ML20236N825
| ML20236N825 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 05/28/1987 |
| From: | Hansel J, Schanf J, Zill R EVALUATION RESEARCH CORP. |
| To: | |
| Shared Package | |
| ML20236N530 | List:
|
| References | |
| QI-043, QI-43, NUDOCS 8708120123 | |
| Download: ML20236N825 (11) | |
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EVALUATION RESEARCH CORPORATION COMANCHE PEAK RESPONSE TEAM QUALITY INSTRUCTION FOR ISSUE-SPECIFIC ACTION PLAN NO. VII.c INSTRUCTION: QI-043 UNCONTROLLED COPY
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3 ISSUE DATE: 05-28-87 e
t REINSPECTION OF CONCRETE PLACEMENT f!8!@@
PREPARED BY:
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g APPROVED BY:
DATE:
5-7-@ 7 IS E COORDINATOR
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APPROVED BY:
DATE: b -Ob" T2 ON-SITE QA(_ REPRESENTATIVE o
DATE: 5 N 87 APPROVED BY:
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8708120123 970733 DR ADDCK 05000445 PDR l
e QI-043 Rev. 3 1.0 PURPOSE
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This instruction provides the methods and accept / reject criteria
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for the performance of reinspection of concrete placement.
2.0 APPLICABILITY This instruction applies to the performance of an independent reinspection of a sample of concrete construction activities.
which is described in the Population Description f It Placement.
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3.0 REFERENCES
3.1 Memo QA/QC-RT-487 to A. Patterson from R. H. Brown delinea documentation used in development of procedure, including specific sources for attributes and exclusions.
3.2 CPP-009, " Performance of Reinspection and Documentation Reviews."
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,j Reinspection are performed and documented in accordance with
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established CPRT instructions.
This instruction established the attributes and accept / reject criteria for the reinspection of accessible concrete construction. attributes.
4.1 Responsibilities 4.1.1 QA/QC Inspectors QA/QC Inspectors perform reinspection in accordance with established project procedures and instructions.
Reference 3.2 addresses the method used to perform reinspection and to document and process the results.
l 4.1.2 QA/QC Discipline Enginters The QA/QC Discipline Engineers prepare the Quality Instruction delineating reinspection requirements and attributes.
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Il, QI-043 Rev. 3 4
5.0 INSTRUCTION
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For each placement consisting of separate structural elements A
(walls, slabs, etc.), a separate checklist shall be included for each of these elements. Tolerances indicated are 2 unless not otherwise.
The following attributes are to be inspected per Attachment 61 All measurements shall be done with a steel tape or wood ruler as required, in incremento of 1/8 inch.
Notations made by the inspector per requirements in this instruction for plate numbers, attribute deviations, etc.
generally be made on the applicable drawing included in theshould verification package and identified in the remarks column of the checklist.
checklist, use Attachment 6.2.When additional space is required for rem 1.
Location of:
A.
Walls, columns, piers, pedestals, curbs. pads:
Determine the location of walls and curbs by measuming two opposite terminal points on one face, relative to an adjacent column line.- Determine location of tunnel walls in terms relative to the center lines of tunnel Determine the location of columns, piers, pedestals, and pads by measuring two adjacent mid point faces relative to a pair of orthogonal column lines.
For elements in the Containment Building, locations shall be detennined relative to a radial column line and the center of the Containment Building or to a defined rectangular grid system.
Verify that, for the points indicated, locations are within the following tolerance of the locations required by the design drawings:
For columns, piers, pedestals and pads less than 24" (any face); 1".
For columns, piers, pedestals and pads 24" and greater (any face); 2".
Walls and curbs; 2".
B.
Slabs:
Determine the elevation for the-top of the slab at any one point.
Verify that the elevation is within 2" of
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that shown on the applicable design drawing.
l Concrete topping is not included in the definition of slab thickness.
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4 QI-043 j
R:v. 3 5.0. INSTRUCTION (Cont'd)
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1.
Location of: (Cont'd)
C.
