| BAM | BRE |
| CSTB | BBRI |
| ÉMI | EMPA |
| Enterprise IR | ICI |
| IETcc-CSIC | IGH |
| IMS Institute | INCERC |
| ITB | ITC |
| LNEC | SBi |
| SINTEF | SP |
| TNO | TSUS |
| TZUS | VTT |
| ZAG |
Building Testing and Research Institute

The Building Testing and Research Institute (TSUS) was established in 1953 and registered as a public non-profit making institution since November 2002. It has 8 branches in several regions in Slovakia and its main activities cover the following areas:
- Certification of construction products
- Technical approval of construction products
- Certification of quality systems
- Testing of construction products
- Research and development, such as test and health monitoring methods,durability of materials and products, numerical simulation of construction behaviour, etc..
- Load testing of prefabricates and building and civil engineering constructions. Certification of quality systems
- Review of diagnostic of design and execution of construction works. Testing of construction products.
- Calibration of measuring appliances.