Bridge Design Manual June 2006 WWW.SCDOT.ORG Welcome To The SCDOT Bridge Design Manual Chapter 1 – Bridge Design Section Organization Chapter 2 – Bridge Replacement Project Development Chapter 3 – Procedures for Plan Preparation Chapter 4 – Coordination of Bridge Replacement Projects Chapter 5 – Administrative Policies and Procedures Chapter 6 – Plan Preparation Chapter 7 – Quantity Estimates Chapter 8 – Construction Cost Estimates Chapter 9 – Bid Documents Chapter 10 – [Reserved] Chapter 11 – General Requirements Chapter 12 – Structural Systems and Dimensions Chapter 13 – Loads and Load Factors Chapter 14 – Structural Analysis and Evaluation Chapter 15 – Structural Concrete Chapter 16 – Structural Steel Structures Chapter 17 – Bridge Decks Chapter 18 – Bridge Deck Drainage Chapter 19 – Foundations Chapter 20 – Substructures Chapter 21 – Joints and Bearings Chapter 22 – Highway Bridges Over Railroads Chapter 23 – Bridge Widening and Rehabilitation Chapter 24 – Construction Operations Chapter 25 – Computer Programs Chapter 1 BRIDGE DESIGN SECTION ORGANIZATION SCDOT BRIDGE DESIGN MANUAL April 2006 SCDOT Bridge Design Manual BRIDGE DESIGN SECTION ORGANIZATION Table of Contents Section Page 1.1 BRIDGE DESIGN SECTION...................................................................................1-1 1.1.1 State Bridge Design Engineer..................................................................1-1 1.1.2 Seismic Design and Bridge Design Support Team..................................1-2 1.1.3 Bridge Design Teams...............................................................................1-3 1.1.4 Project Coordination Section ...................................................................1-5 1.1.5 Geotechnical Design Section ...................................................................1-5 April 2006 1-i SCDOT Bridge Design Manual BRIDGE DESIGN SECTION ORGANIZATION 1-ii April 2006 SCDOT Bridge Design Manual BRIDGE DESIGN SECTION ORGANIZATION CHAPTER 1 BRIDGE DESIGN SECTION ORGANIZATION This Chapter presents the organization of the Bridge Design Section and discusses the responsibilities of the functional units within the Section. 1.1 BRIDGE DESIGN SECTION In general, as part of the Preconstruction Division, the Bridge Design Section is responsible for the design and project coordination for new bridges, bridge widenings and, occasionally, bridge rehabilitation projects. Figure 1.1-1 illustrates the functional organization of the Bridge Design Section. The following discusses the responsibilities of each functional unit within the Bridge Design Section. SCDOT BRIDGE DESIGN SECTION Figure 1.1-1 1.1.1 State Bridge Design Engineer The State Bridge Design Engineer is responsible for the overall engineering, administrative, and management activities of the Bridge Design Section. The State Bridge Design Engineer establishes overall Department structural policies and determines the Section’s coordination with units outside of the Bridge Design Section. The functional responsibilities of the State Bridge Design Engineer are to: • lead the administrative and management activities for the Bridge Design Section (e.g., develop budgets, manpower management, schedule meetings); • develop work programs for bridge projects for inclusion in the Department’s annual and 5-year program of projects; April 2006 1-1 SCDOT Bridge Design Manual BRIDGE DESIGN SECTION ORGANIZATION • participate in professional organizations related to bridge design (AASHTO, TRB, AWS, ;s interests and concernsۥ etc.) to represent the Department • oversee the development of: + new and revised sheets for structural designs in the SCDOT Bridge Drawings and Details, available at the SCDOT website; + revisions to the SCDOT Bridge Design Manual; + structural specifications (in a participation role) for the SCDOT Standard Specifications for Highway Construction; and + the structural design criteria used by the Bridge Design Section; • determine the Bridge Design Section’s appropriate participation in public hearings and public informational meetings for projects where the Bridge Design Section is the lead unit; • remain abreast of the key issues on individual bridge projects; • determine the Bridge Design Section’s course of action for any special studies, reports, etc., upon request from the State Highway Engineer, FHWA, etc; • serve as the Section’s focal point for coordination with FHWA, other SCDOT units, etc.; • provide final approval to all structural plans; • ensure that work is implemented according to the Bridge Design Section’s policies and that it complies with the appropriate design standards and criteria; and • ensure that the project design and construction plans are completed on schedule. 