The construction, design and service activities in the field of construction with a focus on land, transport, underground, water supply and special construction. These buildings then are single-family houses, but also industrial buildings, roads, railways or bridges.

Repairs of reserved gas equipment in the range: technical equipment gas group A for: h gas consumption by combustion with output over 0.5 MW technical equipment gas group B for: h1 gas consumption by combustion with output from 5 kW to 0.5 MW h2 gas consumption by combustion with power from 5 kW to 50 kW Installation, reconstruction, maintenance ...