Equipment Details
Product Name: Safety Splice Breakaway Sign Support
Description:
The 356-mm square by 6.3-mm thick soil plates are bolted on the stubs and are an integral part of the breakaway support design for use in weak soils. The full-scale crash testing of the spliced triple-post, 5.9-kg/m, 414-Mpa (60-ksi) steel sign support is summarized in the table below. The three 915-mm long support stubs were driven into the strong (S-1) soil leaving 102 mm of the stubs exposed. In the weak (S-2) soil test the stubs were 1525 mm long with 102 mm if each stub exposed. The tops of the soil plates were set 153 mm below the ground line. The stubs were spaced 457 mm on center. The top elements of the sign supports overlaps the stubs by approximately 150 mm, and were connected to the stubs by two 5/16-inch x 2-inch (8-mm x 51 mm) HS Grade 9 steel bolts. With each bolt there were a Grade 9 cut washer, two spacers, a retaining washer, and a self-locking flange nut. The splice bolts were spaced 102 mm on center. The 25.4-mm square, 9.5-mm thick spacers are each punches with an 11-mm hole. Two spacers are placed back to back at each splice bolt location between nested u-channels. The spacer bar can also be 3/8-inch (9.5 mm) thick.
NCHRP Approval: NCHRP Approved
Approval Letter Link: http://safety.fhwa.dot.gov/roadway_dept/road_hardware/breakaway/pdf/ss59.pdf
Contact(s):
Chicago Heights Steel
211 E. Main
P.O. Box 129
Chicago Heights, Illinois 60411
Contact: Mr. Mark Granger
Phone: (708) 756-5648
Fax: (708) 756-5628
Website: http://www.chicagoheightssteel.com/
