Solar checklists for Florida building, fire, and safety codes


Florida-based Castillo Engineering Services, a solar and energy storage design firm, recently launched Solar Done Right, which it said is intended to advance the quality and safety of solar designs and installations by providing checklists and other educational resources.

The checklists, downloadable for free, provide guides to help ensure that projects comply with the newly updated Florida Building Code, National Electric Code, and National Fire Code.

“Checklists are a key element of high-reliability and high-performance engineering,” said Christopher Castillo, CEO of Castillo Engineering. The Solar Done Right Checklist is intended to help keep local building departments, solar installers, and homeowners current on the latest structural, electrical, and fire safety solar codes; as well as reduce plan examiners’ review times and permit rejections.

Rejected solar plans

The company cited five primary reasons why solar plans are rejected in Florida.

  1. Missing PE Stamp: Florida now requires a professional engineer stamp, or an FSEC certification.
  2. Plans not site-specific: Florida Building Code (FBC) requires site-specific measurements of wind speed, exposure category, and risk category. Module pressures and attachment spans must be included as well, and none of these measurements may be generically assumed.
  3. Incorrect wind zones: FBC 2020 set new wind zones, increasing the number from three to seven distinct zones, and reworked roof zones on flat roof planes. Pressures per roof zone also increased with respect to wind speed.
  4. Missing module exposure identification: The recent code change differentiates the pressures experienced by the PV module based on its location in the array. Modules are now separated into edge, exposed, and non-exposed classifications.
  5. Incorrect attachment spans and loading: The spans between attachments are determined by the loading on the attachments. That loading should not exceed the maximum allowable strength of the attachments. The effect is to limit the span of the rails between the attachments.

In addition to the checklists, Castillo Engineering will offer a series of Continuing Education Courses hosted by the Building Officials Association of Florida.

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