515-18-109 Bid Specifications_Part3.pdf

Renovate Outpatient Pharmacy and February 14, 2020

Urgent Care, Bldg. 2 100% Bid Documents

Battle Creek, MI 07-01-19

VA Project No. 515-18-109

03 30 00 - 25 flatness using a 3000 mm (10 foot) highway straightedge. Correct high spots by cutting down and correct low spots by filling in with material of same composition as floor finish. Remove any surface projections and re-float to a uniform texture.

7. Steel Trowel Finish: Concrete surfaces to receive resilient floor covering or carpet, monolithic floor slabs to be exposed to view in finished work, future floor roof slabs, applied toppings, and other interior surfaces for which no other finish is indicated. Steel trowel immediately following floating. During final troweling, tilt steel trowel at a slight angle and exert heavy pressure to compact cement paste and form a dense, smooth surface. Finished surface shall be smooth, free of trowel marks, and uniform in texture and appearance.

8. Broom Finish: Finish exterior slabs, ramps, and stair treads with a bristle brush moistened with clear water after surfaces have been floated. Brush in a direction transverse to main traffic. Match texture approved by COR from sample panel.

9. Finished slab flatness (FF) and levelness (FL) values comply with the following minimum requirements:

a. Areas covered with carpeting, or not specified otherwise in b.

below:

1) Slab on Grade:

a) Specified overall value FF 25/FL 20

b) Minimum local value FF 17/FL 15

2) Unshored suspended slabs:

a) Specified overall value FF 25

b) Minimum local value FF 17

3) Level tolerance such that 80 percent of all points fall within a 20 mm (3/4 inch) envelope +10 mm, -10 mm (+3/8 inch, -3/8 inch) from the design elevation.

b. Areas that will be exposed, receive thin-set tile or resilient flooring, or roof areas designed as future floors:

1) Slab on grade:

a) Specified overall value FF 36/FL 20

b) Minimum local value FF 24/FL 15

3) Unshored suspended slabs:

a) Specified overall value FF 30

Battle Creek, MI 07-01-19

VA Project No. 515-18-109

03 30 00 - 26

b) Minimum local value FF 24

4) Level tolerance such that 80 percent of all points fall within a 20 mm (3/4 inch) envelope +10 mm, -10 mm (+3/8 inch, -3/8 inch) from the design elevation.

c. "Specified overall value" is based on the composite of all measured values in a placement derived in accordance with ASTM

E1155.

d. "Minimum local value" (MLV) describes the flatness or levelness below which repair or replacement is required. MLV is based on the results of an individual placement and applies to a minimum local area. Minimum local area boundaries may not cross a construction joint or expansion joint. A minimum local area will be bounded by construction and/or control joints, or by column lines and/or half-column lines, whichever is smaller.

10. Measurements

a. General Contractor retained testing laboratory will take measurements as directed by COR, to verify compliance with FF, FL, and other finish requirements. Measurements will occur within

72 hours after completion of concrete placement (weekends and holidays excluded). Make measurements before shores or forms are removed to insure the "as-built" levelness is accurately assessed. Profile data for above characteristics may be collected using a laser level or any Type II apparatus (ASTM E1155, "profileograph" or "dipstick"). Contractor's surveyor shall establish reference elevations to be used by Department of

Veterans Affairs retained testing laboratory.

b. Contractor not experienced in using FF and FL criteria is encouraged to retain the services of a floor consultant to assist with recommendations concerning adjustments to slab thicknesses, finishing techniques, and procedures on measurements of the finish as it progresses in order to achieve the specific flatness and levelness numbers.

11. Acceptance/ Rejection:

a. If individual slab section measures less than either of specified minimum local FF/FL numbers, that section shall be rejected and remedial measures shall be required. Sectional boundaries may be

Battle Creek, MI 07-01-19

VA Project No. 515-18-109

03 30 00 - 27 set at construction and contraction (control) joints, and not smaller than one-half bay.

b. If composite value of entire slab installation, combination of all local results, measures less than either of specified overall

FF/FL numbers, then whole slab shall be rejected and remedial measures shall be required.

12. Remedial Measures for Rejected Slabs: Correct rejected slab areas by grinding, planing, surface repair with underlayment compound or repair topping, retopping, or removal and replacement of entire rejected slab areas, as directed by COR, until a slab finish constructed within specified tolerances is accepted.

3.14 SURFACE TREATMENTS:

A. Use on exposed concrete floors and concrete floors to receive carpeting.

B. Liquid Densifier/Sealer: Apply in accordance with manufacturer's directions just prior to completion of construction.

C. Non-Slip Finish: Except where safety nosing and tread coverings are shown, apply non-slip abrasive aggregate to treads and platforms of concrete steps and stairs, and to surfaces of exterior concrete ramps and platforms. Broadcast aggregate uniformly over concrete surface at rate of application of 8% per 1/10th m2 (7.5 percent per square foot) of area. Trowel concrete surface to smooth dense finish. After curing, rub treated surface with abrasive brick and water to slightly expose abrasive aggregate.

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Renovate Outpatient Pharmacy and March 20, 2020

Battle Creek, MI 10-01-1 7 VA Project No. 515-18-109

04 05 13 - 1

SECTION 04 05 13

MASONRY MORTARING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Masonry mortar installed by other concrete and maso nry sections.

