manitoba engineering standard specification...

ENGINEERING STANDARD SPECIFICATIONManitobaOperation

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CIVILCONCRETECAST-IN-PLACE CONCRETE

VALE #TH-SPEC-13003

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REVISIONS

Rev Description Rev’nby

AppSud

AppPC

AppThom

AppVB

AppLH

AppClyd

ApprAct

Issue DateYYYY/MM/DD

1Document format andnumber changed. Previousnumber 1302-01.01.611

DB2011/05/18

AA2011/05/18

Pending Pending Pending Pending Pending Pending 2012/04/30

2 Standard Detail Drawingsadded

AD2013/03/13

AA2013/03/13


3 Minor Drawing RevisionSee Appendix A

AD2013/11/27

AA2013/11/27


4 2015 Review – MinorClarifications & rev’ns

AA2015/08/21

AA2015/08/21


5 Spec approved for MBOperations N/A N/A N/A NK N/A N/A N/A N/A 2016/11/22

Sud = Sudbury, Ontario, PC = Port Colborne, Thom = Thompson, Manitoba, VB = Voisey’s Bay, LH = Long Harbour, Act = Acton, England,Clyd = Clydach, Wales, N/A = Not Applicable


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1.0 PURPOSE

This specification describes the minimum requirements for forming, reinforcing, placing,finishing, curing, protection and acceptance of cast-in-place concrete.

Unless noted otherwise on the contract drawings, this specification supplements therequirements of the Manitoba Work Place Safety and Healthy Acts and its Regulations, LocalBuilding Code (Use Manitoba Building code and Manitoba Work Place Safety and HealthyActs and its Regulations) and the CSA Standard Practices for Concrete CSA-A23.1

2.0 APPLICATION

“Engineering design and specifications only approved for use with Vale Canada Limited,Thompson Operations or its successor or assignee. Any use a third party makes of thisdocument or drawing, or any reliance on or decisions to be made based on it, beyond its usefor Vale Canada Limited purposes are the responsibility of such third parties. Vale CanadaLimited accepts no responsibility for damages, if any, suffered by any third party as a resultof decisions made or actions based on this document or drawing beyond those specifiedherein”.

This specification, applies at any Vale locations indicated with approval on the cover page,with the following exceptions:

2.1 EXCEPTIONS

None.

3.0 REFERENCE DOCUMENTATION

The following documents were used in the development of this document or haveinstructions and procedures applicable to it. They shall be used in their most recent revision.

CSA A23.1CSA A23.2

Concrete materials and methods of concrete construction / Testmethods and standard practices for concrete

CSA A23.3 Design of Concrete StructuresCSA A3000 Cementitious Materials CompendiumCSA A3001 Cementitious Materials for Use in Concrete

The following drawings form part of this specification:85-401-D-12009 Standard Concrete Details – Sheet 185-401-D-12010 Standard Concrete Details – Sheet 2


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85-401-D-12011 Standard Concrete Details – Sheet 385-401-D-12012 Standard Concrete Details – Sheet 485-401-D-12013 Standard Concrete Details – Sheet 5

4.0 REFERENCES

4.1 GENERAL

Publications referred to by this Specification are as listed in CSA-A23.1 asreference material.

4.2 DEFINITIONS

Manufacturer's Directions: means handle and install all manufactured materialin accordance with the manufacturer's printed instructions or specifications.

Concrete: means "Ready-Mixed Concrete".

Approved: means "Approved by Vale Representative".

Proprietary (type): means a manufactured product which is designed, tested andapproved for a specific use according to applicable all codes, standards andregulations.

CSA: means "Canadian Standards Association”

ACI: means "American Concrete Institute”

ASTM: means "American Society for Testing and Materials”

5.0 SUBMITTALS

5.1 SHOP DRAWINGS

Submit reproducible reinforcement and anchor bolt placing drawings, bar bendingand cutting schedules prior to fabrication for review by Vale.

Prepare and submit working drawings of all formwork, falsework and shoring priorto installation unless specifically exempted by the Vale Representative.


