mm 10 inch gage length spanning the extremities of the sleeve at a
stress of 200 MPa 30,000 psi. The amount of the additional deformation
shall be determined from the stress-strain curves of the unspliced and
spliced bars tested as required paragraph QUALIFICATION OF
BUTT-SPLICING PROCEDURE for qualification of the butt-splicing
procedure. Tension splices of number 45 14 or smaller bar shall be
staggered longitudinally a minimum of 1500 mm 5 feet or as otherwise
indicated so that no more than half of the bars are spliced at any one
section. Tension splices of number 55 18 bars shall be staggered
longitudinally a minimum of 1500 mm 5 feet so that no more than 1/3 of
the bars are spliced at any one section.
3.2
FIELD TESTS AND INSPECTIONS
3.2.1
Butt-Splices
3.2.1.1
Identification of Splices
The Contractor shall establish and maintain an approved method of
identification of all field splices which will indicate the splicer and the
number assigned each splice made by the splicer.
3.2.1.2
Examining, Testing, and Correcting
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NOTE: If the total number of butt-splices exceed
5,000, the number of tension tests may be decrease
to one test specimen for every 50 splices in excess
of the first 5,000 splices provided that no splices
are rejected in the last 500 splices made and the
splicing operation will not be interrupted for more
than 3 months.
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The Contractor shall perform the following during the butt-splicing
operations as specified and as directed:
a. Visual Examination - All welded splices shall be visually examined
for the presence of cracks, undercuts, inadequate size and other
visible defects. Respliced connections resulting from correction of
visual defects may be radiographically examined at the option of the
Contracting Officer as specified in paragraph SUPPLEMENTAL EXAMINATION.
Exothermic mechanical butt-splices shall be visually examined to
determine if the filler metal is clearly visible at the tap holes and
completely fills the sleeves at both ends except for spaces of not more
than 10 mm 3/8 inch occupied by packing.
b. Tension Tests - Tensions tests to 90 percent of the minimum
specified ultimate tensile strength of the spliced bars or to
destruction shall be performed on one test specimen made in the field
for every 25 splices made. Test specimens shall be made by the
splicers engaged in the work, using the approved splicing procedure and
the same size bars placed in the same relative position, and under the
same conditions as those in the groups represented by the specimens.
Stress-strain curves shall be furnished for each butt-splice tested.
c. Radiographic Examination - Not less than one of each 25 welded
splices selected at random by the Contracting Officer shall be examined
radiographically and evaluated for defects. The greatest dimension of
SECTION 03201
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