Stadium structures should not impede the luminous flux of the pitch lighting system and cause shadows to be cast on the surface of the pitch. Care should be taken to ensure that the luminous flux projection lines to the pitch surface are completely clear.
In the diagram above, the luminous flux of the corner column head-frame is obstructed by the stadium roof. To avoid this, the luminaires on the head-frame should be focused away from the stadium roof structure and additional illuminance provided by luminaires installed under the stadium roof structure.