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About us

Steelnium is an expert in design, engineering, fabrication and assembly of modularbuilding. Modules has all components for the realization of contemporary, energy-efficient architecture and supports sustainable building concepts.

Expert in design, engineering, fabrication and assembly of modularbuilding

Steelnium is pleased to provide its partners with comprehensive service competency during all stages of a construction project



The MODULEFORM production plant is located in the new industrial zone in Krapina, 40 km away from the capital Zagreb. It is equipped with the most modern machines located in production halls of 8,000 m2. High-tech CNC machines enable production that is fully automated, and constant control over it is performed by professional technical staff. Suppliers are the world’s leading manufacturers of necessary materials, and are an additional guarantee to ensure high quality of the final product.

The close cooperation in the areas of production technology, employee’straining, software supply and processing directives makes sure that project plans are realized rationally, efficiently and certainly with quality.


Quality and environmental protection

The modules can be stand alone units placed side-by-side, end-to-end, or stacked, allowing a wide variety of configurations and styles in the building layout.

Quality management system according to ISO 9001: 2015

Environmental protection according to ISO 14001:2015

Execution of steel and aluminium structures according to EN 1090-1:2009+A1:2011

Welding of metallic materials according to ISO 3834-3:2007


Certificates and tests

The certificates we have prove our concern for the quality of the offer and customer satisfaction, and at the same time enable us to maintain business processes.

Heat transfer coefficient U = 0.5 W / m2K according to EN ISO 6946: 2017 and EN ISO 10211: 2017

Sound insulation DnT = 54 dB according to EN ISO 140 - 4 and EN ISO 717-1

Fire resistance REI 90 according to EN 13501-2: 2016