91.100.30 Concrete and concrete products
RT-103 REGLAMENTO TÉCNICO DE BLOQUES HUECOS DE HORMIGÓN (RT-103 Technical regulation on hollow concrete blocks); (15 pages, in Spanish)
The notified regulation covers the following: Purpose and scope;
Definitions;
Specifications;
Provisions for use on site;
Sampling and testing;
Quality control requirements;
Testing laboratory requirements;
Conformity assessment procedure;
General application criteria.