US Patent 10299588 Modular frame with a U-shaped hook member

A modular frame with a U-shaped hook member includes multiple upright columns each having at least two faces of each of the multiple upright columns have multiple couples of first through hole and second through hole defined therein. Multiple horizontal columns are respectively connected to a corresponding one of the at least two faces of a corresponding one of the multiple upright columns. Two connecting blocks respectively mounted into a corresponding one of two opposite ends of the tube. Two U-shaped hook members are respectively mounted into a corresponding one of the two connecting blocks. Each U-shaped hook member includes a first hook and a second hook extending therefrom and respectively engaged to a lower portion of a corresponding on of the first through holes and the second through holes.