This is Ralph. He is drilling a 400mm hole in the side of a pipe.
This process involved bolting on a hydrostress drill rig to the concrete required drilling a 400mm hole. Due to the location of the hole required, the drill rig was mounted on an angle as can be seen in the above images.
Ralph works for Sharp Concrete Cutters and Drillers. He is a professional concrete driller and has specialised training in order to determine how the hole ought to be drilled, and what equipment was required to do the job.
See other examples of concrete drilling:
Core drilling techniques are used when tradespeople require precise, circular holes drilled.
Any hole, from 12mm to 500mm diameter, can be achieved to make openings for plumbing, electrical, telecommunications
Stitch drilling is a process where we drill a series of overlapping holes in order to make openings.
Sharp Concrete Cutters and Drillers proudly partners with Holer Diamond Tools to provide our customers with the latest in concrete core drilling technology using diamond matrices developed especially for the New Zealand construction industry.