Introduction
One of the construction methods use universal columns or H-beams as the bearing structure and pilot holes need to be prebored prior to the insertion of the beams. The machines HD180, HD205P, HD3250 and HD3260 are suitable for preboring especially in hard formations with the use of DTH systems.
One of the construction methods use universal columns or H-beams as the bearing structure and pilot holes need to be prebored prior to the insertion of the beams. The machines HD180, HD205P, HD3250 and HD3260 are suitable for preboring especially in hard formations with the use of DTH systems.
