Proposed Practice for Alternative Bidding of Highway Drainage Systems (2015) / Chapter Skim
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Pages 36-40
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From page 36... ...
36 Summary of Gaps in Knowledge and Practice This chapter summarizes noted gaps in the current state of practice related to the design and subsequent bidding of gravity drainage pipes for roadway applications. NCHRP Project 10-86 was tasked with identifying gaps that had the potential to substantially affect the development and implementation of the Recommended Practice.
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From page 37... ...
37 and the methodologies presented in reference documents (e.g., AASHTO LRFD Bridge Specifications; Chapter 12) are accepted as appropriate.
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From page 38... ...
38 4.1.4 Pipe Joints The responsibility to provide information regarding the impact of pipe joint systems typically falls on the manufacturer. While some pipe systems and products provide a full range of information to allow the adequate incorporation of joint performance into design, this is not universal amongst available pipe products and joint systems.
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From page 39... ...
39 (as summarized in Figures 2 through 8) that vary over a wide range of risk tolerances and do not typically consider the expected length of service.
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From page 40... ...
40 American DOTs completed during NCHRP Synthesis 474: Service Life of Culverts (an update to NCHRP Synthesis 254 that will be published in spring 2015) indicated the following state of practice trends show an apparent implementation gap in applying site specific durability evaluations.
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