Only way to mount the LG 55″ monitor was from the ceiling. Floor to concrete ceiling was 4.5meter high, we opened an man excess hole on the plaster ceiling to reach the highest point. It was very challenging as height was a concern. But we done it slowly and steadily making sure every step were correct, reducing possible hazards to it’s minimum. End user chose an LG commercial grade monitor with high brightness of 700cd/m2 to project against strong sunlight and it works perfectly!