NORTH CAROLINA · NEW HANOVER COUNTY
Where the Cape Fear meets the Atlantic, the wind writes the code
Wilmington sits at North Carolina's hurricane front door — a Cape Fear River port wedged between barrier-island surf and tidal estuary. Here is how design wind speed, exposure, and the NC building code shape every permit set.
WIND & EXPOSURE · PORT-CITY GEOGRAPHY
One county, three very different wind worlds
From the open Atlantic at Wrightsville Beach to the wooded subdivisions off Market Street, the right speed and exposure shift block by block.
Oceanfront barrier islands
Wrightsville, Carolina & Kure Beach take the full fetch — the upper 135–140 mph band and open-water Exposure D / C.
EXPOSURE D / CRiverfront & the working port
The Cape Fear estuary and Port of Wilmington create mixed fetch — exposure must be justified reach by reach, not assumed.
EXPOSURE C, SITE-VERIFIEDWooded inland Wilmington
Suburban tree canopy off Market and College may earn Exposure B at the lower 130–135 mph end with proper terrain study.
EXPOSURE B POSSIBLESpeed is site-specific. Wilmington's 130–140 mph range is read from the ASCE 7-22 maps for the New Hanover coast — the exact figure varies by site. Never assume a single mph; pull it for your precise address.
STORM RECORD · WHY THE NUMBERS RUN HIGH
Florence parked over the Cape Fear — the coast remembers
Two landmark storms set the bar for how seriously this stretch of coast takes wind design.
Hurricane Florence, 2018
Landfall near Wrightsville Beach; its slow crawl drowned the region in record rainfall. Proof that wind design and flood resilience travel together here.
CAPE FEAR LANDFALLHurricane Hazel, 1954
A Category 4 strike near the NC/SC line that flattened the beaches and battered Wilmington — the historic benchmark behind today's code minimums.
CAT 4 BENCHMARKPERMIT CHECKLIST · NEW HANOVER COUNTY
What a Wilmington permit set actually has to carry
Six things New Hanover County Building Safety expects in a sealed wind-load package.
Address-derived speed
The 130–140 mph value pulled from ASCE 7-22 maps for your exact New Hanover site.
3-SEC GUSTJustified exposure
C for coastal/riverfront, B inland with terrain study, D on the open beach — documented, not assumed.
B / C / DRisk Category call
Per ASCE 7-22 Table 1.5-1 — the higher the category, the longer-return-period map you read.
CAT I–IVFull ASCE 7-22 method
Velocity pressure qz = 0.00256 Kz Kzt Kd Ke V², with MWFRS and C&C worked through.
MWFRS + C&CNC PE / RA seal
Calculations sealed by an engineer or architect licensed in North Carolina for permit submission.
LICENSED IN NCV-Zone flag
Coastal High Hazard (V-Zone) reaches of New Hanover County add design rules beyond wind alone.
COASTAL HIGH HAZARDKEEP EXPLORING · NORTH CAROLINA & OFFICIAL SOURCES
From the Cape Fear coast to the statewide picture
Statewide context, the standards behind the math, and the official New Hanover & NC code authorities.
North Carolina requirements
How the NC State Building Code and ASCE 7-22 play out statewide.
STATE GUIDEAll state requirements
Compare adopted codes and wind maps across every U.S. state.
50-STATE INDEXASCE 7 standards
The wind-load provisions every Wilmington calculation is built on.
STANDARDSNew Hanover Building Safety
County permit authority for Wilmington-area projects.
OFFICIALNC State Fire Marshal
Engineering & codes division of the NC Dept. of Insurance.
OFFICIALNC State Building Code
The adopted code text governing Wilmington permits.
OFFICIALMore on the standards and free downloads in our resource library and articles & guides.
CAPE FEAR-READY CALCULATIONS
Skip the map-reading — get a Wilmington-correct load set
Enter any New Hanover County address. The calculator pulls the 130–140 mph site speed, flags coastal versus inland exposure, applies your Risk Category, and returns a PE-ready ASCE 7-22 report.