The stringers and the underside of the VST-stairs consist of 24mm thick cement-bonded particle boards. The risers consist of removable wooden formwork. The reinforcement is already installed at the factory. On the construction site, the stairs are concreted out, and the concrete core bonds with the cement-bonded particle boards. The wooden formwork is removed.
VST-stairs can be ordered in any size and can be quickly and easily assembled on site at an early stage of construction. This means that the use of ladders can be partly dispensed with during construction, which reduces the risk of accidents on the construction site. VST staircases can be combined with various sound insulation solutions.
VST-staircases have fire protection class A2-s1, d0.