The existing concrete has been evaluated by means of [core drilling and
destructive testing] [petrographic examination] [determination of rebound
number] [determination of penetration resistance] [ultrasonic
pulse-velocity evaluation]. The results of the evaluation are [given in
_______][available for review at __________].
1.8.2.2
Concrete Core(s)
Concrete core(s) obtained from the structure, which was (were) not
destroyed by testing, is (are) available for viewing at [ ].
1.8.2.3
Embedded Materials
The contract drawings and reference drawings do not constitute a complete
description of all metal parts and other materials that may be encountered,
but represent the best information available to the Government. Other
items, or different locations for items shown, may exist. Exercise care to
avoid drilling through functional embedded items intended to remain in
service.
The Contractor's selection of equipment and methods shall
consider the presence of such materials, and the Government will not be
responsible in any way for the effect of such items on the Contractor's
equipment or progress. Where indicated, remove existing metal items to the
limits noted on drawings.
1.9
SEQUENCING AND SCHEDULING
Unless otherwise specified, perform the work in such sequence that new work
does not damage previously completed work. Do not perform concrete removal
and other operations which cause vibrations within 15 [ ] m (50 [ ] feet)50
[ ] feet of repair materials that have cured less than 24 hours. Provide
protective measures as required to protect completed work.
1.10
CONSTRUCTION TOLERANCES
1.10.1
Concrete Removal
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NOTE: One-inch tolerance is suitable for concrete
removal over six inches deep. For thinner repairs,
a tighter tolerance would be more appropriate. The
methods of removal should also be considered. The
relative costs of achieving closer tolerance should
be weighed against the anticipated benefits.
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Remove concrete to the lines of removal indicated on the contract drawings.
A tolerance of plus or minus [25 mm (1 inch)1 inch] [13 mm (1/2 inch)1/2
inch] will be allowed about the lines indicated [except in the thin wall
areas where no removal beyond that indicated will be permitted]. Concrete
removals that vary by more than the indicated tolerance will be acceptable,
unless evidence indicates that deteriorated concrete is still present or
the variation in tolerance results in a violation of the requirements for
material placement, in which case removal shall continue to the lines
indicated. Additional concrete removal beyond the allowable tolerance will
be acceptable when deteriorated concrete is found as determined in
accordance with paragraph Determination of Removal Limits, and the limits
of such removal are set and approved by the Contracting Officer.
Unauthorized concrete removals in excess of 25 mm (1 inch)1 inch beyond the
lines shown will not be acceptable, and repair of such excess area shall be
SECTION 03931
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