1.1.2 Seismic Design and Bridge Design Support Team The Seismic Design and Bridge Design Support Team is responsible for seismic training and for maintaining the SCDOT Seismic Design Specifications for Highway Bridges and its compliance and updates. The Seismic Design and Bridge Design Support Team supports the Bridge Design Teams with any seismic-related issues from the preliminary stages of the bridge projects until the structural design is complete. The Seismic Design and Bridge Design Support Team also works closely with the Geotechnical Design Section to ensure consistency between the structural and geotechnical seismic-related elements of the design. The Seismic Design and Bridge Design Support Team is responsible for the following: • reviews preliminary and 95% bridge plans and provides comments to ensure compliance with the Department’s seismic requirements; 1-2 April 2006 SCDOT Bridge Design Manual BRIDGE DESIGN SECTION ORGANIZATION • monitors the latest developments in seismic design of bridges by active participation in committees and workshops; • overviews seismic research projects (e.g., the SCDOT Seismic Hazard Maps); • works with FHWA in special studies (e.g., Lifelines) and related transportation networks and the Forensic Engineering Implementation Response Plan; and • provides support to the Bridge Construction Office and the Office of Materials and Research. 1.1.3 Bridge Design Teams The Bridge Design Teams are the Bridge Design Section’s focal point for the preparation of all in-house structural designs. The Bridge Design Teams have the day-to-day responsibility to develop structural plans from project inception to letting. The Bridge Design Teams perform the designs, conduct structural analyses of the proposed structures, prepare the bridge plans, and compute bid quantities for bridge projects. The Teams are responsible for reviewing and checking the plans for completeness and accuracy. The specific functional responsibilities of the Bridge Design Teams are to prepare in-house structural designs for all types of highway bridges, including: • the determination of applicable loads to the bridge; • the design of flat slabs (structural analysis, reinforcement, etc.); • the design of prestressed concrete superstructures (structural analysis, flexural strength, shear, bearings, etc.); • the design of structural steel superstructures (structural analysis, splices, diaphragms, fasteners, girder design, etc.); • the design of substructures and foundations (bents, piles, footings, drilled shafts, etc.); • the design of all structural elements to meet the Department’s seismic performance criteria; • coordinating with the Road Design Section to develop the geometric design of the structure (bridge widths, vertical clearances, etc.); • the design of bridge appurtenances (bridge rails, sidewalks, fencing, etc.); • the rehabilitation of existing bridges; • attending field reviews; April 2006 1-3 SCDOT Bridge Design Manual BRIDGE DESIGN SECTION ORGANIZATION • attending project meetings; • meeting the project schedule and man-hour estimates; • assisting in the preparation of the contract documents for structural items, including construction plans, Special Provisions, construction quantities, and engineering cost estimates; • remaining abreast of state-of-the-art-technology in bridge design through review of AASHTO, TRB, FHWA, etc., publications, and investigating the use of new bridge design techniques; • as directed by the State Bridge Design Engineer, investigating and implementing revisions to the: + SCDOT Bridge Design Manual, and + SCDOT Bridge Drawings and Details, available at the SCDOT website; • providing technical support for structural designs for bridge projects on non-State facilities that are funded by State and/or Federal dollars; • serving as a technical resource in structural designs for county and city government bridge projects; • in coordination with the Construction Division, reviewing and approving construction shop plans, shop drawings, working drawings, and working plans; • in coordination with the Construction Division, reviewing Value Engineering proposals from Contractors; and • reviewing and commenting on construction change orders when requested by the Construction Division. The Bridge Design Section staff that develops cost estimates is responsible for the following for in-house projects: • developing Supplemental Specifications and Special Provisions; • working with the Construction Division on revisions and updates to the SCDOT Standard Specifications for Highway Construction; • monitoring unit bid prices for construction; • preparing the Engineer’s Estimate for structural design projects; • performing a cost analysis for each bridge construction contract; and • reviewing the Construction Cost Estimates. 1-4 April 2006 SCDOT Bridge