Primary Infrastructure

  • 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


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 probes Wind speed and turbulence
Uni-axial load cells Force
JR3 tri-axial load cells 6-DOF forces and moments
Strain gauges Strain
Pressure scanners Differential pressure
Accelerometers Tri-axial acceleration
String potentiometers Displacement
LVDT Displacement
Laser displacement sensors Displacement
Inclinometers Rotation
Tri-axial inertial sensors Tri-axial accelerometer, magnetometer and gyroscope, temperature sensor, and pressure altimeter
Parsivel┬▓ laser disdrometers Size and speed of precipitation
Rain measurement gauges Wind-driven rain rate and rainwater deposition
Weather sensors Temperature and humidity
Smoke generator Flow visualization
Volumetric Particle Imaging Velocimetry (PIV) Flow visualization, velocity and velocity gradients measurements


The NHERI WOW EF has a system of 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.

Access the live video streaming.