Blast Deflector

Design and build based on site specific engineering parameters such as aircraft thrust, engine height, wind force, elevations, soil conditions and client needs. Developed to address airport noise. Designed to conform to all FAA and airport standards. Creates more usable space and minimizes the possibility of damage from jet blast hazards.

Introduction:

Empire Acoustical System (EAS) has been engineering, manufacturing, and installing airport blast barrier since 1989, the project for Grissom Air force Base in Indiana. And our latest project completed was the Hobby Airport in Houston.

EAS has been monitoring airport noise problems and working closely with airport authorities in addressing the acoustical needs of airport facilities, and the related surrounding community.

EAS has developed a series of products that specifically address airport hazard issues and noise problems. Two types of airport blast deflectors are available from EAS: Blast Deflector and Dual Application Blast Deviation and Blast Absorption Deflectors. EAS blast deflectors create more usable space and minimize the possibility of damage from jet blast hazards. The blast barriers are designed to conform to all FAA and airport standards as required by our clients. The blast deflectors are available in height from 8 to 20 feet, for most aircraft.

The Santa Monica Airport (SMO)
Grissom Air Force Base (GUS)
Salt Lake City (SLC)
Lahm Airport (ANG)
Kirkland Air Force Base (ABQ)
Columbus International Airpoort (CMH)
Los Angel Airport (LAX)
Midway Airport (MID)

Installation:

Installation in New Concrete:

Anchor bolts will be “L” type for setting in newly placed concrete, with a fixed squire nut run tight on   threads to locate the grade line. The assembly must be galvanized. Anchor bolts will be galvanized and tightened to manufacturer’s prescribed torque, against an external spline lock washer at final assembly.

Tolerances between anchor bolts centers must be non-cumulative and must be accurately held in order to prevent assembly difficulties.

Installation in Existing Concrete:

An epoxy grout type fastener such as HILTI type HAS adhesive anchors, conforming to recommendations of the blast barrier manufacturer must be used.

Test on Blast Deflectors:

The test was performed with a four turbo fan engine KC-135R stratotanker, and  all four engine was operated up to 80% N1. The presssure temperatures, tu movement, strain/stress and vibration data were collected.

The 130 2″ barrier was installed, and 85 feed 4″ away from the exhaust nozzle. The strain/stress test showed a result that the lowes yield margin of safety based on a yield stress of 36,000 psi was 240 percent, which over the stress from  80% N1 load.    The highest surface temperature measured by thermocouple data logger on the barrier was 90 Fo. The viration test showed that the largest desplacements plotted on the spectrums occurred at between 80 and 200 CMP which was at 80% N1 condition.