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4 <br /> STABBEr" T <br /> E NJ G I NJ E E R I NJ G <br /> The following calculations address the installation of two roof top mechanical units. There is <br /> an ERV box and Control box located beneath the second-floor framing that operates with each <br /> rooftop unit. The existing structural and architectural plans for the building were provided for <br /> our use. We found that the existing structure can support the units. We are showing wood <br /> sleepers at the rooftop unit to distribute the load to the structure. <br /> 3040 78TH AVE SE#501 •MERCER ISLAND,WA 98040•425.968.5432 <br />