The towers, top to bottom, are a honeycomb lattice made of brickwork. 60 of more than 200 cells were glazed with windows (of three different frame designs), the rest filled with clay and scrap. This unorthodox design was a direct consequence of material rationing by the state – Melnikov was limited to brick and wood, and even these were in short supply. The wooden ceilings have no supporting columns, nor horizontal girders. They were formed by a rectangular grid of flat planks, in a sort of orthotropic deck. The largest room, a 50 square meter workshop on the third floor, is lit with 38 hexagonal windows; equally large living room has a single wide window above the main entrance.