I ELL Nick <br />Fro : Brent Lorscheider <lorsch2728@pacbell.net> <br />Seat: Monday, September 25, 2017 12:41 AM <br />To: GIOELLO Nick R <br />Cc: Faris Cassell <br />Subject: Road Load on Capital and Spring <br />Nick, <br />I have some follow up questions: <br />1. I found two documents that appear to cover this topic, the Administrative Order No. 58-11-11 and the Public <br />improvement Standards Manrial dated Oct 2007. Could yuou pls find out if these are the two documents that cover this <br />topic, of is it another document(s)? <br />2. 1 interpret the reading of the info below to mean that only 6 Class 5 trucks (GV4' R of 8 to 20 tons) were observed <br />(registered) during 2105...That seems like an extremely low number'?'?? <br />3. The statement "so the existin ACP thickness meet the 30 year design." factor in the ESAL's from the heavy° truck. <br />loads that will be generated during construction of the P !D, loads from Class 6, 7 and 8 trucks? <br />Thx, brent <br />Capital and Spring were rehabilitation projects as opposed to a reconstructed street, the difference being that we strive for <br />a 20 year design if we can get it, but we wouldn't reconstruct it if we can achieve a suitable outcome otherwise. A street <br />slated for reconstruct is designed for 30 years. <br />That being said, the existing structure of Capital was 7" to 8' of ACP on clay- with the top 2 inches delaminated. The <br />Class counts conducted in 2015 only registered 5.6 Class 5, equating to a 20 year design FSA_I.. of 13,917, and a 30 year of <br />22,)'7 <br />. Based on an R value of 5. the existing structural number was 2.94. The required SN is 2.0 for 20 year, and 2.2 <br />form year, so the existing ACP thickness meets a 30 year design. <br />The treatment for the street was a 2" to 4" cold plane pavement removal followed by 2" to 4" of ACP. <br />With 7" to 8" of ACP, the traffic count could more than double and the street would meet the design requirements. <br />Due to the lack of as-builts a number; of pavement cores were taken on Spring. The street structure was not very, <br />consistent - some of the cores indicated 3"-4" of ACP on degraded PCC, and other were 5--6" of .ACP on aggregate. The <br />20 year ESAL, is 24 7,488. Similar to Capital, the treatment was to remove the ACP to PCC and re-pave with 4" of <br />ACP. During construction, the street did not indicate any "soft" areas, so the re-paving is expected to perform well tender <br />the design loadings, and is probably sufficient to handle an increase volume of traffic. <br />