1.2 RELATED REQUIREMENTS

A. Mortar used in Section:

1. Section 04 05 16, MASONRY GROUTING.

2. Section 04 20 00, UNIT MASONRY.

B. Mortar Color: Section 09 06 00, SCHEDULE FOR FINISH ES.

1.3 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this section.

B. ASTM International (ASTM):

1. C40/C40M-11 - Organic Impurities in Fine Aggregates for Concrete.

2. C91/C91M-12 - Masonry Cement.

3. C144-11 -Aggregate for Masonry Mortar.

4. C150/C150M-15 - Portland Cement.

5. C207-06(2011) - Hydrated Lime for Masonry Purposes.

6. C270-14a - Mortar of Unit Masonry.

7. C595/C595M-15e1 - Blended Hydraulic Cements.

8. C780-15 - Preconstruction and Construction Evaluati on of Mortars for

Plain and Reinforced Unit Masonry.

9. C979/C979M-10 - Pigments for Integrally Colored Con crete.

10. C1329/C1329M-15 - Mortar Cement.

1.4 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWIN GS, PRODUCT DATA, AND SAMPLES.

B. Manufacturer's Literature and Data:

1. Description of each product.

C. Test Reports: Certify each product complies with sp ecifications.

1. Mortar.

2. Admixtures.

D. Certificates: Certify each product complies with sp ecifications.

04 05 13 - 2

1. Portland cement.

2. Masonry cement.

3. Mortar cement.

4. Hydrated lime.

5. Fine aggregate.

6. Color admixture.

E. Qualifications: Substantiate qualifications comply with specifications.

1. Testing laboratory.

1.5 QUALITY ASSURANCE

A. Preconstruction Testing:

1. Engage independent testing laboratory to tests and submit reports.

a. Deliver samples to laboratory in number and quantit y required for testing.

2. Test mortar and materials specified.

3. Mortar:

a. Test for compressive strength and water retention a ccording to

ASTM C270.

b. Minimum Mortar compressive strengths 28 days:

1) Type S: 12.4 MPa (1,800 psi).

2) Type N: 5.1 MPa (750 psi).

4. Non Staining Cement: Test for water soluble alkali.

a. Water Soluble Alkali: Maximum 0.03 percent.

5. Sand: Test for deleterious substances, organic impu rities, soundness and grading.

1.6 DELIVERY

A. Deliver products in manufacturer's original sealed packaging.

B. Mark packaging, legibly. Indicate manufacturer's na me or brand, type, production run number, and manufacture date.

C. Before installation, return or dispose of products within distorted, damaged, or opened packaging.

1.7 STORAGE AND HANDLING

A. Store masonry materials under waterproof covers on planking clear of ground.

1. Protect loose, bulk materials from contamination.

04 05 13 - 3

B. Protect products from damage during handling and co nstruction operations.

1.8 WARRANTY

A. Construction Warranty: FAR clause 52.246-21, "Warra nty of

Construction."

PART 2 - PRODUCTS

2.1 MATERIALS

A. Hydrated Lime: ASTM C207, Type S.

B. Aggregate for Masonry Mortar: ASTM C144 and as foll ows:

1. Light colored sand for mortar for laying face brick .

2. White plastering sand meeting sieve analysis for mo rtar joints for pointing except that 100 percent passes No. 8 sieve , and maximum 5 percent retained on No. 16 sieve.

3. Test sand for color value according to ASTM C40/C40 M. Sand producing color darker than specified standard is unacceptabl e.

C. Blended Hydraulic Cement: ASTM C595/C595M, Type IS, IP.

D. Masonry Cement: ASTM C91/C91M. Type N, S.

1. Use white masonry cement whenever white mortar is s pecified.

E. Mortar Cement: ASTM C1329/C1329M, Type N, S.

F. Portland Cement: ASTM C150/C150M, Type I.

1. Use white Portland cement wherever white mortar is specified.

G. Pigments: ASTM C979/C979M; inorganic, inert, minera l pigments only, unaffected by atmospheric conditions, nonfading, al kali resistant, and water insoluble.

H. Water: Potable, free of substances that are detrime ntal to mortar, masonry, and metal.

2.2 PRODUCTS - GENERAL

A. Basis of Design: Section 09 06 00, SCHEDULE FOR FIN ISHES.

B. Provide each product from one manufacturer

2.3 MIXES

A. Pointing Mortar for New Work:

1. For Cast Stone or Precast Concrete: Proportion by v olume; one part white Portland cement, two parts white sand, and 1/ 5 part hydrated lime.

04 05 13 - 4

2. Pointing Mortar for Glazed Structural Facing Tile:

a. Proportion by volume: One part white Portland cemen t, two parts of graded white sand passing Number 50 sieve, and 1 /8 part hydrated lime.

B. Masonry Mortar: ASTM C270.

1. Admixtures:

a. Do not use mortar admixtures, and color admixtures unless approved by Contracting Officer's Representative.

b. Do not use antifreeze compounds.