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The Vale project drawings take precedence over placement drawings and barschedules unless otherwise instructed by the Vale Representative.

5.2 MILL TEST CERTIFICATES

When requested by Vale Representative, submit mill certificates representativefor each grade type of reinforcing steel, indicating compliance with therequirements of CAN/CSA-G30.18 Latest Edition - Billet Steel Bars for ConcreteReinforcement and ASTM A185 / A185M Latest Edition – Standard Specificationfor Steel Welded Wire Reinforcement, Plain, for Concrete.

5.3 OTHER SUBMITTALS

Letter of certification for formwork, see Section 9.0, Testing and Inspection.

Letter of verification for placement of embedded items and concrete, see Section9.0, Testing and Inspection.

Job schedule indicating the timing of all concreting operations.

6.0 QUALITY CONTROL

Place and identify by name, a competent person in charge of concrete work onthe job site at all times during the erection and removal of the formwork,placement of the reinforcement and concrete, and curing of the cast in placeconcrete.

Ensure concrete, materials, methods of concrete construction, and methods oftest for concrete conform to the requirements of CSA-A23.1 and CSA-A23.2.Keep copies at the job site of CSA-A23.1 and CSA-A23.2 and make themavailable on request to the Vale Representative.

Vale will take samples for quality control testing from the delivered concrete asdeemed necessary by Vale's Representative.


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7.0 MATERIALS

7.1 FORMWORK

Provide forms, falsework, shoring and bracing suitable to obtain the resultsrequired by the project drawings.

Lumber(a) In compliance with the requirements of CSA 086 and CSA 0141 and grade-

marked by an authorized grading authority.

Form Plywood(a) Exterior grade, 19 mm minimum thickness Douglas Fir in accordance with

CSA 0121. Use overlaid resin bonded fiber coated, G1S (Good One Side)grade plywood for the side exposed to the concrete.

Metal Deck Forms(a) Proprietary type, fabricated from commercial Z275 galvanized steel

conforming to ASTM A653 Grade A.

Metal(a) Structural steel conforming to the requirements of CAN/CSA

G40.20/G40.21.

Circular fiber, Void Tubes and Inside Forms(a) Design and construct to withstand the forces imposed on them. Verify

adequacy if requested by the Vale Representative.

Form Ties(a) Use ties with break-back ends or other means of removing tie end to a depth

of 25 mm minimum from the exposed concrete surface.

(b) Where an architectural finish is required, use 20 mm diameter x 38 mm longremovable plastic setback cones. Remove tie ends to a depth of 38 mmminimum from the exposed concrete surface.

7.2 REINFORCEMENT AND ANCHOR BOLTS

Reinforcement Bar(a) Deformed bars of hard grade new billet steel in accordance with CAN/CSA

G30.18 Grade 400R unless otherwise indicated on the project drawings.


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Provide bars free of excessive rust, scale or other substances that willprevent bonding as specified in CAN/CSA A23.1

Anchor Bolts(a) Conforming to CAN/CSA-G40.21 Grade 300W unless otherwise specified on

the project drawings.

Welded Wire Fabric(a) Welded wire reinforcement conforming to ASTM A185/A185M Latest Edition

(b) Provide welded wire fabric of W4 size and larger bar sizes in flat sheetsunless otherwise approved by the Vale Representative.

Steel Fiber(a) Steel fibres conforming to ASTM Standard A820 / A820M Latest edition.

Synthetic Fiber(a) Use only fibers that have been approved by the Vale Representative and

conforming to ASTM C1116 / C1116M.

Tie Wire(a) Minimum #16 gauge annealed wire or an approved patented system.

Bar Supports(a) Proprietary type fabricated from commercial galvanized cold-drawn wire,

plastic or precast concrete.

7.3 JOINTS AND EMBEDDED ITEMS

Use proprietary type embedded items and accessories unless otherwise indicatedon the project drawings.

Floor Control Joints(a) Fabricated from commercial galvanized metal or an approved patented

system.

Joint Sealant(a) One or two component polyurethane, self leveling or non sag as required,

unless otherwise indicated on the project drawing.


