Aesthetic Concrete Barrier Design (2006) / Chapter Skim
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Appendix - Guidelines for Aesthetic Barrier Design
Appendix - Guidelines for Aesthetic Barrier Design
Pages 72-77
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From page 72... ...
Examples of Using the Aesthetic Design Guidelines for Safety Shape Barriers Two sample design exercises are presented to demonstrate the use of the aesthetic design guidelines in applying aesthetic surface treatments to concrete safety shape barriers. Example 1 An aesthetic surface treatment shown in Figure A-5 is evaluated and modified using the aesthetic design guidelines in this example.
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From page 73... ...
The first type of asperity is 350 mm wide and 25 mm deep and has 45-degree asperity edges. The second type of asperity is 100 mm wide and 25 mm deep and has 90-degree asperity edges.
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From page 74... ...
If a width of 30 mm for the 90-degree asperities appears too small, the designer may consider changing the asperity angle to 45 degrees and increasing the asperity width. As an example, Figure A-9 shows one such modification in which the original 90-degree asperities have been replaced by the 45-degree asperities that are 200 mm wide and 7 mm deep.
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From page 75... ...
• Images or geometric patterns cut into the face of the barrier 25 mm or less and having 45-degree or flatter chamfered or beveled edges to minimize vehicular sheet metal or wheel snagging. • Textures or patterns of any shape and length inset into the face of the barrier up to 13 mm deep and 25 mm wide.
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From page 76... ...
• Any pattern or texture with a maximum relief of 64 mm, if such a pattern begins 610 mm or more above the base of the barrier and if all leading edges are rounded or sloped to minimize any vehicle snagging potential. (No part of this pattern or texture should protrude below the plane of the lower, untextured portion of the barrier.)
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From page 77... ...
D., NCHRP Report 350: Recommended Procedures for the Safety Performance Evaluation of Highway Features, Transportation A-6 Research Board, National Research Council, Washington, D.C., 1993.
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