00148947

Component

http://onlinepubs.trb.org...s/trr/1976/594/594-009.pdf

http://scholar.google.com...chie&publication_year=1976

A retrofit design is described here which is believed to be applicable to a large percentage of those concrete baluster installations that do not have curbs on walkways projecting beyond the face of the concrete railing. The design involves a new beam rail element, the Thrie beam fabricated by welding two Thrie (triple corrugated) beams. The beam is formed to and blocked out from the concrete baluster rail by 15.24-cm- diameter (6-in-diameter) collapsing rings spaced at 2.54 (8.33 ft); no attempt was made to space the rings to the concrete post. Further design features are detailed. Test results indicate that the tubular Thrie beam increases the strength of the bridge rail. Vehicle drainage was greatly reduced, and the single Thrie beam to Thrie beam provides a continuous effective guardrail to bridge rail transition.

Publication of this paper sponsored by Committee on Safety Appurtenances. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01411451

pp 32-35

1976

Transportation Research Record

030902563X

Digital/other

Figures (7) ; Photos; References (2) ; Tables (1)

Bridge railings; Concrete; Guardrail transition sections; Loss and damage; Retrofitting; Tubular structures; Vehicles

Bridges and other structures; Highways; Safety and Human Factors; Vehicles and Equipment

TRIS, TRB

Apr 13 1977 12:00AM

• CONCRETE SAFETY SHAPE RESEARCH (ABRIDGMENT)
• CRASH TEST AND EVALUATION OF A PRECAST CONCRETE MEDIAN BARRIER
• DESIGN PRACTICES FOR PAVED SHOULDERS
• DYNAMIC TESTS OF BREAKAWAY LIGHTING STANDARDS BY USING SMALL AUTOMOBILES (ABRIDGMENT)
• FULL-SCALE TESTS OF A MODIFIED COLLAPSING-RING BRIDGE RAIL SYSTEM (ABRIDGMENT)
• IMPACT DESIGN OF CRASH CUSHIONS FOR NONSTATIONARY BARRIERS (ABRIDGMENT)
• IMPACT PERFORMANCE OF THE MINNESOTA 1.5 RADIUS PLATE BEAM GUARDRAIL (ABRIDGMENT)
• LABORATORY ACCEPTANCE TESTING OF BREAKAWAY SUPPORTS FOR SIGNS AND LUMINAIRES (ABRIDGMENT)
• OBLIQUE AIRPHOTOS FOR MAPPING, EDUCATING USERS, AND ENHANCING PUBLIC PARTICIPATION IN ENVIRONMENTAL PLANNING
• REMOTE SENSING OF ATMOSPHERIC POLLUTANTS TO ASSESS ENVIRONMENTAL IMPACT OF HIGHWAY PROJECTS (ABRIDGMENT)
• SEDIMENT TRAPPING EFFICIENCY OF STRAW AND HAY BALE BARRIERS AND GABIONS
• SIMPLIFIED ANALYSIS OF CHANGE IN VEHICLE MOMENTUM DURING IMPACT WITH A BREAKAWAY SUPPORT
• STATE-OF-THE-ART REVIEW OF PAVED SHOULDERS