Beams:
Determine the location of the beam as per the instruction for Attribute 1. A, for walls.
When the depth of the beam is the same as the slab thickness, it shall be so noted on the checklist and 1
beam location cannot be verified.
Verify that, at the points measured, the elevation of the top of the beam is within'2" of the elevation required by the design drawing. Verify that, at the points measured, the beam location is within the following tolerance of the location required by the I
design drawing:
For beams framing into piles and columnsi 3/8".
l For Beams framing into walls; 1/2".
2.
Size of:
A.
Walls, curbs, slabs:
NJ Measure opposite surfaces through any two openings to determine thickness of the element.
When only ont opening exists, measure through single opening.
Where openings are not available, measure location of opposite surfaces for the element in accordance with Attribute 1 to determine element thickness.
Verify that the thickness of the element is not less than that required by the design drawing by more than the following tolerance:
Thickness less than 24":
-3/8".
Thickness 24" or more:
-1/2".
For elements with one surface inaccessible because it is backfilled or cast against earth, it shall be so noted on the checklist and size need not be determined.
B.
Columns, piers, pedestals, pads:
Determine the width of each face of the element by measuring across the face at any convenient elevation.
When this is not possible, determine the location of
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both adjacent faces according to the instructions for
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Attribute 1; using these locations and applicable building dimensions, determine the width of the element.
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QI-043 Rsv. 3 5.0 _ INSTRUCTION (Cont'd) 2.
Size (Cont'd)
Verify the width of the element is not less than that required by the design drawing by more than the following tolerance:
Thickness less than 24":
-3/8".
Thickness 24" or more:
-1/2".
For pads, verify that the thickness is within the-following tolerances of that shown on the design I
drawing:
Design pad height less than 6":
-1/4", + 2".
Design pad height 6" to 12":
-1/2", + 2".
Design pad height over 12":
-3/4", + 2" C.
Beams:
Determine the depth of the element according to Attribute 2.A.
Determine the width of the element according to Attribute 2.2.
For beams whose depth is the same as the depth of the slab, element width cannot be determined.
This shall be so noted on the checklist.
Verify that the depth and width of the element are not less than that required by the design drawing by more that the following tolerance:
Required dimension less than 24":
-3/8".
Required dimension 24" or more:
-1/2".
3.
Surface Inspection A.-
Walls, curbs, columns, piers, pedestals, pads:
Inspect all accessible surfaces for honeycombing and voids.
(Inaccessible surfaces are those cast against earth, backfilled, or coated.) If any formwork must be i
removed to perform the.eurface inspection, note this information in the Remarks column.
Verify that honeycombing, abandoned drilled holes, and voids which are visible do not expose any reinforcing steel, or exceeds the rebar concrete cover in the design drawings.
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QI-043 Kov. 3 5.0 INSTRUCTION (Cont'd)
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3.
Surface Inspection (Cont'd)
When not shown in the design drawings use the following values for minimum rebar concrete cover:
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Minimum
_ Cover (in.)
1.
Containment Structure Exposed to weather
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i No. 6 through No. 18 bars 2
No. 5 bars,-and smaller 1 1/2 Not exposed to weather Principal reinforcement, ties and stirrups 1 1/2 Other reinforcement 1
2.
All other structures Exposed to weather No. 6'or larger 2
No. 5 and smaller 1 1/2 II Interior surfaces V
Beams, Girders, and columns 1 1/2 Slabs, Walls, and Joists No. 11 and smaller 3/4 No. 14 and No. 18 1 1/2 An observation of foreign material 1" 2he pour which could constitute a void in the concrete matrix exposing the reinforcing steel or exceeding the rebar concrete cover, shall be considered a deviation to this attribute.
B.
Slabs, Beams:
Inspect the underside of slabs and exposed faces of beams for honeycombing and voids per addition, verify that there are no un, Attribute 3.A. In authorized cold joints.
4.
Cored Holes Inspect the entire accessible surface to identify cored holes.
