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3400Tectura Designs Precast Concrete

PART 1 - GENERAL

1.1SUMMARY

  1. Perform all work required to furnish and complete the proper installation ofprecast concrete.
  2. Types of Precast Concrete work include:
  3. Precast Concrete Stairs
  4. Precast Concrete Caps
  5. Precast Concrete Benches
  6. Precast Concrete Copings
  7. Precast Concrete Veneer
  8. Precast Concrete Planters
  9. Precast Concrete ______
  10. Setting material, grouts, sealants and caulks
  11. Installation of precast concrete
  12. Related work not specified under this section
  13. Installation of steel units to receive precast concrete
  14. Installation of Concrete substrate to receive precast concrete

1.2REFERENCES

  1. American Society for Testing and Materials (ASTM)
  2. ASTM C-150ASTM C-260ASTM C-494

ASTM C-128ASTM C-31

  1. Precast Concrete Institute (PCI)

1.3SUBMITTALS

  1. Shop Drawings
  2. Submit fabrication drawings of all precast concrete items showing detailed sections and profile

for all precast items. Details shall show all reinforcing and cast in hardware.

  1. Samples
  2. Submit 1 sample for color and texture approval.
  3. Color to be selected from manufacturersstandard offerings.
  4. Match existing or architect’s sample
  5. Custom Sample Number ______
  6. Submit a copy of manufacturers Quality Assurance and Procedure Manual
  1. Performance Requirements
  2. Compressive Strength 5,000p.s.i. minimum
  3. Air Content 6-8%
  4. Water-Cement Ratio .45
  5. Test Results
  6. Manufacturer shall furnish test results attesting that materials meet specification requirements.

1.4QUALITY ASSURANCE

  1. Comply with PCI Standards.
  2. Precast manufacturing plant shall be certified, category AT – Architectural Trim, at the time of bidding.
  3. Qualifications: Precast Concrete Manufacturer and Trade Contractor must have a minimum of 5years of successful experience on projects of similar magnitude and complexity to the indicated project.
  4. Manufacturer and contractor to be prequalified by Architect prior to bidding and failure todo so will void bid.

1.5DELIVERY, STORAGE, AND HANDLING

  1. Packaging and Shipping: precast concreteto be palletized, shrink wrapped and marked with legible manufacturer identification, including piece number and quantities.
  2. Storage and Protectionprecast concreteto be stored in secure area in original packaging.
  3. Protect from damage by other trades.
  4. Report all damage due to shipment immediately. Customer is required to sign the Bill of Lading slip detailing the damaged product. Picture proof is required.

1.6WARRANTY

  1. Foraperiodoftwo(2)yearsfrom delivery of precast concrete, manufacturer warrantstheprecast concreteproductsagainstdefectsinworkmanshipandmaterialsperindustrystandards.Thiswarrantydoesnotcovertheaboveproductsforcrackingandfaultingcausedbysettlingduetoimproperor faulty substrates or improper installation;nordoesitcoverdamagecausedbyimpact,vandalismornaturaldisaster.

PART 2 – PRODUCTS

2.1MANUFACTURERS

  1. Acceptable Manufacturer:

Tectura Designs, 800-388-8728 Phone: (715) 359-3121 Fax: (715) 355-4627

E-mail: ebsite:

2.2MATERIAL REQUIREMENTS

  1. Portland Cement: ASTM C-150 Specifications for Portland Cement.
  2. Aggregates: Aggregate shall be blended to meet individual project requirements.
  3. Coloring; Pigments used shall be inorganic, resistant to alkalinity and used per manufacturer's

recommendations.

  1. Reinforcement and Hardware:
  2. Reinforce precast with deformed rods asrecommended by precast concrete manufacturer.
  3. Abrasive Inserts: Shall consist of silica sand and epoxy.
  4. Abrasive Color:______
  5. Specify one to three lines.
  6. Setting Materials, Caulks & Sealants
  7. Color(s) to be selected by Architect.
  8. Sealer: Colorless, pure acrylic water repellent sealer. Sealer to maintain natural look of concrete surface with no glaze or gloss, darkening or color change.
  9. Precast manufacturer is not a reseller for any of the above products. Please contact the following supplier for information and recommendations on job specific installation materials:
  10. Acceptable Supplier:

Custom Building Products/AquaMix, 800-272-878

E-mail: Website:

2.3MANUFACTURED UNITS

  1. Sizing Tolerances
  2. All units to conform to shop drawings with a (+/-) 1/8" tolerance in dimension.
  3. Precast Surfaces and Edges:
  4. All exposed edges to have minimum of 1/8" radius to prevent chipping.
  5. All finished surfaces to match approved control sample
  6. All precast concrete finished surfaces to be factory sealed

PART 3 – EXECUTION

3.1INSPECTION

  1. Examine substrates for the following:
  2. Defects or cracks in existing work or substrate.
  3. Deviations beyond allowable tolerances for the substrate.
  4. Continue with installation of precast units only when all defects have been corrected.

