Twelve full-scale crash tests were performed to evaluate the performance of a thrie-beam
bridge-rail system. The railing consisted of 10-gauge thrie-beam steel rail attached to W6x9
steel posts spaced at 8 ft 4 in. Posts were attached to the deck by using base plates and
anchor bolts. The system was tested both with and without a 6-in. curb with the rail at a
height of 33 in.(measured from the deck) for both designs. Also tested were transitions from
W-beam guiderail on S3x5. 7 posts to thrie-beam guiderail on W6x9 posts and from the thrie …

Twelve full-scale crash tests were performed to evaluate the performance of a thrie-beam
bridge-rail system. The system was tested both with and without a 6-in. curb, with rail height
of 33 in.--measured from the deck--for both designs. Also tested were transitions from W-
beam guiderail on S3x5. 7 posts to thrie-beam guiderail on W6x9 posts, and from the thrie-
beam guiderail to the bridge rail. This railing can be used on either new or existing
structures, with or without curbs, and requires no attachment to existing railing or structural …