When the Contractor performs survey work, the Engineer shall verify the Contractor’s accuracy by observation of the work and review of notes. A state survey crew should be available for checking any part where this accuracy is not obtained. The Contractor’s surveyor should cooperate with the Engineer by providing the notes on critical work such as bridge seat elevations, profiles of beams or girders, and grade for finishing the deck for review and concurrence. Information that indicates the elevation of bridge seats and deck grades have been properly set must be recorded in the project file.
Relations between the Engineer and surveyor should be in the spirit of cooperation toward achieving the common goal of bridges constructed of specified quality, in plan location, and on proper grade that will benefit both the state and the Contractor.
When railroad involvement is required as specified in 501.05.A., it is the Contractor’s responsibility to submit plans to the involved railroads for acceptance at least 50 days before construction begins. The Contractor shall supply the Engineer with documentation proving railroad acceptance. Department acceptance is not required.
The following plans should be submitted to the Engineer at least 7 days before construction begins. These plans shall be prepared by an Ohio Registered Professional Engineer (PE) and checked by a second PE. No Department acceptance is required.
1. Sheeting and bracing adjacent to traffic when required by contract
2. Demolition of structures over or adjacent to active traffic
3. Falsework for cast-in-place concrete bridges over 20 feet (6.1 m)
4. Erection of steel or precast concrete structural members
5. Jacking and support of existing structures
6. Construction stresses from equipment in excess of 60,000 pounds (27,000 kg)
7. Structures for maintaining traffic
Although no Department acceptance is required, these plans should be utilized in the field as the standard to judge whether the contractor is performing the work correctly.
Stop all operations that do not follow the prepared plans. The Contractor must submit to the Engineer, any revised plans, prepared by an Ohio Registered Professional Engineer, 24 hours before construction on the deviated work begins.
If the Contractor requests to weld to a main structural member, that are not shown on the contract drawings, he must submit a plan to the Office of Structural Engineering for acceptance at least 20 days before construction begins.
If a Contractor has to perform corrective work on structures items, the Contractor must submit three copies of a corrective work plan(CWP), to the Engineer, including supporting calculations, prepared by an Ohio Registered Professional Engineer. The Engineer will submit the CWP to the Office of Structural Engineering for review and acceptance prior to performing corrective work.
When traffic is maintained while an overhead structure is being removed, platforms, nets, or other devices must be provided to safeguard the traveling public from falling objects that might fall directly onto the roadway below, be deflected toward the traffic, or bounce into the traveled lanes. Removal of superstructure concrete and structural steel shall, in no case, take place directly over traffic due to the possibility of large pieces falling through the protective devices.
This section outlines the contractor’s requirements for fabrication, shop drawings, material certification, and erection procedures.
1. Use Erection Checklist Form CA-S-20.