C. Colored Mortar:

1. Maintain uniform mortar color for exposed work, thr oughout.

2. Match mortar color in approved sample

3. Alteration Work Mortar Color: Match existing mortar unless specified otherwise in Section 09 06 00, SCHEDULE FOR FINISHE S.

D. Color Admixtures:

1. Proportion as specified by manufacturer.

2. For color, see Section 09 06 00, SCHEDULE FOR FINIS HES.

PART 3 - EXECUTION

3.1 PREPARATION

A. Examine and verify substrate suitability for produc t installation.

B. Protect existing construction and completed work fr om damage.

3.2 MIXING

A. Measure ingredients by volume using known capacity container.

B. Mix for 3 to 5 minutes in a mechanically operated m ortar mixer.

C. Mix water with dry ingredients in sufficient amount to provide a workable mixture which will adhere to vertical surf aces of masonry units.

D. Mortar Stiffened Because of Water Loss Through Evap oration:

1. Re-temper by adding water to restore to proper cons istency and workability.

2. Discard mortar reaching initial set or unused withi n two hours of mixing.

E. Pointing Mortar:

04 05 13 - 5

1. Mix dry ingredients with enough water to produce da mp mixture of workable consistency retaining shape when formed in to ball.

2. Allow mortar to stand in dampened condition for 60 to 90 minutes.

3. Add water to bring mortar to a workable consistency before use.

3.3 MORTARING

A. Type S Mortar: Use for masonry containing vertical reinforcing bars

(non-engineered) and engineered reinforced unit mas onry work.

B. Brick Veneer Over Frame Back Up Walls: Use Type S P ortland cement-lime mortar.

C. Type N Mortar: Use for other masonry work.

D. Type N Mortar: Use for pointing items and tuck poin ting specified.

3.4 FIELD QUALITY CONTROL

A. Field Tests: Performed by testing laboratory specif ied in Section

01 45 29, TESTING LABORATORY SERVICES.

1. Take and test samples during progress of work accor ding to

ASTM C780.

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Battle Creek, MI 02-01-1 6

04 05 16 - 1

SECTION 04 05 16

MASONRY GROUTING

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Grout for filling hollow concrete masonry cores.

1.2 RELATED REQUIREMENTS

A. Grout used in Section:

1. Section 04 20 00, UNIT MASONRY.

2. Section 04 72 00, CAST STONE MASONRY.

B. Grout Color: Section 09 06 00, SCHEDULE FOR FINISHE S.

C. Section 09 91 00, PAINTING.

1.3 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this section.

B. American National Standards Institute (ANSI):

1. A118.6-10 - Standard Cement Grouts for Tile Install ation.

C. ASTM International (ASTM):

1. C40/C40M-11 - Organic Impurities in Fine Aggregates for Concrete.

2. C150/C150M-15 - Portland Cement.

3. C207-06(2011) - Hydrated Lime for Masonry Purposes.

4. C404-11 - Aggregates for Masonry Grout.

5. C476-11 - Grout for Masonry.

6. C595/C595M-15e1 - Blended Hydraulic Cement.

7. C979/C979M-10 - Pigments for Integrally Colored Con crete.

8. C1019-14 - Sampling and Testing Grout.

1.4 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWIN GS, PRODUCT DATA, AND SAMPLES.

B. Manufacturer's Literature and Data:

1. Description of each product.

C. Sustainable Construction Submittals:

1. Recycled Content: Identify pre-consumer recycled co ntent percentage by weight.

D. Test Reports: Certify each product complies with sp ecifications.

04 05 16 - 2

1. Grout, each type.

2. Cement.

3. Aggregate.

E. Certificates: Certify each product complies with sp ecifications.

1. Blended hydraulic cement.

2. Portland cement.

3. Grout.

4. Hydrated lime.

5. Aggregate.

6. Color admixture.

1.5 QUALITY ASSURANCE

A. Preconstruction Testing:

1. Engage independent testing laboratory to perform te sts and submit reports.

a. Deliver samples to laboratory in number and quantit y required for testing.

2. Grout:

a. Test compressive strength according to ASTM C1019 s tandard.

3. Cement:

a. Test for water soluble alkali (nonstaining) when no nstaining cement is specified.

b. Nonstaining cement containing more than 0.03 percen t water soluble alkali.

4. Aggregate:

a. Test for deleterious substances, organic impurities , soundness and grading.

1.6 DELIVERY

A. Deliver products in manufacturer's original sealed packaging.

B. Mark packaging, legibly. Indicate manufacturer's na me or brand, type, production run number, and manufacture date.

1.7 STORAGE AND HANDLING

A. Store masonry materials under waterproof covers on planking clear of ground, and protect damage from handling, dirt, sta in, water and wind.

operations.

04 05 16 - 3

1.8 WARRANTY

A. Construction Warranty: FAR clause 52.246-21, "Warra nty of

Construction."

PART 2 - PRODUCTS

2.1 MATERIALS

A. Grout Components:

1. Hydrated Lime: ASTM C207, Type S.

2. Aggregate For Masonry Grout: ASTM C404, Size 8.

3. Blended Hydraulic Cement: ASTM C595, Type IS, IP.

4. Portland Cement: ASTM C150, Type I.

5. Liquid Acrylic Resin:

a. A formulation of acrylic polymers and modifiers in liquid form designed for use as an additive for mortar to impro ve physical properties.

