Interactive Resources, Inc. was retained by SolarCity (merged with TESLA) to provide structural engineering services and review the roof framing at the existing SpaceX facilities located in Hawthorne, California.

Structural engineering services were provided to evaluate the existing framing, including the review of the existing “as-built” plans; the preparation of structural calculations to check framing to support vertical array loads including ballast; to check if the array plus ballast is below maximum allowable load increase of 10% mass at the roof level; and to provide supplemental stamped and signed sets of calculations and the array layout drawings.