Testing and Evaluation of a Pedestal Base Sign Support (0-1792-3)

The purpose of this series of tests is to verify the performance of the pedestal base sign installation when attached to the ground with a helical type screw-in foundation anchor assembly.|A square base pedestal sign installation attached to the ground with a helical type screw-in foundation anchor assembly successfully met the evaluation criteria set forth in National Cooperative Highway Research Program (NCHRP Report 350). The installation was fabricated using a Pelco (model SP 1014 TX) square cast aluminum traffic signal base with a 114 nun (4.5 in) O.D.x 3.96 m (13 ft) long spun aluminum pole. Attached to the pole was a 16 mm x 1.2 m x 1.2 m (0.625 inch x 48 inch x 48 inch) plywood warning sign with the bottom of the sign height 2.26 m (7.4 ft). In addition, a 305 mm (12.0 inch), LED lamp, flashing yellow signal beacon was mounted directly above and below the sign panel. The helical type screw-in foundation anchor assembly (model PB5306) was placed in NCHRP Report 350 standard soil.|Under this project, the safety performance of selected work zone traffic control devices were evaluated through full-scale crash testing in accordance with NCHRP Report 350 guidelines. The pedestal base sign support installation installed atop a screw-in helical type ground anchor was found to be in compliance with NCHRP Report 350 guidelines and is considered suitable for implementation. Installations that deviate in construction significantly from the details presented herein may require additional engineering evaluation and/or testing.