6. Water: Potable, free of substances that are detrime ntal to grout, masonry, and metal.

2.2 PRODUCTS - GENERAL

A. Provide each product from one manufacturer.

2.3 MIXES

A. Grout: ASTM C476; fine grout and coarse grout.

1. Color Admixture:

a. Pigments: ASTM C979, inert, stable to atmospheric c onditions, nonfading, alkali resistant, and water insoluble.

b. Use mineral pigments only. Organic pigments are not acceptable.

B. Ready-Mixed Grout: ANSI A118.8.

PART 3 - EXECUTION

3.1 PREPARATION

A. Examine and verify substrate suitability for produc t installation.

B. Protect existing construction and completed work fr om damage.

C. Clean mortar from masonry cells protruding more tha n 13 mm (1/2 inch) to permit grout flow.

D. Remove debris from grout spaces.

E. Verify reinforcement is correctly placed before pla cing grout.

04 05 16 - 4

3.2 MIXING

A. Mix grout in mechanically operated mixer.

1. Mix grout for five minutes, minimum.

B. Measure ingredients by volume using container of kn own capacity.

C. Mix water with grout dry ingredients.

1. Slump Range: 200 to 275 mm (8 to 11 inches).

3.3 GROUTING

A. Install grout according to Section 04 20 00, UNIT M ASONRY.

B. Use fine grout for filling wall cavities and hollow concrete masonry units where smallest cell dimension is 50 mm (2 inc hes) or less.

C. Use either fine grout or coarse grout for filling w all cavities and hollow concrete masonry units where smallest cell d imension is greater than 50 mm (2 inches).

D. Use grout for filling bond beam or lintel units.

Battle Creek, MI 08-01-1 7

04 20 00 - 1

SECTION 04 20 00

UNIT MASONRY

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes: Concrete masonry unit (CMU) assem blies for:

1. Exterior walls.

2. Interior walls and partitions.

1.2 RELATED REQUIREMENTS

A. Sealants and Sealant Installation: Section 07 92 00 , JOINT SEALANTS.

B. Color and Texture of Masonry Units: Section 09 06 0 0, SCHEDULE FOR

FINISHES.

1.3 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this section.

B. American Concrete Institute (ACI):

1. 315-99 - Details and Detailing of Concrete Reinforc ement.

2. 530.1/ASCE 6/TMS 602-13 - Specification for Masonry Structures.

C. ASTM International (ASTM):

1. A615/A615M-15ae1 - Deformed and Plain Carbon-Steel Bars for Concrete

Reinforcement.

2. A951/A951M-14 - Steel Wire for Masonry Joint Reinfo rcement.

3. A1064/A1064M-15 - Carbon-Steel Wire and Welded Wire Reinforcement, Plain and Deformed, for Concrete.

4. C34-13 - Structural Clay Load-Bearing Wall tile.

5. C55-14a - Concrete Building Brick.

6. C56-13 - Structural Clay Nonloadbearing Tile.

7. C62-13a - Building Brick (Solid Masonry Units Made from Clay or

Shale).

8. C67-14 - Sampling and Testing Brick and Structural Clay Tile.

9. C90-14 - Load-Bearing Concrete Masonry Units.

10. C126-15 - Ceramic Glazed Structural Clay Facing Til e, Facing Brick, and Solid Masonry Units.

11. C216-15 - Facing Brick (Solid Masonry Units Made fr om Clay or

Shale).

12. C612-14 - Mineral Fiber Block and Board Thermal Ins ulation.

13. C744-14 - Prefaced Concrete and Calcium Silicate Ma sonry Units.

04 20 00 - 2

14. D1056-14 - Flexible Cellular Materials - Sponge or Expanded Rubber.

15. D2240-05(2010) - Rubber Property-Durometer Hardness .

16. F1667-15 - Driven Fasteners: Nails, Spikes, and Sta ples.

D. American Welding Society (AWS):

1. D1.4/D1.4M-11 - Structural Welding Code - Reinforci ng Steel.

E. Brick Industry Association (BIA):

1. TN 11B-88 - Guide Specifications for Brick Masonry, Part 3.

F. Federal Specifications (Fed. Spec.):

1. FF-S-107C(2) - Screws, Tapping and Drive.

1.4 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWIN GS, PRODUCT DATA, AND SAMPLES.

B. Submittal Drawings:

1. Fabrication, bending, and placement of reinforcing bars. Comply with

ACI 315. Show bar schedules, diagrams of bent bars, stirrup spacing, lateral ties and other arrangements and assemblies.

2. Special masonry shapes, profiles, and placement.

3. Masonry units for typical window and door openings, and, for special conditions as affected by structural conditions.

C. Manufacturer's Literature and Data:

1. Description of each product.

2. Installation instructions.

D. Samples:

1. Face brick: Sample panel, 200 mm by 400 mm (8 inche s by 16 inches,) showing full color range and texture of bricks, bon d, and proposed mortar joints.

2. Ceramic Glazed Facing Brick: Sample panel, 200 mm b y 400 mm (8 inches by 16 inches,) showing full color range and texture of bricks, bond, and proposed mortar joints.

