WSDOT Bridge Design Manual M 23-50.21 Page 12-i June 2022 Chapter 12 Quantities, Costs, and Specifications Contents 12.1 Quantities - General ....................................................... 12-1 12.1.1 Cost Estimating Quantities ............................................. 12-1 12.1.1.A Conceptual Stage .......................................... 12-1 12.1.1.B Preliminary Plan Stage ...................................... 12-1 12.1.1.C Design Stage .............................................. 12-1 12.1.1.D Final Contract Quantities ..................................... 12-1 12.1.2 Not Included in Bridge Quantities List ..................................... 12-1 12.2 Computation of Quantities.................................................. 12-2 12.2.1 Responsibilities ...................................................... 12-2 12.2.1.A Design Unit ............................................... 12-2 12.2.1.B Bridge Project Support Unit ................................... 12-2 12.2.2 Procedure for Computation ............................................. 12-2 12.2.3 Data Source ........................................................ 12-3 12.2.4 Accuracy ........................................................... 12-3 12.2.4.A Preliminary Quantities ....................................... 12-3 12.2.4.B Final Quantities ............................................ 12-3 12.2.5 Excavation ......................................................... 12-3 12.2.5.A Structure Excavation, Class A ................................. 12-3 12.2.5.B Special Excavation ......................................... 12-5 12.2.6 Shoring or Extra Excavation, Class A ..................................... 12-6 12.2.7 Piling .............................................................. 12-8 12.2.8 Conduit Pipe ........................................................ 12-8 12.2.9 Private Utilities Attached To Bridge Structures .............................. 12-9 12.2.10 Drilled Shafts........................................................ 12-9 12.3 Construction Costs ...................................................... 12-10 12.3.1 Introduction ........................................................ 12-10 12.3.2 Factors Affecting Costs ............................................... 12-10 12.3.2.A Type of Structure .......................................... 12-10 12.3.2.B Location of Project Site ..................................... 12-10 12.3.2.C Size of Project Contract..................................... 12-10 12.3.2.D Foundation Requirements ................................... 12-10 12.3.2.E Sequencing of Project ...................................... 12-10
Chapter 12 Quantities, Costs, and Specifications
Apr 28, 2023
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