A 4-sided GRE by BDI is the ideal solution for projects that require 360 degrees of noise attenuation. BDI’s 4-sided GRE design incorporates large, vented front gates with sufficient open area to efficiently provide airflow into the facility. The side walls of our GRE facilities include large, acoustically-treated vents to provide engine entrainment air and to improve usability in cross-wind conditions. BDI’s run-up management system (RMS) adds information technology that greatly benefits users, owners, and stakeholders.