3. Concrete masonry units, when exposed in finish work .

4. Anchors and Ties: Each type.

5. Joint Reinforcing: 1200 mm (48 inches) long each ty pe.

6. Glazed Structural Facing Tile: Clipped panels (trip licate) of four wall units with base units, showing color range, ea ch color and texture.

04 20 00 - 3

E. Sustainable Construction Submittals:

1. Recycled Content: Identify post-consumer and pre-co nsumer recycled content percentage by weight.

F. Test reports: Certify products comply with specific ations.

1. Ceramic glazed facing brick.

G. Certificates: Certify products comply with specific ations.

1. Face brick.

2. Solid and load-bearing concrete masonry units, incl uding fire-resistant rated units.

3. Ceramic glazed facing brick.

4. Glazed structural clay facing tile.

5. Structural clay tile units.

H. Delegated Design Drawings and Calculations: Signed and sealed by responsible design professional.

1.5 QUALITY ASSURANCE

A. Welders and Welding Procedures Qualifications: AWS D1.4/D1.4M.

B. Mockups:

1. Before starting masonry, build a mockup panel minim um 1800 mm by

1800 mm (6 feet by 6 feet) with 600 mm (24 inch) 90 degree return for outside corner.

a. Use masonry units from random cubes of units delive red on site.

b. Include structural backup, reinforcing, ties, and a nchors.

2. Mockup panel approved by Contracting Officer's Repr esentative set workmanship and aesthetic quality for masonry work.

3. Clean sample panel to test cleaning methods.

4. Remove mockup panel when directed by Contracting Of ficer's

Representative.

1.6 DELIVERY

A. Deliver products in manufacturer's original sealed packaging.

B. Mark packaging, legibly. Indicate manufacturer's na me or brand, type, production run number, and manufacture date.

C. Before installation, return or dispose of products within distorted, damaged, or opened packaging.

1.7 STORAGE AND HANDLING

A. Store products above grade, protected from contamin ation.

04 20 00 - 4 operations.

1.8 FIELD CONDITIONS

A. Hot and Cold Weather Requirements: Comply with

ACI 530.1/ASCE 6/TMS 602.

1.9 WARRANTY

A. Construction Warranty: FAR clause 52.246-21, "Warra nty of

Construction."

PART 2 - PRODUCTS

2.1 SYSTEM PERFORMANCE

A. Delegated Design: Prepare submittal documents inclu ding design calculations and drawings signed and sealed by regi stered design professional, licensed in state where work is locat ed.

2.2 PRODUCTS - GENERAL

A. Basis of Design: Section 09 06 00, SCHEDULE FOR FIN ISHES.

B. Provide each product from one manufacturer.

1. Steel Recycled Content: 30 percent total recycled c ontent, minimum.

2.3 UNIT MASONRY PRODUCTS

A. Brick:

1. Face Brick:

a. ASTM C216, Grade SW, Type FBS.

b. Brick when tested according to ASTM C67: Classified slightly efflorescent or better.

c. Size:

1) Modular.

2) Thin Brick: 13 mm (1/2 inch) thick with angle shape s for corners.

2. Building Brick: ASTM C62, Grade MW for backup and i nterior work;

Grade SW where in contact with earth.

3. Ceramic Glazed Facing Brick: ASTM C126.

4. One Face Exposed: Grade S, Type I.

5. Two Faces Exposed: Grade S, Type II.

B. Concrete Masonry Units (CMU):

04 20 00 - 5

1. Hollow and Solid Load-Bearing Concrete Masonry Unit s: ASTM C90.

a. Unit Weight: Normal weight

b. Fire rated units for fire rated partitions.

2. Sizes: Modular, 200 mm by 400 mm (8 inches by 16 in ches) nominal face dimension; thickness as indicated on drawings.

3. For molded faces used as a finished surface, use co ncrete masonry units with uniform fine to medium surface texture u nless specified otherwise.

4. Use bullnose concrete masonry units at corners expo sed in finished work with 25 mm (1 inch) minimum radius rounded ver tical exterior corners (bullnose units).

5. Customized Units:

a. Sound-Absorbing Units:

1) Vertical slots in face to core areas.

2) Acoustical absorption insert: Mineral fiber and met al septum, providing unit with NRC rating of 0.70.

b. Split-Face Units:

1) Split-Rib Units: Rib shapes as indicated on drawing s on exposed faces.

2) Ground Face Units: finish on exposed faces.

c. Glazed Face Units: Facing conform to ASTM C744.

C. Concrete Brick: ASTM C55.

D. Clay Tile Units:

1. Glazed Structural Facing Tile:

a. ASTM C126, Grade S, Type I (single faced units) and Type II

(two-faced units).