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Joint Filler(a) Asphalt Fiber Type or PVC Foam Type, conforming to ASTM D1751,

Nonextruding and Resilient Bituminous Type or ASTM D1752 type 1,Preformed Sponge Rubber Expansion Joint Fillers.

Waterstops(a) Polyvinylchloride (PVC) conforming to CAN/CGSB 41-GP-35M.

Moisture Barrier(a) Polyethylene film, 6 Mil conforming to ASTM C171 (Standard Specification

for sheet materials for Curing Concrete). Use white opaque pigmentedsheets for curing concrete.

Channel Inserts(a) Continuous type, fabricated from commercial galvanized minimum 12 ga.

cold-formed mild steel, complete with low density polystyrene foam filler.

7.4 CEMENT AND ADMIXTURES

Cement(a) Portland Cement type GU conforming to Standard CAN/CSA A3000 &

A3001.

Coarse Aggregates(a) Maximum size of coarse aggregates in accordance with CSA-A23.1 but not

greater than 20 mm, unless otherwise specified on the project drawings.

Air-Entraining Admixtures(a) In accordance with ASTM Standard C260.

Chemical Admixtures(a) In accordance with ASTM Standard C494.

Superplasticizing Admixtures(a) In accordance with ASTM Standard C494.

Pozzolanic Mineral Admixtures(a) In accordance with CAN/CSA A3001.

Bonding Agent and Structural Adhesive


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(a) Two-component, solvent free, epoxy resin system unless otherwise specifiedon the project drawings.

(b) For vertical, overhead and moist applications, use a moisture tolerant, non-sag type.

(c) Do not use latex adhesive concentrate as a bonding agent.

Concrete Curing Agent(a) White pigmented liquid membrane forming compound in accordance with

ASTM C309-07.

7.5 REJECTION OF MATERIALS

Remove from site all material identified as damaged, not meeting thespecifications or that cannot be identified.

8.0 CONSTRUCTION

8.1 FORMWORK

Design(a) Design and construct formwork, falsework and shoring in accordance with

the Occupational Health and Safety Act, CAN/CSA S269.3 and CAN/CSAS269.1, and ACI 347R. The design shall be approved and sealed by aProfessional Engineer registered in the Jurisdiction having authorities.

(b) Install patented accessories, pre-fabricated forms, shoring or scaffoldingaccording to the manufacturer's recommendations and load rating.

Drawings(a) Sealed and signed by a Registered Professional Engineer licensed to

practice in the province of Manitoba.

General(a) Deliver, store and handle formwork so that no damage or contamination of

formwork surfaces occurs.

(b) Assemble forms smooth, clean, free from warps, splits, holes and bulges.Maintain mortar tight and free from open joints.


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(c) Use strippable forms unless otherwise specified by the project drawings.

(d) Construct formwork to within tolerances according to CSA-A23.1

(e) Chamfer exposed corners of concrete work 20 mm (¾ inch) at 45 degreesunless otherwise specified on the project drawings.

(f) Grease and wrap threaded projection of anchor bolts or otherwise protectfrom damage and fouling.

Preparation of Formwork Surfaces(a) Apply approved non-staining parting agent on all faces of forms against

which concrete is to be placed. Apply parting agent prior to placement ofreinforcing steel, anchoring devices and embedded parts.

Construction and Control Joints(a) In accordance with CSA-A23.1.

(b) Construction joints not indicated on the project drawings are subject toapproval by the Vale Representative.

(c) Key and dowel construction joints as specified on the project drawings.

(d) Continue reinforcement through the joint in its normal position unlessdetailed otherwise on the project drawings.

8.2 FABRICATION AND INSTALLATION OF REINFORCEMENT AND ANCHORBOLTS

Fabricate and install anchor bolts in accordance to the project drawings.

Fabricate and place reinforcement bars in accordance with CSA-A23.1.

Install lap splices in accordance with CSA-A23.3 for a Class B tension lap spliceunless otherwise specified on the project drawings.

Cut and bend reinforcement bars prior to installation.

Bend all reinforcement bars cold. Do not bend projections of cast-in-place bars oranchor bolts.


