Common methods include adding support beams, reinforcing existing joists, or installing additional columns. Typical Retrofit Options. This case study focuses on the design of a ground mounted PV solar panel foundation using the engineering software program spMats. The selected solar panel is known as Top-of-Pole Mount (TPM), where it is deigned to install quickly and provide a secure mounting structure for PV modules on a single. . Structural retrofits for solar panel installation are often needed to prevent excessive deflection, roof failure, or code violations. By understanding how reinforced roofs work—and why they're necessary—you can avoid costly surprises and ensure your solar project proceeds smoothly. This article delves into the top five truss modification techniques—sistering, strapping, tie-downs, blocking, and tensioning systems—that are commonly employed when existing. . Rooftop solar panel installation requires three critical structural engineering steps: (1) assessing current roof load capacity through professional evaluation of framing elements, (2) selecting appropriate mounting systems (ballasted, fully attached, or hybrid) based on capacity findings, and (3). . Planning out the layouts, designs, capacities, and options for solar panels is like putting together a puzzle. This step is dependent on the outcome of the assessment of the roof framing capacity, as each solar system has a different weight.