2. Size: 8W, thickness as shown.

E. Structural Clay Load-Bearing Wall Tile: ASTM C34, G rade LBX

F. Structural Clay Non-Load-Bearing Tile: ASTM C56, Gr ade NB.

G. Use keyed surface structural clay tile units requir ed to receive plaster or mortar.

2.4 ANCHORS, TIES, AND REINFORCEMENT

A. Steel Reinforcing Bars: ASTM A615/A615M; Grade 60, deformed bars.

B. Joint Reinforcement:

1. Form from wire complying with ASTM A951/A951M.

04 20 00 - 6

2. Hot dipped galvanized after fabrication.

3. Width of joint reinforcement 40 mm (1.6 inches) les s than nominal thickness of masonry wall or partition.

4. Cross wires welded to longitudinal wires.

5. Joint reinforcement minimum 3000 mm (10 feet) long, factory cut.

6. Joint reinforcement with crimp formed drip is not a cceptable.

7. Maximum spacing of cross wires 400 mm (16 inch) to longitudinal wires.

8. Ladder Design:

a. Longitudinal wires deformed 4 mm (0.16 inch)

b. Cross wires 2.6 mm (0.10 inch)

9. Trussed Design:

a. Longitudinal and cross wires minimum 4 mm (0.16-inc h nominal) diameter.

b. Longitudinal wires deformed.

10. Multiple Wythes and Cavity Wall Ties:

a. Longitudinal wires 4 mm (0.16 inch), two in each wy the with ladder truss wires 4 mm (0.16 inch) overlay, welded to each longitudinal wire.

b. Longitudinal wires 4 mm (0.16 inch) with U shape 4 mm

(0.16 inch) rectangular ties extending into other w ythe minimum

75 mm (3 inches) spaced 400 mm on center (16 inches ). Adjustable type with U shape tie designed to receive 4 mm (0.1 6 inch) pintle projecting into other wythe 75 mm (3 inches min.).

C. Adjustable Veneer Anchor for Framed Walls:

1. Two-piece, adjustable anchor and tie.

2. Anchor and tie may be either loop or angle type; pr ovide only one type throughout.

3. Loop Type:

a. Anchor: Screw-on galvanized steel anchor strap 2.75 mm

(0.11 inch) by 19 mm (3/4 inch) wide by 225 mm (9 i nches) long, with 9 mm (0.35 inch) offset and 100 mm (4 inch) ad justment.

Provide 5 mm (0.20 inch) hole at each end for faste ners.

b. Ties: Triangular tie, fabricated of 5 mm (0.20 inch ) diameter galvanized cold drawn steel wire. Ties long enough to engage

04 20 00 - 7 anchor and be embedded minimum 50 mm (2 inches) int o bed joint of masonry veneer.

4. Angle Type:

a. Anchor: Minimum 2 mm (16 gage) thick galvanized ste el angle shaped anchor strap. Provide hole in vertical leg f or fastener.

Provide hole near end of outstanding leg to suit up standing portion of tie.

b. Tie: Fabricate from 5 mm (0.20 inch) diameter galva nized cold drawn steel wire. Form "L" shape to be embedded min imum 50 mm

(2 inches) into the bed joint of masonry veneer and provide upstanding leg to fit through hole in anchor and be long enough to allow 50 mm (2 inches) of vertical adjustment.

D. Dovetail Anchors:

1. Corrugated steel dovetail anchors formed of 1.5 mm (0.06 inch) thick by 25 mm (1 inch) wide galvanized steel, 90 mm (3-1 /2 inches) long where used to anchor 100 mm (4 inch) nominal thick masonry units, 140 mm (5-1/2 inches) long for masonry units more t han 100 mm

(4 inches) thick.

2. Triangular wire dovetail anchor 100 mm (4 inch) wid e formed of 4 mm

(9 gage) steel wire with galvanized steel dovetail insert. Anchor length to extend minimum 75 mm (3 inches) into maso nry, 25 mm

(1 inch) into 40 mm (1-1/2 inch) thick units.

3. Form dovetail anchor slots from 0.6 mm (0.02 inch) thick galvanized steel (with felt or fiber filler).

E. Individual Ties:

1. Rectangular ties: Form from 5 mm (3/16 inch) diamet er galvanized steel rod to rectangular shape minimum 50 mm (2 inc hes) wide by sufficient length for ends of ties to extend within 25 mm (1 inch) of each face of wall. Ties that are crimped to form drip are not acceptable.

2. Adjustable Cavity Wall Ties:

a. Adjustable wall ties may be furnished at Contractor 's option.

b. Two-piece type permitting up to 40 mm (1-1/2 inch) adjustment.

c. Form ties from 5 mm (3/16 inch) diameter galvanized steel wire.

d. Form one piece to rectangular shape 105 mm (4-1/8 i nches) wide by length required to extend into bed joint 50 mm ( 2 inches).

04 20 00 - 8

e. Form other piece to 75 mm (3 inch) long by 75 mm (3 inch) wide shape, having 75 mm (3 inch) long bent section for engaging

105 mm (4-1/8 inch) wide piece to form adjustable c onnection.

F. Wall Ties, (Mesh or Wire):

1. Mesh wall ties formed of ASTM A1064/A1064M, W0.5, 2 mm, (0.08 inch) galvanized steel wire 13 mm by 13 mm (1/2 inch by 1 /2 inch) mesh, 75 mm (3 inches) wide by 200 mm (8 inches) long.

2. Rectangular wire wall ties formed of W1.4, 3 mm, (0 .12 inch) galvanized steel wire 50 mm (2 inches) wide by 200 mm (8 inches) long.

