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Chapter 620 Design of Pavement Structure-cy to sy converter

Chapter 620 Design of Pavement Structure
620.01 General Exhibit 620-5 Estimating: Base and Surfacing Quantities
620.02 Estimating Tables Exhibit 620-6 Estimating: Base and Surfacing Quantities
Exhibit 620-7 Estimating: Base and Surfacing Quantities
Exhibit 620-1 Estimating: Miscellaneous Tables Exhibit 620-8 Estimating: Base and Surfacing Quantities
Exhibit 620-2 Estimating: Hot Mix Asphalt Pavement and Asphalt Distribution Exhibit 620-9 Estimating: Base and Surfacing Quantities
Tables Exhibit 620-10 Estimating: Base and Surfacing Quantities
Exhibit 620-3 Estimating: Bituminous Surface Treatment Exhibit 620-11 Estimating: Base and Surfacing Quantities
Exhibit 620-4 Estimating: Base and Surfacing Typical Section Formulae and Exhibit 620-12 Estimating: Base and Surfacing Quantities
Example
620.01 General
Detailed criteria and methods that govern pavement design are in the Washington State Department of
Transportation (WSDOT) Pavement Policy, which is available from the Pavements website:
https://wsdot.wa.gov/engineering-standards/construction-materials/pavement-design-management
The pavement design for all Design-Build project Request for Proposals (RFPs) will be conducted by the State
Materials Lab, Pavement Division.
620.02 Estimating Tables
The tables in Exhibit 620-1 through *Tabulated quantities are based on compacted weight of 1.85 tons/yd3
Exhibit 620-12 are for developing estimates of quantities for pavement sections, shoulder sections, stockpiles,
asphalt distribution, and fog seal.
WSDOT Design Manual M 22-01.21 Page 620-1
September 2022
Chapter 620 Design of Pavement Structure
Exhibit 620-1 Estimating: Miscellaneous Tables
Unit Dry Weight - Gravel Base and Surfacing
Truck Measure Compacted on Roadway
Type of Material lb/cy T/cy lb/cy T/cy
Ballast 3,100 1.55 3,900 1.95
Crushed Surfacing Top Course 2,850 1.43 3,700 1.85
Crushed Surfacing Base Course 2,950 1.48 3,700 1.85
Screened Gravel Surfacing 3,700 1.85
*Gravel Base 3,400 - 1.70 -
3,800 1.90
Permeable Ballast 2,800 1.40
*3,700 lb/cy (1.85 tons/cy) is recommended as the most suitable factor; however, if the grading approaches the
coarseness of ballast, the factor would approach 3,800 lb/cy (1.90 tons/cy), and if the grading contains more
than 45% sand, the factor would decrease, approaching 3,400 lb/cy (1.70 tons/cy) for material that is essentially
all sand.
Notes:
? Weights shown are dry weights and corrections are required for water contents.
? The tabulated weights for the materials are reasonably close; however, apply corrections in the
following order:
? For specific gravity: Wt. = tabular wt. x specific gravity on surface report/2.65
? For water content: Wt. = tabular wt. x (1 + free water % in decimals)
? If material is to be stockpiled, increase required quantities by 10% to allow for waste.
? Consider the inclusion of crushed surfacing top course material for keystone when estimating quantities
for projects having ballast course.
WSDOT Design Manual M 22-01.21 Page 620-2
September 2022
Chapter 620 Design of Pavement Structure
Exhibit 620-2 Estimating: Hot Mix Asphalt Pavement and Asphalt Distribution Tables
Fog Seal
Asphalt
Application Type of Emulsified Application gal* per Tons* per sy Tons/Mile Width (ft)
Asphalt sy 10 11 12
Fog Seal CSS-1/CSS-1h 0.07 0.000292 1.7 1.9 2.1
*Quantities shown are retained (residual) asphalt.
Specific Data[1][2]
Hot Mix Asphalt Paving Quantities (tons/mile)*
Width Depth of Pavement (ft)
(ft) 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75
4 161 241 321 402 482 563 643 723 804 884 964 1045 1125 1206
6 241 362 482 603 723 844 964 1085 1206 1326 1447 1567 1688 1808
8 321 482 643 804 964 1125 1286 1447 1607 1768 1929 2090 2250 2411
10 402 603 804 1005 1206 1407 1607 1808 2009 2210 2411 2612 2813 3014
11 442 663 884 1105 1326 1547 1768 1989 2210 2431 2652 2873 3094 3315
12 482 723 964 1206 1447 1688 1929 2170 2411 2652 2893 3135 3376 3617
22 884 1326 1768 2210 2652 3094 3536 3978 4421 4863 5305 5747 6189 6631
24 964 1447 1929 2411 2893 3376 3858 4340 4822 5305 5787 6269 6751 7234
*Based on 137 lbs/sy (0.0685 tons/sy) of 0.10 ft compacted depth = 2.05 tons/cy
Notes:
[1] The specific gravity of the aggregate will affect the weight of aggregate in the completed mix.
[2] Quantities shown do not provide for widening, waste from stockpile, or thickened edges.
WSDOT Design Manual M 22-01.21 Page 620-3
September 2022