3.2 PROJECT CONDITIONS

  1. Do not install products under environmental conditions outside setting material manufacturer's absolute limits.

3.3INSTALLATION

  1. Precast Tread setting methods include
  2. Thin Set Application
  3. Substrateofconcreteorsteel(steelatinteriorapplicationonly). Mustbe withinatoleranceof1/8"inalldimensions.
  4. Latexmodifiedthinsetmortarusedoverconcretesubstrate.118.4
  5. Setting bed must be continuous under the entire length of the tread and behind the entire riser. Setting materials utilized per manufactures recommended instruction.
  6. Epoxythinsetisusedoversteelsubstrate.
  7. Setting bed must be continuous under the entire length of the tread and behind the entire riser. Setting materials utilized permanufactures recommended instruction.
  8. Settreadslevelandplumb tomeetfinishednosinglayout.
  1. Mortar Set Application
  2. Substrateofconcreteorsteel(steelatinteriorapplicationonly). Mustbe withinatoleranceof1/8"inalldimensions.
  3. Theheightofthemortar bedisestablishedbasedontreadnosinglayoutmarks and precast thickness.Themortarbedisthenplacedorscreededoverprimedsubstrate.
  4. Setting bed must be continuous under the entire length of the tread and behind the entire riser. Setting materials utilized per manufactures recommended instruction.
  5. Settreadslevelandplumb tomeetfinishednosinglayout.
  1. Tab Set Application
  2. Substrateofconcreteorsteel(steelatinteriorapplicationonly)mustbewithinatoleranceof1/8"inalldimensions.
  3. Tabstobesetatfrontandbackoftreadevery12" O.C. minimum.
  4. Settreadsleveland plumbtoestablishednosinglayout.
  1. Precast Concrete products setting orinstallation methods are to be reviewed by the manufacturer and setting materials supplier.
  1. Caulking of Precast
  2. Cleanall jointsthoroughly,removingalldebris.
  3. Wipeall jointswithcaulkmanufacturer'srecommendedcleanerpriortoapplication.
  4. Useurethanecaulk.(Colormatchcaulkto precastperarchitectselection.)
  5. Cleanupaftercaulkingaspercaulkmanufacturer'srecommendations.
  1. Final Cleaning of Precast Concrete
  2. Checkallsurfacesandcaulking,makerepairsas necessary.
  3. CleantreadswithapHbalancedsoap.
  1. Protection:
  2. Upon completion, the work shall be ready for final inspection and acceptance byowner or owner’s agent.
  3. General Contractor shall protect the finished work from the time the installingcontractor completes the work.
  4. Finish:
  5. Overall match to approved sample and per industry standards.
  6. All products to be factory sealed.

PART 4 – CARE AND MAINTENANCE

4.1

  1. Cleaning
  2. Topreserve theappearanceandextendthelifeofthePrecast Concrete cleaning and maintenance processes must be in place. Whenusingthe followingprocedures,pleasefollowtheproductmanufacturer'sinstructionsregardingtheuseofanyequipmentorcleaningmaterialsdescribedhere.
  3. Powersweep,thenpressurewashprecastsurface.Spotcleananystainedareas.
  4. Spotcleananystainedareas by using aneutral,non-aggressivecleaner.This may requireefforttoremovesomeofthetoughermarks or stains.
  5. Exampleofoff-the-shelfcleaners: Citruscleaner,SimpleGreen
  6. Always startwiththemostneutralcleanerandworkyourwaytowardthemoreaggressivecleaners.
  7. Inextremecases,contact Tectura Designs to discuss options
  8. Besuretouseplastic,rubberornylontipequipment;thiswillhelppreventscratchesontheconcrete.
  9. Precast Concreteisbuilttowithstand aggressivecleaning.However,themoreaggressivethe cleaner,themoreriskisinvolved. Strictadherencetoallproductwarningsissuggested.
  10. Inallcasesaftercleaningand/orpatching,itisrecommendedthatthePrecastberesealed.Thiswillhelpprotecttheproductfromenvironmental effects.Contactmanufacturertoobtainsealerandstain information based on specific job.
  1. Maintenance
  2. Annual maintenance is recommended,however, incasesofextremeuse,thebesttimeforapplicationiswhentheappearanceoftheproductisshowingwearorisappearingdull.
  3. Checktheprecastforbrokenandchippedpieces.If damaged, contact manufacturer before repairing to order a patch kit and obtain patching procedures.
  4. De-icingsaltscandamageconcrete, causingthemtoscaleorbreakapart. If necessarythesechemicalsshould beusedsparinglyandwithcautiononourconcreteproducts.
  5. Salt based products are not recommended
  6. De-icersshouldbeusedonlywhennecessarytohelploosensnowandice,andmakeremovaleasier. Neverover-applyde-icingproducts.Mixthedeicerswithsandtoincreasetheireffectivenessandreduceoveralluse.
  7. Alwaysreadand followlabeldirectionswhenapplyingde-icingmaterials.
  8. Calcium magnesium acetate chloride tends to cause the least amount of damage to Precast Concrete
  9. Other manufacturer’s products used in conjunction with the Precast Concrete may require additional maintenance.Including but not limited to: Wood, Metals,Plastics, etc. Contact product specific manufactures for their maintenancerequirements.

Rev_1 Updated: June2018

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