8 Mechanical properties for calculation
8.1 FRP laminates
8.1.1 Tested laminates
Where the mechanical properties used for the scantling determination are derived from tests, these tests shall be conducted in accordance with the applicable or appropriate international standard. Where an international standard does not exist, a national standard may be used instead.
The test specimen shall be representative of the product to be manufactured. In general the specimen shall be manufactured under typical workshop conditions using the same material, fibre contents and sequence, methods of lay-up, thermal treatment, and time delays.
When determining the flexural strength the gel coat side of the specimen shall be stressed in tension.
The tensile strength and modulus shall be determined according ISO 527.
The flexural strength and modulus shall be determined according to ISO 178.
The mechanical properties used in the calculations shall be 90% of the mean first ply cracking failure values.
