ITEM 501 STRUCTURES—GENERAL
501.01
General
501.02
Verification of Dimensions
501.03
Notification of Fabricator
501.04
Shop Drawings
501.05
Approval of Construction Plans
501.06
Test Reports
501.07
Erection Stresses
501.01 General. This specification includes the general requirements for building for the various items that constitute the completed structure.
Perform the work, including fabrication, erection, and construction, so that the entire structure and all its component parts will function as designed.
501.02 Verification of Dimensions. Verify that all dimensions established by the Engineer are correct.
501.03 Notification of Fabricator. If furnishing materials under Items 513, 515, 516, 517, and 518, select a fabricator from the pre-qualified fabricators list in effect the date of the Contract letting. Before or at the preconstruction conference, provide a written notification to the DCE and Office of Structural Engineer of the selected steel fabricators and to the DCE and the Laboratory of the selected precast concrete fabricators.
501.04 Shop Drawings. Provide shop drawing detailing structural steel, metal structural elements, prestressed concrete members, precast concrete structural elements, and other similar materials requiring either shop or field fabrication according to AASHTO Standard Specifications for Highway Bridges and Item 501.
A. Contractor Acceptance of Shop Drawings for Items 513 and 515. After preparing the shop drawings for Items 513 and 515, submit them to the Director so that the Director receives them at least 7 days before the pre-fabrication meeting, or before the start of fabrication on Item 513, UF Level. Department approval of these shop drawings is not required.
Include in the shop drawing submission a written acceptance letter and four copies of each drawing, unless additional copies are requested. For structures carrying railroad traffic, furnish 4 additional sets of shop drawings for each railroad company involved. Also, furnish the fabricator’s quality control specialist with one additional set of these drawings before the pre-fabrication meeting.
Prepare the shop drawings by or under direct supervisory control of an Ohio Registered Engineer having personal professional knowledge of AASHTO Standard Specifications for Highway Bridges, and Items 513 and 515. The Registered Engineer shall seal and date each drawing. Have all questions and comments addressed before submitting the shop drawings.
The Contractor’s written acceptance letter shall document acceptance of the shop drawings including confirmation of field verification, as required, and descriptions of issues resolved between the Contractor, the fabricator, or the Department.
By accepting these shop drawings, the Contractor represents to the Department that all dimensions and elevations of existing conditions shown on the plans have been field measured and verified, and that these shop drawings comply with all the materials requirements, construction requirements, contract requirements, and performance criteria. The Contractor further represents that these drawings have been coordinated and verified with the details of the work to be performed by other fabricators and entities on the project. The Department will not make any allowance for additional cost or delays to the Contractor for incorrect fabrication as a result of failure to coordinate or perform this acceptance.
If the Department requests changes on these shop drawings, or the Contractor makes changes in addition to those expressly requested, ensure that the shop drawings are accepted as above with suitable revision marks to identify the changes.
Schedule the pre-fabrication meeting after the Director receives the drawings. Fabrication may begin after the pre-fabrication meeting is complete or after receipt of Item 513, UF Level drawings.
B. Fabricator Coordination of Shop Drawings for Items 516, 517, and 518. The Contractor and fabricator must coordinate these shop drawings. Ensure that shop drawings meet requirements for materials, field measurements, construction requirements, contract requirements, performance criteria, and similar data. The coordination must also include details of the work to be performed by other fabricators and entities on the project. The Department will not make allowance for additional cost or delays to the Contractor for incorrect fabrication as a result of failure to coordinate or perform this coordination.
Submit two copies of the shop drawings to the Engineer with the delivered materials to the project until after submitting the drawings. Department approval of these shop drawings is not required.
C. Shop Drawing General Requirements. Specific requirements are specified in Item 513, 515, 516, 517, or 518.
Make the prints from tracings, neatly and accurately drawn on 22 ´ 34-inch (559 ´ 864 mm) sheets.
After all fabrication is completed, for Item 513 and 515, furnish to the Director a 35-mm microfilm copy of each shop drawing mounted on an aperture card according to Supplement 1002. If the details shown on a drawing apply to more than one bridge, furnish an aperture card for that drawing for each bridge to which it applies, each card bearing the applicable bridge number. For structures carrying railroad traffic, furnish an additional set of aperture cards or, at the option of the railroad, a set of full-size drawings on Mylar to each railway company involved.
