| The COMSA Group is also involved in the construction of premises for depots and workshops for railways and tramways, including cleaning modules, train storage modules, storerooms, etc.
COMSA has also built railway sidings for the Railway Administrations and for industry.
- Unión Explosivos Rio Tinto
- New Miribilla station for RENFE-Bilbao Ría 2000
- Structural repair works for the Bio-Bio Bridge over the Bio-Bio river, in Gran Concepcion, Chile.
- AUSTRALIA-MVM Rail. New railway installation at the Wilpinjong mine (NSW). Thiess
- Torras
- Altos Hornos del Mediterráneo
- Asland
- Atienza
- Basf
- Bayer
- Campsa
- Cristalera Española
- Endesa
- Ford España
- Gec Alsthom
- Central Nuclear de Vandellós
- General Motors
- Hidroeléctrica Española
- Mercabarna
- Philips
- Repsol-Butano
- Seat-Volkswagen
- Siderúrgica del Mediterráneo
- Siemens
- Solvay
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