How can screwing a massively heavy object to a wall with four screws (like a water tank) be safe? I feel its always going to fall, taking a piece of the wall with it.

Question

Or screwing workout equipment which you constantly pull with your own weight.

EDIT: Forgot to add, I’m not in the US, I’m talking about brick or concrete walls, not drywalls. Although probably the basic principle applies when it comes to explaining how force works.

In: Physics

Answer 1

In industrial settings, washing machine size transformers are often mounted to walls to provide more floor space below them. There’s usually a metal frame on the wall, and another on the opposite side connected to the interior by long bolts. The wall in between is usually cinder block or poured/reinforced concrete.