501.05 Approval of Construction Plans. Do not begin work until the Director and all involved railway companies have accepted the following plans. Submit acceptable plans described in 501.05.A and 501.05.F, to the Engineer at least 50 days before construction begins. The Engineer will submit plans to the involved railroads for acceptance before submitting the plans to the Director for acceptance. Submit acceptable plans in 501.05.C and 501.05.G to the Director for acceptance at least 30 days before construction begins. Submit acceptable plans in 501.05.B, 501.05.D, and 501.05.E to the Director at least 20 days before construction begins.
Obtain approval before beginning construction. To obtain approval, submit three copies of the plans plus four additional copies for each railroad involved. Prepare the plans using an Ohio Registered Engineer. The Registered Engineer shall seal and date the plans. Submit two copies of the design computations with the plans.
A. Plans for sheeting and bracing of excavation adjacent to railroad tracks.
B. Plans for falsework for cast-in-place concrete bridges over 20 feet (6.1 m) in span.
C. Plans for the proposed erection and handling procedure for: (1) plate girder bridges, (2) rolled beam bridges except single span bridges with spans less than 80 feet (24 m), (3) trusses, (4) arches, and (5) structures carrying railway traffic. Include on the drawings the complete framing plan showing each girder or beam section by “piece mark,” sequence of erection, load capacity of erection equipment to be used, method of lifting members, splicing procedures, and methods for obtaining structure stability. Use equipment used for erection for unloading and any interim handling.
D. Plans for welding permanent or temporary attachments to main structural members except those shown or permitted by Plans.
E. Plans for the proposed erection of prestressed concrete box beams where erection involves placement of cranes or launching devices on previously erected spans.
F. Plans and procedures for proposed demolition of structures over railroad properties. Include the sequence of work and methods of protecting railroad properties on the drawings.
G. Plans for erection and handling procedure for prestressed concrete I-beam.
Acceptance of the above construction plans does not relieve the Contractor of responsibility for the behavior of the procedures proposed.
A. Contractor Acceptance of Materials for Item 513. Submit certified test data to the Director showing compliance with the requirements of Item 711. Accompany all certified test data with copies of mill shipping notices or invoices showing the quantity and size of material being accepted.
Check this material data and provide a letter of
written acceptance. Submit the
material data and letter of written acceptance to the Director so that the
Director receives them at least 7 days before final shop inspection Item
513,
Levels 1 through 6 or before final shop inspection Item 513, UF Level.
Submit a single copy of this material data for each structure, except where the structure carries railway traffic. Submit one additional copy to each railway company involved.
Additionally for Item 513, Levels 1 through 6 structural steel members, submit one copy of main material, certified test data with a letter documenting the QCFS acceptance to the QA shop inspector before the material passes check point one.
The Department will not accept materials for final inspection at the fabrication shop until the Director receives the Contractor accepted material data.
B. Fabricator Certification of Materials for Items 516, 517, and 518. Ensure that a letter of certification accompanies the fabricated material shipped to the job site, in a format approved by the Director, stating all materials conform to contract requirements. For these materials, the fabricator must retain certified test data, copies of mill shipping notices, or invoices showing the quantity and size of material being accepted. This data shall provide complete traceability to the producing mill and proof of domestic origin, as required by ORC 153.011.
Do not deliver materials to the project without the certification letter.
501.07 Construction Stresses. If equipment having a gross weight in excess of 60,000 pounds (27,000 kg) is to be placed on, or driven across, a structure, submit the structural analysis showing the stresses produced by the equipment and associated loads to the Director for review and approval.
Do not allow equipment having a gross weight in excess of the posted limit be placed on or driven across a structure.
Do not allow erection and construction methods, or use or move erection or construction equipment on or across the uncompleted or completed structure to subject any part of the structure to unit stresses that exceed by more than one-third the allowable unit stresses, as given in AASHTO Standard Specifications for Highway Bridges.