It depends on the extent of the work that the Contractor is doing as to whether they are designing anything or not. What does your Works Information require them to do?
ECC Option A can be used for construct only projects or projects that involve design and construction, the only difference is the contents of the Works Information. If the Contractor is doing any design work then usually (in the UK) you would include secondary Option X15 to limit their liability to reasonable skill and care, if they are merely constructing the works then there's no need to include X15.
ECC Option A can be used for construct only projects or projects that involve design and construction, the only difference is the contents of the Works Information. If the Contractor is doing any design work then usually (in the UK) you would include secondary Option X15 to limit their liability to reasonable skill and care, if they are merely constructing the works then there's no need to include X15.