G. Corrugated Wall Tie:

1. Form from 1.5 mm (0.06 inch) thick corrugated, galv anized steel

30 mm (1-1/4 inches) wide by lengths to extend mini mum 100 mm

(4 inches) into joints of masonry plus 38 mm (1-1/2 inch) turn-up.

2. Provide 5 mm (3/16 inch) hole in turn-up for fasten er attachment.

H. Adjustable Steel Column Anchor:

1. Two-piece anchor consisting of a 6 mm (1/4 inch) di ameter steel rod to be welded to steel with offset ends, rod to perm it 100 mm

(4 inch) vertical adjustment of wire anchor.

2. Triangular shaped wire anchor 100 mm (4 inches) wid e formed from 5

(3/16 inch) diameter galvanized wire, to extend min imum 75 mm

(3 inches) into joints of masonry.

I. Adjustable Steel Beam Anchor:

1. Z or C type steel strap, 30 mm (1 1/4 inches) wide, 3 mm (1/8 inch) thick.

2. Flange hook minimum 38 mm (1 1/2 inches) long.

3. Length to embed in masonry minimum 50 mm (2 inches) in 100 mm

(4 inch) nominal thick masonry and 100 mm (4 inches ) in thicker masonry.

4. Bend masonry end minimum 40 mm (1 1/2 inches).

J. Ridge Wall Anchors:

1. Form from galvanized steel minimum 25 mm (1 inch) w ide by 5 mm

(3/16 inch) thick by 600 mm (24 inches) long, plus 50 mm (2 inch) bends.

2. Other lengths as indicated on drawings.

04 20 00 - 9

2.5 ACCESSORIES

A. Shear Keys:

1. Solid extruded cross-shaped section of rubber, neop rene, or polyvinyl chloride, with durometer hardness of appr oximately 80 when tested according to ASTM D2240, and minimum shear s trength of

3.5 MPa (500 psi).

2. Shear Key Dimensions: Nominal 70 mm by 8 mm for lon g flange and 38 mm by 16 mm for short flange (2-3/4 inches by 5/16 inch for long flange, and 1-1/2 inches by 5/8 inch for short flan ge).

B. Weeps:

1. Weep Hole Wicks: Glass fiber ropes, 10 mm (3/8 inch ) minimum diameter, 300 mm (12 inches) long.

2. Weep Tubing: Round, polyethylene, 9 mm (3/8 inch) d iameter, 100 mm

(4 inches) long.

3. Weep Hole: Flexible PVC louvered configuration with rectangular closure strip at top.

C. Cavity Drain Material: Open mesh polyester sheets o r strips to prevent mortar droppings from clogging the cavity.

D. Preformed Compressible Joint Filler:

1. Thickness and depth to fill joint.

2. Closed Cell Neoprene: ASTM D1056, Type 2, Class A, Grade 1, B2F1.

3. Non-Combustible Type: ASTM C612, Type 5, Max. Temp. 1800 degrees F.

E. Box Board:

1. Mineral Fiber Board: ASTM C612, Type 1.

2. 25 mm (1 inch) thickness.

3. Other spacing material having similar characteristi cs is acceptable subject to Contracting Officer's Representative's a pproval.

F. Masonry Cleaner:

1. Detergent type cleaner selected for each type mason ry.

2. Acid cleaners are not acceptable.

3. Use soapless type specially prepared for cleaning b rick or concrete masonry as appropriate.

G. Fasteners:

1. Concrete Nails: ASTM F1667, Type I, Style 11, 19 mm (3/4 inch) minimum length.

04 20 00 - 10

2. Masonry Nails: ASTM F1667, Type I, Style 17, 19 mm (3/4 inch) minimum length.

3. Screws: FS-FF-S-107, Type A, AB, SF thread forming or cutting.

H. Welding Materials: AWS D1.4/D1.4M, type to suit app lication.

PART 3 - EXECUTION

3.1 INSTALLATION - GENERAL

A. Install products according to manufacturer's instru ctions

1. When manufacturer's instructions deviate from speci fications, submit proposed resolution for Contracting Officer's Repre sentative consideration.

B. Keep finish work free from mortar smears or spatter s and leave neat and clean.

C. Wall Openings:

1. Fill hollow metal frames built into masonry walls a nd partitions solid with mortar as laying of masonry progresses.

2. When items are not available when walls are built, prepare openings for subsequent installation.

D. Tooling Joints:

1. Do not tool until mortar has stiffened enough to re tain thumb print when thumb is pressed against mortar.

2. Tool while mortar is soft enough to be compressed i nto joints and not raked out.

3. Finish joints in exterior face masonry work with jo inting tool, and provide smooth, water-tight concave joint unless sp ecified otherwise.

4. Tool Exposed interior joints in finish work concave unless specified otherwise.

E. Partition Height:

1. Extend partitions minimum 100 mm (4 inches) above s uspended ceiling or to overhead construction where no ceiling occurs .

2. Extend following partitions to overhead constructio n.

a. Full height partitions, and fire partitions and smo ke partitions indicated on drawings.

b. Both walls at expansion joints.

c. Corridor walls.

04 20 00 - 11

d. Walls at stairway and stair halls, elevators, dumbw aiters, trash and laundry chute shafts, and other vertical shafts .

e. Walls at refrigerator space.

f. Reinforced masonry partitions.

