ZF-2 is an existing research tower in the Amazon rainforest near Manaus. Suli Engenharia's role here was the design: a restoration and stair-refit project for the existing structure. Construction was carried out by others.
The refit replaces the original stairs with two-flight stairs, moves the arrival at the top platform to the outside of the tower section, adds a secondary tower at the top, and closes the old stair opening so it becomes part of the platform floor. The new stairs follow the Brazilian accessibility standard NBR 9050 — wide flights, regular step geometry, and guardrails with handrails on both sides.
The work was funded by JICA, the Japan International Cooperation Agency. The images on this page are design renders.
The steel was already standing. The project was making the climb safe and accessible.