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Post-Tensioning Manual
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The installation, stressing and grouting of post-tensioning tendons should be supervised, performed and inspected by personnel with appropriate qualifications and experience. It is recommended that owners ensure the qualifications of the contractor's personnel through either a prequalification process or by requirements specified in standard or project specifications. A prime contractor may also engage specialized sub-contractors with appropriate pre-qualifications to perform the work. Construction Engineering Inspection (CEI) personnel are most often chosen through a merit based selection process. It is recommended that the requirements of this selection process also include specific requirements for pre-qualified personnel.
The following sections are provided to guide in the development of qualifications and experience of key personnel for the construction and inspection of post-tensioned bridges.
The Project Engineer should be a registered Professional Engineer with five years experience of bridge construction of which three years is in post-tensioned concrete. Experience should include post-tensioning and grouting operations including at least one year in responsible charge of post-tensioning related engineering activities.
This Project Superintendent/Manager should have either a minimum of ten years of bridge construction experience or be a registered Professional Engineer with five years of bridge construction experience in which three years is in post-tensioned concrete construction. Experience should include post-tensioning and grouting operations including at least one year in responsible charge of post-tensioning related operations.
The Foreman should have a minimum of five years bridge construction experience including two years in post-tensioning related operations and a minimum of one year as a foreman in responsible charge of post-tensioning related operations.
The Crew Foreman should be certified according to the "Post-Tensioning Training Course" of the Post-Tensioning Institute (PTI), or other equivalent and recognized alternative course acceptable to the Engineer. In addition, the crew foreman should have three years job-site experience in post-tensioning operations.
At least one, preferably two, other members of the crew should be likewise certified but need not necessarily have job-site experience.
The Crew Foreman should be certified according to the "Grouting Certification Training Course" of the American Segmental Bridge Institute (ASBI), or other equivalent and recognized alternative course acceptable to the Engineer. In addition, the crew foreman should have three years job-site experience in the grouting of post-tensioning tendons.
At least one, preferably two, other members of the crew should be likewise certified but need not necessarily have job-site experience.
For vacuum grouting operations, either the grouting crew foreman or the foreman of a specialist (sub-contractor) vacuum grouting crew should have received training and experience in the use of vacuum grouting equipment.
The Resident Engineer or Senior Project Engineer should be a registered Professional Engineer with three to five years experience in general bridge construction and be able to demonstrate knowledge of the importance of post-tensioning and grouting.
The Project Engineer should be a registered professional engineer with three to five years experience in general bridge construction or be a non-registered engineer with at least eight years in general bridge construction. Of this experience, at least two years should be in post-tensioned bridge construction. This experience should include post-tensioning and grouting operations. In addition, this experience should include one year in responsible charge of the construction inspection of post-tensioned bridge construction and be able to demonstrate knowledge of the importance of post-tensioning and grouting.
The Lead Inspector person should have five years experience of general bridge construction including at least two years in post-tensioned bridge construction. Experience should include monitoring of post-tensioning and grouting operations, including at least one year as the Lead Inspector in responsible charge of inspection.
In addition the Lead Inspector should be certified according to both the "Post-Tensioning Training Course" by the Post-Tensioning Institute (PTI) and "Grouting Certification Course" of the American Segmental Bridge Institute (ASBI) or other equivalent and recognized alternative courses acceptable to the Owner.
Inspectors should have at least one year experience in the inspection of post-tensioning and grouting operations and be certified according to both the "Post-Tensioning Training Course" by the Post-Tensioning Institute (PTI) and "Grouting Certification Course" of the American Segmental Bridge Institute (ASBI) or other equivalent and recognized alternative courses acceptable to the Owner.
