UFC 3-220-01N
15 AUGUST 2005
distress include: settlement or swelling of the backfill around the structure; sudden or
gradual change of instrumentation data; development of cracks in structural walls; and
adverse seepage problems. Detailed construction records are important for defining
potential distress areas and assessing the mechanisms causing the distress.
8-6
SPECIFICATION PROVISIONS
8-6.1
General. The plans and specifications define the project in detail and
show how it is to be constructed. They are the basis of the contractor's estimate and of
the construction contract itself. The drawings show the physical characteristics of the
structure, and the specifications cover the quality of materials, workmanship, and
technical requirements. Together they form the guide and standard of performance that
will be required in the construction of the project. Once the contract is let, the plans and
specifications are binding on both the Contracting Officer and the contractor and are
changed only by written agreement. For this reason, it is essential that the contractor
and the Contracting Officer's representative anticipate and resolve differences that may
arise in interpreting the intent and requirements of the specifications. The ease with
which this can be accomplished will depend on the clarity of the specifications and the
background and experience of the individuals concerned. Understanding of
requirements and working coordination can be improved if unusual requirements are
brought to the attention of prospective bidders and meetings for discussion are held
prior to construction. Situations will undoubtedly arise that are not covered by the
specifications, or conditions may occur that are different from those anticipated. Close
cooperation is required between the contractor and the inspection personnel in
resolving situations of this nature; if necessary, to be fair to both parties a change order
should be issued.
8-6.2
Preparation of Contract Specifications. Preparation of contract
specifications is easier if an outline of general requirements is available to the
specification writer. However, it would be virtually impossible to prepare a guide
specification that anticipates all problems that may occur on all projects. Therefore,
contract specifications must be written to satisfy the specific requirement of each
project. Some alternate specification requirements that might be considered for some
projects are discussed below.
8-6.2.1
Excavation. The section of the specifications dealing with excavation
contains information on drainage, shoring and bracing, removal and stockpiling, and
other items, and refers to the plans for grade requirements and slope lines to be
followed in excavating overburden soils and rock.
8-6.2.2
to submit a plan of his excavation operations to the Contracting Officer for review. The
plans and specifications will require that the excavation and subsequent construction
and backfill be carried out in the dry. To meet this requirement, a dewatering system
based on the results of groundwater studies may be included in the plans. Also, for
some projects the specifications may require the contractor to submit his plan for
controlling groundwater conditions. The specifications should likewise indicate the
possibility of groundwater conditions being different from those shown in the subsurface
8-76
Previous Page
