B.
3.02
3.03
A.
that all sleeves or forms are at the work and properly set in ample time to prevent delays.
He shall see that all such chases, openings, and sleeves are located accurately and are of proper
size and shape and shall consult with the Engineer and the contractors and subcontractors
concemed in reference to this work.
In case of his failure to leave or cut all such openings or have all such sleeves provided and set in
proper time, Contractor shall cut them or set them afterwards at his own expense, but in so doing
he shall confine the cutting to the smallest extent possible consistent with the work to be done.
In no case shall piers or structural members be cut without the written consent of the Engineer.
The Contractor shall not cut or alter the work of any subcontractor or any other contractor, nor
permit any of his subcontractors to cut or alter the work of any other contractor or
subcontractor, except with the written consent of the contractor or subcontractor whose work is
to be cut or altered or with the written consent of the Engineer. All cutting and patching or
repairing made necessary by the negligence, carelessness, or incompetence of the Contractor or
any of his subcontractors shall be done by or at the expense of the Contractor and shall be
the responsibility of the Contractor.
All cutting and coring shall be performed in such a manner as to limit the extent of
patching.
All holes cut through concrete and masonry walls, slabs or arches shall be core drilled unless
otherwise approved. No structural members shall be cut without the approval of the Engineer and
all such cutting shall be done in a manner directed by him. No holes may be drilled in beams or
other structural members without obtaining prior approval. All work shall be performed by
mechanics skilled in this type of work.
CORING:
Coring shall be performed with an approved non-impact rotary tool with diamond core drills.
Size of holes shall be suitable for pipe, conduit, sleeves, equipment or mechanical seals to be
installed.
If holes are cored through floor slabs they shall be drilled from below.
All equipment shall conform to OSHA standards and specifications pertaining to plugs, noise
and fume pollution, wiring and maintenance.
Provide protection for existing equipment, utilities and critical areas against water or other damage
caused by drilling operation.
Slurry or tailings resulting from coring operations shall be vacuumed or otherwise removed from the
area following drilling.
CUTTING:
Cutting shall be performed with a concrete wall saw and diamond saw blades of proper size.
2019 Sewer Replacement Project Cutting, Coring and Patching
Nashua, NH 01330-2
