Platforms are made up of primary telescopic beams (adjustable to several lengths) and wooden SH20 beams placed orthogonally on which the walking surface is fixed. They are used inside rectangular/circular closed shafts and allow the support of formworks for wall castings. At their extremities, telescopic profiles have hinged sling-bars located inside specific slots in the walls. Due to the automatic closing mechanism
closed during the lifting phase, platforms are moved with a single crane lift together with formworks up to the next level, where slingbars automatically re-open when reached the slots prepared in the previous phase.