ST. VINCENTCOLLEGE

SIS AND HERMAN DUPRÉ SCIENCE PAVILION

SECTION 03 41 00 STRUCTURAL PRE-CAST CONCRETE

PART 1 GENERAL

1.01RELATED DOCUMENTS

A.Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

1.02SECTION SUMMARY

A.Project includes:

1.Precast beams to support pre-fabricated greenhouse.

2.Pre-cast stairs and landings.

1.03RELATED SECTIONS

A.Related Sections include the following:

1.Section 05 50 00 – Metal Fabrications; stair handrails.

2.Section 07 92 00 Joint Sealers.

3.Section 13 34 13 – Greenhouses.

1.04SUBMITTALS

A.Product Data: Submit manufacturer's product data with application and installation instructions for proprietary materials and items, including forming accessories, admixtures, joint systems, curing compounds, and others.

B.Design Mixes: Provide for each concrete mix. Include alternate mix designs when characteristics of materials, project conditions, weather, test results, or other circumstances warrant adjustments.

C.Shop Drawings: Submit shop drawings for fabrication, bending and placement of concrete reinforcement. Comply with ACI publication ACI 315 "Details and Detailing of Concrete Reinforcement", showing bar schedules, stirrup spacing, diagrams of bent bars, arrangement

of concrete reinforcement. Include special reinforcement required and openings through concrete structures.

D.Material Certificates: Provide materials certificates in lieu of materials laboratory test reports when permitted by Architect. Material certificates shall be signed by manufacturer and Contractor, certifying that each material item complies with, or exceeds, specified requirements. Include ASTM Certifications.

1.05QUALITY ASSURANCE

A.Casting: Plant cast, per ACI 301 "Specifications for Structural Concrete for Buildings".

B.Standards: ACI 318 Building Code Requirements for Reinforced Concrete, and CRSI Manual of Standard Practice.

  1. Building Code Requirements for Reinforced Concrete; ACI 318-96.
  2. Specifications for Structural Concrete for Buildings; ACI 301-95.
  3. Details and Detailing of Reinforced Concrete, ACI 315-92.
  4. Manual of Standard Practice of the Prestressed Concrete Institute, latest edition.
  5. ACI Detailing Manual SP-66-94.

C.Testing: Independent testing laboratory.

D.Erection Tolerance Limits: PCI MNL 127.

E.Manual for Quality Control for Plants and Production of Precast and Prestressed Concrete Products: PCI MNL-116.

F.Design Handbook- Precast and Prestressed Concrete: PCI MNL-120.

G.Manual on design of Connections for Precast Prestressed Concrete:

PCI MNL-123.

H.PCI Design for Fire Resistance of Precast Prestressed Concrete: PCI MNL 124.

I.Design components to accommodate construction tolerances, deflection of other building structural members and clearances of intended openings.

J.Design precast concrete members in accordance with PCI manual of Design, under direct supervision of a professional structural engineer experienced in design of this work and licensed in the State of Pennsylvania.

PART 2 -PRODUCTS

A.Design Mix:

1.5000 psi, 28 day compressive strength for typical units.

2.3500 psi release strength for prestressed units.

B.Formwork: Plywood or metal panel formwork sufficient for structural and visual requirements.

C.Reinforcing Materials:

1.Reinforcing Bars: ASTM A 615, Grade 60, deformed, Fy = 60ksi.

2.Steel Wire: ASTM A 82.

3.Steel Wire Fabric: ASTM A 185, welded.

4.Supports for Reinforcement for Exposed to View Concrete: CRSI Class 2, stainless steel protected legs.

5.Prestressing strands shall be uncoated 7 wire stress-relieved steel strands conforming to ASTM A-416, grade 270K.

6.Threaded inserts shall be of loop type and shall have a pull-out and shear strength equal to or greater than a "Superior LLT-6 3/4 inch diameter threaded insert.

D.Concrete Materials: ASTM C 150, Type I or Type III, Portland cement; potable water.

1.ASTM C 33, normal weight aggregates.

2.ASTM C 330, light weight aggregates.

E.Concrete Admixtures: Containing less than 0.1 percent chloride ions.

1.AirEntraining Admixture: ASTM C 260.

2.WaterReducing Admixture: ASTM C 494, Type A.

F.Connection Materials:

1.Steel Plate: ASTM A 283, Grade C.

2.Steel Shapes: ASTM A 36.

3.Anchor Bolts: ASTM A 307.

4.High Strength Threaded Fasteners: ASTM A 324.

5.Steel Finish: ASTM A 153 galvanizing for exposed steel; primed for nonexposed steel.

6.Bearing Pads: Elastomeric or TFE to suit bearing stresses.

7.Connecting and Supporting Devices: ASTM A36 carbon steel, conforming to PCI MHL-123 plates, angles, items cast into concrete.

G.Grout:

1.Portland cement, ASTM C 150, Type I; sand, ASTM C 404.

2.3000 psi, 28 day compressive strength.

3.Nonmetallic shrinkageresistant grout, minimum compressive strength of 7,000 psi at 28 days, CE CRDC621.

H.Finish:

1.Formed Surfaces: Commercial finish.

I.Bearing strip: continuous 1/8inch x 2inch neoprene or similar material.

J.Manufactures

1.Flexicore Company Inc., Pittsburgh, PA, 724-258-4450.

2.Sidley Pre-Cast Group, Painesville, OH, (800)-536-9343.

3.Spancrete, Inc. Waukesha, WI,

(414)-290-9000.

PART 3 - EXECUTION

A.Install precast concrete members plumb, level and in alignment within PCI MNL-116/117 specified limits of erection tolerances.

B.Solid precast units shall have a smooth as-cast finish unless otherwise indicated on the drawings. Submit samples for the Architect's approval prior to commencing work.

C.The precast concrete manufacturer shall provide tests and records according to the PCI Manual for Quality Control for all precast items, whether prestressed or not, and shall maintain the necessary records in an orderly manner available for inspection at any time.

G.Provide sufficient bracing to maintain stable, plumb conditions during erection until the structure is stable by virtue of completed connections. If bearing of concrete masonry, provide 1/8" x 2" continuous compressible bearing pads. Install steel shims and plates as required for complete level and plumb execution of the work.

H.Erection Tolerances:

1.Variation in plan:  1/2" for any member at any location.

2.Deviation in plan from straight lines parallel to specified linear building lines:

a)1/40" per foot for adjacent member less than 20 feet apart.

b)1/2" for adjacent members 20 feet or more apart.

3.Deviation from plumb: 1/4" for any 10 feet of height, 1/2" maximum for the entire height.

4.Variation in elevation of bearing surfaces:  1/2" for any member at any location.

5.Variation in specified clearance to an adjacent independent member:  1/4"

6.Job in alignment of matching edges: 1/4"

7.Variation from specified bearing length on support:  3/4"

8.Variation from specified joint width:  1/4"

I.Field cutting is not permitted unless approved by the Architect and indicated on the approved shop drawings.

END OF SECTION

STRUCTURAL PRE-CAST CONCRETE

03 41 00 - 1(45307035)