A worker has died by falling 12 floors to the ground of an elevator shaft in a residence construction in Istanbul late on Monday.Satılmış Yıldız, 35, was trying to set up a scaffold on the 6th floor of the building when he fell to the ground on the -7th floor.The incident took place in the upscale residence construction in Istanbul's Mecidiyeköy district named "Quasar", which is located next to the project in which 10 workers lost their lives due to an elevator fault in September 2014.