Where construction difficulties, problems, or accidents develop on a project, litigation may develop relative to liability for financial losses. This will sometimes question whether the material supplied in accordance with approved shop drawings conforms to the design concept of the project and complies with the project specifications and drawings as prepared by the design engineer.

Emphasis must be placed on the importance of detailing and shop drawings in the construction process and on the fundamental responsibilities of the engineer. The awareness on the part of post-tensioning materials fabricators of the intent of the design engineer is usually limited to the information communicated by the design drawings and contract documents. The post-tensioning subcontractor normally does not have design calculations or other information on the project necessary for complete determination of structural adequacy.

For these reasons, the post-tensioning subcontractor as well as the general contractor must rely on the engineer to determine that the information submitted on the shop drawings is structurally adequate and responsive to the intent of the contract documents. Areas of special concern include details of the post-tensioning tendons, nonprestressed reinforcement, under-floor ducting for electrical or telephone services and any other embedded items, and design and detailing of the concrete member and reinforcement in the area of tendon anchorages.