United States Department of Transportation
i
MASH TL-4 Engineering Analyses and Detailing of 36-Inch and 42-Inch High Median Barriers for LADOTD [Tech Summary]
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2023-07-01
[PDF-211.73 KB]
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Abstract:The objective of this research was to analyze the strengths of the four proposed retrofit designs considered for this project in accordance with AASHTO Load and Resistance Factor Design (LRFD) Bridge Design Specifications Section 13 for MASH TL-4 impact conditions. These designs are briefly described below and shown in Figure 1 (36-in. median barrier): 1. A 36-in. single-slope median barrier without the longitudinal open joint (as shown in Figure 1 except no longitudinal open joint). 2. A 36-in. single-slope median barrier with the longitudinal open joint (as shown in Figure 1). 3. A 42-in. single-slope median barrier without the longitudinal open joint (same as Figure 1 except 42 in. tall and 7 5/8 in. wide at top). 4. A 42-in. single-slope median barrier with the longitudinal open joint (same as Figure 1 except 42 in. tall and 7 5/8 in. wide at top). 5. Recommendations and improvements were made as necessary based on the analyses performed for this project to enhance the strength and performance of the barrier designs for MASH TL-4 impact conditions.
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