of the existing single story office area. We analyzed the strength of the existing single story concrete structure to support the weight of the addition. We found that the existing precast concrete roof structure was not sufficient to support the new floor so we designed a new wood floor system over the top of the existing roof. We did find however, that the existing concrete walls were sufficient to support the code-required lateral and gravity loads and no significant strengthening measures were necessary.