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Do not oxy-acetylene torch cut or bend reinforcement bars unless approved bythe Vale Representative.

Do not weld reinforcement bars unless approved by Vale Representative.

Use only proprietary plastic or precast chairs and spacers where the undersideconcrete surface is to remain exposed.

Secure reinforcement steel against displacement. Tie bars every fourthintersection with a maximum untied length of one metre (3 feet).

8.3 CONCRETE MIX

Mix Design(a) Design mix proportions in accordance with CSA-A23.1, Alternative

Number 1 - and the requirements of the project drawings.

(b) Provide a workable concrete mix consistent with placement and finishingrequirements, and that will not easily segregate or bleed excessively.

Durability Requirements(a) Ensure concrete mix conforms to Exposure Classification F-2 for surface

applications, and S-3 for underground applications in accordance withCSA-A23.1, unless otherwise specified on the project drawings. Class N isnot permitted.

Admixtures(a) Admixtures are subject to approval by the Vale Representative.

(b) Air-entrain concrete in accordance with CSA-A23.1 as specified on theproject drawings.

(c) Add approved admixtures into solution prior to use in accordance with themanufacturer's recommendations.

8.4 CONCRETE PLACEMENT

Place concrete in accordance with CSA-A23.1 and the project drawings.

Thoroughly clean, all formwork, reinforcement, and equipment used to depositconcrete. Remove debris within the forms before concrete is placed.


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Deposit concrete as close as practicable to its final position to avoid segregationdue to re-handling or flowing. Lateral movement of concrete is not permitted.

Thoroughly consolidate all concrete by vibration during placement such that theconcrete is worked around the reinforcement, embedded fixtures and into formcorners.

For monolithic construction, place each concrete layer while the underlying layeris still responsive to vibration. Layers to be sufficiently shallow to permit bondingof the two layers together by proper vibration.

8.5 CONCRETE FINISHING

General(a) Finish concrete in accordance with CSA-A23.1.

(b) Place only that amount of concrete which can be adequately worked.

(c) Do not use wood floats on air-entrained concrete.

(d) Scratch finish concrete surfaces on channel stair treads.

Unformed Surfaces - Floors or Slabs(a) Work the concrete surface while it is sufficiently plastic to achieve the

desired grades, elevations and texture.

(b) Do not perform a finishing operation on the surface of a concrete slabwhile bleed water is present. Delay finishing operations until the waterevaporates or remove in accordance with CSA-A23.1.

(c) Do not apply dry cement powder, cement paste or similar mixtures onbleed water or apply water to aid in finishing.

(d) Finish concrete surface in accordance with CSA-A23.1, Class A Finish(hand screeded and steel trowel finished). Work the surface to produce adense surface, free from ridges, voids or machine marks, unless otherwisespecified on the project drawings. Surface tolerance shall not be less thanFF20/FL15, with waviness index (SWI) of 5mm and straight edge toleranceof +/-6mm.


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8.6 FLOOR SLABS ON GRADE

Schedule the placing of floor panels on grade to allow 24 hours set beforeadjoining panels are placed.

Except where top and bottom reinforcing steel is noted on the drawings, placereinforcement in the top of the slab. Top reinforcement shall be 50mm (2 inches)clear of the top of the slab. Bottom reinforcement shall be 75mm (3 inches) clearof the bottom of the slab.

Place floor slabs in panels not exceeding 7.5 metres (25 feet) in length betweencontraction joints, in any direction, or exceeding a length to width ratio of 1.5 to 1.L shaped panels are not permitted.

Locate construction joints on column grid lines unless otherwise specified on theproject drawings.

8.7 REMOVAL OF FORMWORK

Dismantle formwork and falsework in accordance with CSA-A23.1.

Notify the Vale Representative before removing any formwork or falsework. Thetiming, method and sequence of removal are subject to approval by the ValeRepresentative.

Remove from site all formwork and falsework unless otherwise specified on theproject drawings.

Do not remove supporting forms and shores until the concrete has obtainedsufficient strength to sustain its own weight and any imposed loads, withoutexcessive deflection or distortion. The minimum compressive strength acceptablefor structural concrete is 75% of its specified 28 day strength, unless a highervalue is specified on the project drawings.

