Admin Order 58-16-01 - Laserfiche WebLink

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Weather Service Climate Summary for Eugene available at the following link: http://www.wrh.noaa.gov/pqr/climate/eug_clisummary.php. 12. Value is middle of range given on page 46 of 1998 Supplement for wet climate. Value is used to compute negative temperature differential for checking tensile stress in top of slab for axle loading near undoweled transverse joints. 13. Value from NOAA 29 -yr average for Eugene Airport. Value used in faulting predication models. 14. Value based on August normal maximum of 81.8 °F and January normal minimum of 35.2 °F. Value is used in the doweled joints faulting prediction model. 15. Value from National Weather Service Climate Summary for Eugene. Value is used in un - doweled joints faulting prediction model. The final step of the design is to estimate the magnitude of joint faulting at the end of the design period using the predicative models in 1998 Supplement for doweled or undoweled joints. Analyze joint faulting for a 30 year period. Adjustment to the design is required if the 30 year predicted faulting magnitude exceeds the critical values given in Table 28 of the 1998 Supplement. Potential adjustments include use of treated base material and use of subdrains to improve drainage conditions. The design life for PCC pavement shall be a minimum of 40 years for local streets, neighborhood collectors, and major collectors and a minimum of 50 years for arterials. The design shall assume the PCC carries the full traffic loading. If aggregate base or cement treated subgrade is used it shall be considered a working platform. Pavement design for streets shall factor in the Contractor's use of the pavement structure during construction. The pavement design shall consider the use of the subgrade and base by construction vehicles and equipment and include, as needed due to soil conditions or other factors, design and construction of an aggregate base working platform in order to avoid subgrade damage or failure. Prior to beginning the design analysis the designer shall consult with the City to identify the appropriate post -construction design vehicle or vehicles (e.g., City, utility company, emergency vehicles etc.). A narrative discussion of how the design vehicle(s) were accommodated in the design must be included in the analysis report. The minimum 28 day compressive strength for PCC shall be 4000 psi for all streets, accessways and alleys. No vehicles, including construction equipment, shall be permitted to use the pavement until it has reached its full design strength. If the designer intends for the street or alley pavement to be used prior to achieving its full design strength, the design report shall include verification that the structural design of the pavement will accommodate the proposed uses at the strength specified below without damage to the pavement. In the case of this design verification, the street or alley pavement may be used after it has achieved at least 70 percent of design strength. When design analysis yields a design thickness less than shown in the table below the following minimum Public Improvement Design Standards Manual, 2016 Page 2-36