For each identified cored hole, verify.that the hole is approved per design drawings (including DCA's).
The location of the hole shall be within 2" in any direction of the specified location.
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4 QI-043 Rcv. 3 5.0 INSTRUCTION (Cont'd)
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5.
Cracks For beams and elabs, if in the inspector's judgement questionable cracks are evident, request an evaluation by the Level III inspector.
Otherwise, accept this attribute.
any such questionable cracks, the Level III inspector will, Fce when requested, determine the acceptability of these cracks.
If the Level III believes the crack requires further engineering evaluation, then reject the attribute, and write a deviation report.
attribute.
Otherwise, the Level III will accept the 6.
Patches Verify that major patches (concrete repairs that have resulted from NCR's) are sound by tapping with a 16 oz. hammer on the area of the patch, and comparing the resulting sound with the sound that results when tapping the adjacent concrete.
7.
Anchor Bolts A.
Verify that the total amount of anchor bolts cast in,
concrete is as shown on the design drawings for all equipment and structures.
O Verify bolt size by measuring diameter.
B.
Verify that the s
bolt projection is within +1/2" tolerance of that shown in the design drawings.
bolts.
Reject all unauthorized cut anchor C.
Verify that the bolt distance to the edge of the concre'te is within -1/4" tolerance of that shown in the design drawings.
8.
Embedded Plates and Structural Shapes The following is required for all Embedded Plates and Structural Shapes:
If an embedded plate / structural shape is located within 8 inches from the edge of concrete, provide the as-built location and reference the as-built in the remarks column of the checklist.
Verify that the number of embedded plates / structural shapes, other than strip plates (Ref. Dwg 2323-s-0786) is per design drawings.
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QI-043 Rov. 3 5.0 INSTRUCTION (Cont'd)
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The following is required for Embedded Plates / Structural Shapes
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that have mark numbers designated on design drawings:
i Verify that the mark number of all embedded plates / structural shapes match those shown on the design drawing.
If only part of the mark number is visible (i.e. one or more complete letters and/or numbers that make up the mark number) and there are no incorrect letters and/or numbers, the attribute is accepted.
Enter any "not verifiable". letters and/or numbers on the design drawings and reference the design drawing in the remarks column of the checklist.
If any letter and/or number does not match those shown on the design drawings, the attribute is rejected.
If no part of the mark number is visible, verify that the plate dimensions agree with those shown on the design drawings.
Record on the drawing the status (i.e.:
Mark Number not verifiable, accept or reject) and reference the design drawing in the remarks column of the checklist.
The following is required foy_ Embedded Plates and Structural Shapes that do not have mark numbers deetsnated on the design drawings:
Verify that the plate dimensions agree with those shown on the design drawings.
- -Example: Embedded Strip Plates 6.0 ATTACHMENTS 6.1 Checklist 6.2 Supplemental Remarks 8
4 Attachsenc 6.1 QI-043 Rev. 3
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Page 1 of 2 1
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Locatise A.
Valla. Columns.
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Curbe. Pods 3.
Slabe C.
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Size A.
Valls. Corte.
SIshs 5.
Columns. Piers.
Fedestals C.
Soans 3.
Surface Inspection A.
VallerCurbs.
Columns. Piers.
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Slahs. lesas f10 AAS ST:
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'3 l.1 QI-043 Rev. 3
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COMANCHE PEAK RESPONSE TEAM CHECKt1ST POPULATION DE5C,
VERIFICATION PKG No.
CONCRETE PLACtHENT PACE L OF 1 VERIFICATION ACCEPT REJECT DATE IINAEEE 6.
Cored Notes 5.
Cracke A.
Petchee 7.
Ascher Belte A.
8.
C.
5.
F.abedded Flates and Structural
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[.[a Attachssnt 6.2 QI-043 Rev. 3 -
SUPPLEMENTAL ' REFJJtKS VERIFICATION PACKAGE NO.
I-S-CONC-ATTRIBUTE (NO./ DESCRIPTION)-
REMARKS l
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i Inspector Date I
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