Remove formwork and falsework so that no shock loads or imbalanced loads areimposed on the structure.

For suspended concrete structure and wall subjected to lateral earth pressure, donot remove formwork until approved by the engineer.


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8.8 TREATMENT OF FORMED SURFACES

Produce a final surface conforming to a Smooth-Form Finish in accordance toCSA-A23.1, free from offsets, depressions, pits voids, blemishes, defectiveconcrete, unless otherwise specified on the project drawings.

Produce a final surface with surface irregularities which conform to therequirements of ACI 347 for a Class C surface, as follows unless otherwisespecified on the project drawings.

Permitted irregularities in formed surfaces checked with a 5 ft. template:Gradual : 6 mmAbrupt : 6 mm

Do not repair or surface treat prior to inspection by the Vale Representative.

Repair serious defects, such as large voids or honeycombing in structuralelements as directed by the Vale Representative.

8.9 CONCRETE CURING AND PROTECTION

General(a) Cure and protect concrete in accordance with CSA-A23.1.

(b) Ensure that concrete temperature "as placed" is within the rangespecified by CSA-A23.1.

(c) Cure unformed surfaces and formed surfaces in which the forms havebeen removed before the prescribed curing period, according to one ormore of the following procedures:

(i) Burlap and Water(ii) Moisture Vapour Barrier(iii) White Pigmented Liquid Membrane Forming Curing Compound (do

not use if water-cement ratio is 0.4 or less).

(d) The curing materials, curing method and protection of the concrete aresubject to approval by the Vale Representative.

(e) Do not place concrete when the curing and protection designed for it isinsufficient for the actual or expected weather conditions.


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(f) Supply and install thermometer tube inserts and provide any reasonableassistance to the Vale Representative as required to measure theconcrete and ambient air temperatures, if requested by the ValeRepresentative.

(g) When the daily mean ambient temperature is above 5oC, curing shouldbe continuous for 7 days or for the time necessary to attain 70% of thespecified compressive strength, whichever period is less.

Hot Weather(a) Perform hot weather concreting in accordance with CSA-A23.1. Do not

place concrete when the temperature of the formwork, reinforcing steelor the material on which the concrete is to be placed exceeds 30oC.

(b) Cover exposed concrete surfaces and formwork left in place during thecuring period with burlap and maintain thoroughly wet during the curingperiod

Cold Weather(a) Perform cold weather concreting in accordance with CSA-A23.1. Design

the protection for the worst condition that can be expected as forecastfrom the nearest meteorological office and site conditions.

(b) Provide a protective system that retains the heat of the concrete mix andproduces adequate curing conditions, and when necessary, suppliesadditional heat.

(c) Do not use salamanders, oil or gas burners and similar spot heaterswhich have an open flame and intense local heat.

(d) Do not use straw or hay as an insulating material.

(e) During cold weather when dry heating is used to maintain concretetemperature, one of the following moist curing conditions is to be met forthe duration of the curing period:

1. Maintain a relative humidity of 95% or more in the atmospheresurrounding the concrete and formwork.

2. Maintain exposed surfaces of the concrete within the enclosuresufficiently moist for curing in accordance with CSA-A23.1.


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3. Retain the original moisture in the concrete by covering with animpervious moisture barrier, applying an approved curingcompound and/or by maintaining the forms in contact with theconcrete surface.

(f) Maintain protection until the curing period has terminated and theconcrete cooled sufficiently to comply with CSA-A23.1 for maximumpermissible temperature differential between concrete surface andambient.

8.10 DAMPPROOFING AND WATERPROOFING

Dampproof and/or waterproof floors on ground and exterior surfaces of wall andfootings below finished grade in accordance with the Manitoba Building Code.

Prepare concrete surfaces for dampproofing and waterproofing in accordancewith CSA-A23.1.

