The new Mennica Legacy Tower three-story lobby façade in Warsaw is Poland’s largest glass cable net wall, opened in 2019. Class A office space inside the highrise tower can be entered via the one-way cable wall system, which has partial curved areas and utilizes a transparent glazing that “blurs the boundary between interior and exterior space” (Goettsch Architects, Chicago). LED provided full proof engineering structural & façade detailing review, including 1:1 IGU glass warp tests and 1:1 cable deflection & tension tests to assure high safety of the locally edge-clamped glazing and cable end fittings.