Insinööritoimisto K Sahla Oy is an engineering company offering its expertise mainly to clients in the field of high voltage (≥ 20 kV) electrical substations and transmission lines. The company was established in 2004 and has been serving its clients continuously ever since.

The company’s expertise is based on the personal over 25 years’ long experience of Mr. Kari Sahla (M.Sc in Civil Eng.) as a designer and product developer of substation structures and transmission line foundations.

During his career Mr. Kari Sahla has been co-operating with almost all transmission line and substation contractors who have business in Finland.


We offer design and consultancy services of high voltage transmission line foundations and electrical substation civil engineering structures.

Our specialty includes pre-design (tendering desing) and desing of foundations, design of special foundations in difficult site conditions, third party inspection of new foundation design and expert opinions on structures.

We can also offer strength assessments and refurbishment design of existing foundations, preparation of technical specifications, consultancy, design supervision and training.

Kuikkarinne 1 A 5, 00200 Helsinki

gsm. 050 4098 171
e-mail. kari.sahla(at)

y-tunnus 1873580-6