Why does Florida need its own wind load calculator at all?
Because Florida is the only state running a single statewide building code with hurricane wind written into its DNA.
After Hurricane Andrew flattened a swath of Miami-Dade in 1992, the state scrapped its patchwork of local codes and enacted the Florida Building Code in 2002 — the nation's first unified statewide code.
A national tool treats Florida as one more state on the ASCE 7-22 map. Florida treats wind as the headline.
That gap — between a map value and the value a Florida plan reviewer will actually accept — is the whole reason this calculator exists.
What is FBC 8th Edition, and what does it pin for wind?
FBC 8th Edition is the 2023 cycle of the Florida Building Code, enforceable December 31, 2024. It adopts ASCE 7-22 as the wind load standard, replacing the ASCE 7-16 basis that lived under FBC 7th Edition.
The pairing carries four changes that move a real Florida pressure number:
- Refreshed coastal wind-speed contours
- A fourth enclosure class (Partially Open, GCpi of ±0.18) that catches most lanais and pool cages
- A reorganized Chapter 30 C&C procedure by roof shape
- The Florida-only 4-foot edge strip minimum under FBC R301.2(7)
Does the calculator cover the whole state, or just the coast?
All 67 counties, coast to interior. The statewide map runs from roughly 180 mph in the Keys down through 130 mph in the inland Panhandle and northeast Florida.
The calculator resolves your county the instant your fifth ZIP digit lands, pulls the ASCE 7-22 baseline for that point, and layers any local override on top automatically.
That means Miami-Dade 175 mph, Broward 170 mph, Collier 170 mph, Monroe ~180 mph. Inland counties that follow the raw ASCE baseline are handled the same way; you never choose.
What is HVHZ, and which counties does it cover?
The High Velocity Hurricane Zone is the strictest overlay inside the Florida Building Code, and it covers exactly two counties: Miami-Dade and Broward.
It was written in direct response to Hurricane Andrew (1992), after forensic teams found the pre-Andrew code too weak for that density of exposed population.
Inside HVHZ the design speeds bump (175 mph Miami-Dade, 170 mph Broward). Every opening generally needs a Miami-Dade Notice of Acceptance on top of statewide Florida Product Approval, and products must clear TAS 201, 202, and 203 testing.
The calculator stamps HVHZ on any Miami-Dade or Broward ZIP automatically.
What are TAS 201, 202, and 203?
They are the three Test Application Standards an HVHZ-rated assembly must pass:
- TAS 201 is Large Missile Impact — the 2×4 cannon-shot test
- TAS 202 is Uniform Static Air Pressure
- TAS 203 is Cyclic Wind Pressure
An assembly that clears all three earns a Miami-Dade NOA and qualifies for use in the HVHZ.
That testing regime is why a Miami-Dade-rated impact window costs meaningfully more than a comparable rest-of-state unit.
Which Florida counties carry a wind speed above the ASCE map?
Four: Miami-Dade (175 mph), Broward (170 mph), Collier (170 mph), and effectively Monroe / the Keys (~180 mph). Palm Beach runs 165–170 mph and sits just at the edge.
Each override traces to a specific post-storm forensic record — Andrew (1992) for Miami-Dade and Broward, Ian (2022) for Collier's tightening.
Drop a ZIP from one of these counties into a generic national tool that does not know the override and you will undersize the project.
Each has its own deep-dive county page; this hub links them all.
Can I get a Florida P.E. sign-and-seal through this service?
Yes, for Florida projects up to three stories. Our in-house engineer is Florida-licensed and routinely seals wind load reports for window and door replacements, shutter packages, lanais, screen enclosures, and similar residential and small-commercial scopes.
Out-of-state PE work is not offered through this service — if your project is in another state we can still run the calculation, but the seal needs a P.E. licensed there.
Note that the software output itself is an Engineering Report; the seal is the separate stamp step.
How long has this calculator been around?
The firm was founded in 2002 — the same year the Florida Building Code took effect — and the online calculator went live in 2006, among the very first on the web.
Across 24 years it has navigated seven ASCE 7 editions (7-95 through 7-22) and every Florida code cycle through FBC 8th Edition, maintaining a 100% permit-approval record.
Backed by an in-house Florida P.E. and a 50-state PE network for sealing beyond Florida.