1982. Report on prestressing steel: 7. Test for the determination of tendon transmission length under static conditions. (PDF)

This technical report describes the determination of the conventional transmission length of prestressing steel in pretensioned prestressed concrete under static conditions.

After the publication of the FIP Technical Report on Prestressing Steel: 2. Anchorage and application of 7-wire strands (FIP/5/4, June 1978), a need arose to revise the test description for conventional transmission length. The word “conventional” is used to differentiate it from the “actual” transmission length, which can only be measured in an actual structure. A step forward is the introduction of the term “draw-in value”, which gives an indication of the “actual” transmission length. Because “draw-in” can be easily measured and inspected during the production of pretensioned prestressed concrete elements, it can contribute to the quality control of the final product.

Dr Maquoi and the other members of his committee are to be congratulated on preparing this very good report. It will be of practical value as it offers a platform on which to compare test results obtained from laboratories with those from precast concrete manufacturers.