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STH Steel

Lötvägen 2
68570 Larsmo

STH Steel office

+358 20 741 0190
[email protected]

Dispatch center and reception of goods

+358 50 556 5008


STH-Steel Oy Ab
Business ID: 2183564-8
Address: 003721835648
Operator: Apix Messaging Oy, 003723327487


Sales Manager

David Grankulla

+358 50 528 9752


Project engineer

Samuel Snellman

+358 50 570 7625

Project Manager, DI

Tomi Prittinen

+358 44 056 1454


Production Manager

Alexander Lassfolk

+358 50 340 9874


Welding Engineer, Senior Welding Coordinator, IWS

Jonas Lindell

+358 44 253 5375

Design Engineer, Welding Coordinator, IWS

Jyrki Huopana

+358 50 383 8052


CEO, Sales

Sven Grankulla

+358 50 560 4818

EVP, Development and Quality

Timo Prittinen

+358 44 784 7244

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    Certified steel solutions for demanding projects

    STH Steel is the number one choice for durable and robust steel constructions. We have the certificates needed to offer high-quality products and safe execution.

    EN 1090-1, EXC3

    We have the knowledge and certificates to manufacture CE marked, load-bearing steel structures for the construction industry according to execution class EXC2 and EXC3.

    ISO 9001:2015

    The certificate ensures that STH Steel carries out quality controls to ensure that products, services, and customer service comply with established regulations and statutory requirements.

    ISO 3834-2

    STH Steel works according to extensive quality requirements for welding, in the factory and in the field, as defined in the certificate.