Independent Category 3 Checks
Many employers, particularly Highways England and Network Rail, require an independent check of designs. This check must be by a different company to that which did the design and is known as a Category 3 (or Cat 3) check. Rather than check the calculations, a Cat 3 checker must check that the drawings satisfy the design brief.
The check team will do their own calculations to satisfy themselves that the design meets the requirements. PDMA can undertake these checks on your behalf. Usually, by the time we are appointed to do a Cat 3 check, the drawings are complete so we can see exactly what is needed. In these circumstances we are happy to provide a fixed price quotation and timescale for the check.