9.0 TESTING AND INSPECTION

9.1 INSPECTION PRIOR TO CONCRETING

Notify and obtain permission to proceed from the Vale Representative at least 24hours prior to any concreting operation, including but not limited to:

1. shop fabrication

2. placement of reinforcement and embedded items

3. erection of formwork

4. placement of concrete

5. removal of formwork

6. termination of protection and curing

7. repair work, finishing and damproofing

Provide a letter of certification by a registered professional engineer for the safetyof all formwork, the overall scheme of formwork, and proposed constructionmethods when requested by the Vale Representative. Furnish the structural


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analysis, drawings and test data used in planning and implementing the formingand shoring system to the Vale Representative.

Provide a letter of verification that the reinforcing steel, anchors, sleeves, insertsand conduits have been correctly installed and that the construction methods,rates, equipment and sequence are capable of producing the desired concrete ina manner acceptable to Vale when requested by the Vale Representative.

9.2 CONCRETE TESTING

In accordance to CSA-A23.1 and CSA-A23.2.

All required sampling, preparation of specimens and testing will be performed byVale, or an independent testing agency selected by, employed by and responsibleto Vale.

Supply materials for testing and co-operate fully for the purposes of testing.

Test cylinders, site cured as nearly as possible as the concrete they represent willbe used to establish the termination time for curing or for form removal unlessotherwise approved by the Vale Representative.

The following may be performed by Vale or its authorized testing agent:1. Testing of cement and aggregates.

2. Sampling of concrete, make and cure test cylinders and performcompressive strength tests.

3. Slump tests for each truck load of concrete.

4. Air content tests for each truck load of concrete.

5. Additional tests as required when any change is made to theconstruction sequence, materials consumed or as deficiencies arediscovered.

The Vale Representative has the right to reject concrete which does not conformto the specifications and CSA-A23.1.


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9.3 FREQUENCY AND NUMBER OF TESTS REQUIRED

Compressive strength tests will consist of three cylinders and made for every 30cubic metres or fractions thereof for each class of concrete placed, each day.One laboratory cured test cylinder will be tested at 7 days, the remaining two at28 days.

When it is necessary to determine the strength of concrete prior to 28 days,sufficient additional sets of concrete cylinders will be cast and cured in place inthe same manner as the concrete that the samples represent unless otherwiseapproved by the Vale Representative.

9.4 INVESTIGATION OF LOW STRENGTH RESULTS

If concrete testing indicates inadequacies in the concrete, core testing will beconducted in accordance with CSA-A23.1 and CSA-A23.2.

When core tests fail to provide assurance of structural adequacy, Vale reservesthe right to specify any corrective measures that may be necessary includingstrengthening or replacement of those portions deemed to be unsatisfactory.

10.0 ALTERNATE MATERIALS AND CONSTRUCTION METHODS

Do not substitute materials, construction methods, mix designs, sizes, grades, locations ofreinforcement bars or embedded items unless approved by the Vale Representative.

11.0 APPENDICES

Appendix A: Revision and Transition NotesAppendix B: Keywords


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Appendix A: Revision and Transition Notes

(Revisions are listed in reverse chronological order with most recent revision at the top.Revision notes describe: what was changed, why it was changed, and the plan to implementthe change, including whether changes are retroactive)

Revision 5Approved for Manitoba Operations

Revision 42015 Review – Minor RevisionsSection 7.1 – Plywood changed to 19mm thick G1SSection 7.4 – Concrete curing agent now refers to ASTM C309-07Section 8.5 – Surface tolerance minimum changed to not less than FF20/FL15

Revision 3Standard detail drawing 99-999-D-004278 revised – Minor revision to Detail C-028 –Dimensions corrected.

Revision 2Standard Details Drawings that form part of this specification have been added to Section 3– Reference Documentation. The contents of these drawings were previously individualdetails that were embedded in word documents in the old 1300 series of EngineeringStandards.

Revision 1Document format and number changed due to Vale Engineering Document Programchanges in 2011. Previous Standard number was 1302-01.01.611 Rev 5.

Document revised to conform to latest requirements and changes to the applicable CSAStandards.

Appendix B: Keywords

1302-01.01.611, concrete, cast-in-placeSPEC-13003

manitoba engineering standard specification...

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