The shape of the steel section

Like bones supporting muscles and organs, a high-rise building requires a sturdy frame to support the floors and building materials. Steel or concrete beams are connected to the skeleton to support vertically growing buildings. Buildings are constantly influenced by natural forces. The crossbeam or skeleton needs to be strong enough to resist various forces, from wind to weight to earthquakes. Flat beams are more fragile: when pressure is applied to these beams, the upper part is compressed while the bottom is stretched and tightened. The thinner the crossbeam, the easier it is to bend. The frame composed of simple crossbeams is not sturdy and strong. A crossbeam with a shape is more stable: crossbeams with different shapes formed by horizontal and vertical parts can more effectively resist the tension and pressure acting on the crossbeam. These beams have sufficient stability to support high-rise buildings.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.