Drilling holes for basement railings

Although many of the upper staircases are made of iron, the main staircase to the basement is constructed of poured cement. Unlike the other floors, in order to put in railings, crews must first drill holes in the cement. This process is time consuming and takes special machinery designed to bore through several inches of concrete. Due to the high friction involved in this process, lubricants are used to keep the machinery from binding. When complete, railings will fit into the holes and be secured in place.
IMG_4157 - Version 2

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