Each solar module weighs approximately 54 lbs, evenly distributing the weight, we keep the weight per sf to 5 lbs. If you have your as-builts we can take a look at the live load listed on the specifications and tell you pretty easily if it can hold the weight. With newer buildings this is much less of an issue, but our team’s due diligence ensures the system fits the building. After we have a signed contract we conduct engineering and create a full set of plans that include structural load calculations to ensure the building can support the commercial solar system.