Equipment Portfolio

Wall of Wind (WOW)

  • Open jet large wind tunnel
  • 12 electric fans in an arc-focal arrangement
  • Wind field cross-sectional area of 20ft (6.1m) W x 14ft (4.3m) H
  • Wind speed range of 10mph (16 km/hr) – 157mph (253 km/hr)
  • Open, Suburban, and Uniform exposures
  • 16ft (4.9m) diameter turn table
  • Turn table capacity of 105,000lb (47.6 tons) static / 52,000lb (23.6 tons) dynamic
  • Rotational speed range of 0.015-0.0014 min/deg

FIU Wall of Wind Building

FIU Wall of Wind


The NHERI WOW EF has instruments to quantify the wind field as well as the wind-induced effects on structures and components. Some of the most commonly used instruments are listed below.

Cobra probesWind speed and turbulence
Uni-axial load cellsForce
JR3 tri-axial load cells6-DOF forces and moments
Strain gaugesStrain
Pressure scannersDifferential pressure
AccelerometersTri-axial acceleration
String potentiometersDisplacement
Laser displacement sensorsDisplacement
Tri-axial inertial sensorsTri-axial accelerometer, magnetometer and gyroscope, temperature sensor, and pressure altimeter
Parsivel² laser disdrometersSize and speed of precipitation
Rain measurement gaugesWind-driven rain rate and rainwater deposition
Weather sensorsTemperature and humidity
Smoke generatorFlow visualization


The NHERI WOW EF has a system of high definition and surveillance cameras to monitor the tests and ensure the safety of the EF’s operation. The cameras consist of two Panasonic AW-HE60H pan-tilt-zoom (PTZ) cameras recording in Apple ProRes format and twelve Panasonic surveillance cameras capable of recording in compressed H.264 format. These cameras also allow for remote viewing (telepresence) of the tests.