3.4
3.5
01045-3
CUTTING, CORING AND PATCHING
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. Slurry or tailings shall not be allowed to
enter floor drains.
Work area (e.g., adjacent walls, floors, ceilings, pipes, conduits, etc.) shall be
cleaned to remove splash residues from coring operation.
CUTTING
A.
B.
C.
G.
Cutting shall be performed with a concrete wall saw and diamond saw blades of
proper size.
Provide for control of slurry generated by sawing operation on both sides of wall.
When cutting a reinforced concrete wall, the cutting shall be done so as not to
damage bond between the concrete and reinforcing steel left in structure. Cut shall
be made so that steel neither protrudes nor is recessed from face of the cut.
Adequate bracing of area to be cut shall be installed prior to start of cutting. Check
area during sawing operations for partial cracking and provide additional bracing as
required to prevent a partial release of cut area during sawing operations.
Provide equipment of adequate size to remove cut panel.
Slurry or tailings resulting from coring operations shall be vacuumed or otherwise
removed from the area following drilling. Slurry or tailings shall not be allowed to
enter floor drains.
Work area (e.g., adjacent walls, floors, ceilings, pipes, conduits, etc.) shall be
cleaned to remove splash residues from cutting operation.
PERFORMANCE
A.
Perform all required excavating and backfilling as required under pertinent sections
of these specifications. Perform cutting, coring and demolition by methods which
will prevent damage to other portions of the work and will provide proper surfaces
to receive installation of repair and/or new work. Perform fitting and adjustment of
products to provide finished installation complying with the specified tolerances
and finishes.
Coring or cutting which exposes cut surfaces of reinforcing steel or structural steel
shall be coated. Coating shall be 10 mil (dry film thickness) applied in two 5 mil
(dry film thickness) coats of a single component moisture cured coal tar urethane or
two part coal tar epoxy corrosion barrier. Alternately the exposed steel can be cut
back two inches from the surface and a non-shrink grout applied over the steel flush
to the concrete core or cut surface.
Rough patching shall be such as to bring the cut or cored area flush with existing
construction unless otherwise shown.
Finish patching shall match existing surfaces as approved.
END OF SECTION
13089K