3. Extend finished masonry partitions minimum 100 mm ( 4 inches) above suspended ceiling and continue with concrete masonr y units or structural clay tile to overhead construction:

F. Wall, Furring, and Partition Units:

1. Lay out field units to provide one-half running bon d, unless indicated otherwise.

2. Align head joints of alternate vertical courses.

3. At sides of openings, balance head joints in each c ourse on vertical center lines of openings.

4. Minimum Masonry Unit Length: 100 mm (4 inches).

5. On interior partitions provide 6 mm (1/4 inch) open joint for caulking between existing construction, exterior wa lls, concrete work, and abutting masonry partitions.

6. Use minimum 100 mm (4 inches) nominal thick masonry for free standing furring, unless indicated otherwise.

7. Do not abut existing plastered surfaces except susp ended ceilings with new masonry partitions.

G. Use minimum 100 mm (4 inches) nominal thick masonry for fireproofing steel columns unless indicated otherwise.

H. Before connecting new masonry with previously laid masonry, remove loosened masonry or mortar, and clean and wet work in place as specified under wetting.

I. When new masonry partitions start on existing floor s, machine cut existing floor finish material down to concrete sur face.

J. Wetting and Wetting Test:

1. Test and wet brick and clay tile according to BIA T N 11B.

2. Do not wet concrete masonry units or glazed structu ral facing tile before laying.

K. Temporary Formwork: Provide formwork and shores as required for temporary support of reinforced masonry elements.

L. Construct formwork to conform to shape, line and di mensions indicated on drawings. Make sufficiently tight to prevent mor tar, grout, or

04 20 00 - 12 concrete leakage. Brace, tie and support formwork a s required to maintain position and shape during construction and curing of reinforced masonry.

M. Do not remove forms and shores until reinforced mas onry members have hardened sufficiently to carry their own weight and other reasonable temporary construction loads.

N. Minimum Curing Times Before Removing Shores and For ms:

1. Girders and Beams: 10 days.

2. Slabs: 7 days.

3. Reinforced Masonry Soffits: 7 days.

3.2 INSTALLATION - ANCHORAGE

A. Veneer to Framed Walls:

1. Install adjustable veneer anchors.

2. Fasten anchor to stud through sheathing with self-d rilling and tapping screw, one at both ends of loop type anchor .

3. Space anchors maximum 400 mm (16 inches) on center vertically at each stud.

B. Veneer to Concrete Walls:

1. Install dovetail slots in concrete vertically at 40 0 mm (16 inches) on centers.

2. Locate dovetail anchors at 400 mm (16 inch) maximum vertical intervals.

3. Anchor new masonry facing to existing concrete with adjustable cavity wall ties spaced at 400 mm, (16 inches) maxi mum vertical intervals, and at 400 mm (16 inches) maximum horizo ntal intervals.

Fasten ties to concrete with power actuated fastene rs or concrete nails.

C. Masonry Facing to Backup and Cavity Wall Ties:

1. Use individual ties for new work.

2. Stagger ties in alternate courses, and space at 400 mm (16 inches) maximum vertically, and 400 mm (16 inches) horizont ally.

3. At openings, provide additional ties spaced maximum 900 mm

(36 inches) apart vertically around perimeter of op ening, and within

300 mm (12 inches) from edge of opening.

04 20 00 - 13

4. Anchor new masonry facing to existing masonry with adjustable cavity wall ties spaced at 400 mm (16 inch) maximum vertic al intervals and at every second masonry unit horizontally. Fasten t ies to masonry with masonry nails.

5. Option: Install joint reinforcing for multiple wyth es and cavity wall ties spaced maximum 400 mm (16 inches) vertica lly.

6. Tie interior and exterior wythes of reinforced maso nry walls together with individual ties. Provide ties at inte rvals maximum

400 mm (16 inches) on center horizontally, and 400 mm (16 inches) on center vertically. Lay ties in the same line vertic ally in order to facilitate vibrating of the grout pours.

D. Anchorage of Abutting Masonry:

1. Anchor interior 100 mm (4 inch) thick masonry parti tions to exterior masonry walls with wall ties. Space ties at 600 mm (24 inches) maximum vertical intervals. Extend ties 100 mm (4 i nches) minimum into masonry.

2. Anchor interior masonry bearing walls or interior m asonry partitions over 100 mm (4 inches) thick to masonry walls with rigid wall anchors spaced at 400 mm (16 inch) maximum vertical intervals.

3. Anchor abutting masonry walls and partitions to con crete with dovetail anchors. Install dovetail slots vertically in concrete at centerline of abutting wall or partition. Locate do vetail anchors at

400 mm (16 inch) maximum vertical intervals. Secure anchors to existing wall with two 9 mm (3/8 inch) by 75 mm (3 inch) expansion bolts or two power-driven fasteners.

4. Anchor abutting interior masonry partitions to exis ting concrete and existing masonry construction, with adjustable wall ties. Extend ties minimum 100 mm (4 inches) into joints of new m asonry. Fasten ties to existing concrete and masonry construction, with powder actuated drive pins, nail or other means that provi des rigid anchorage. Install anchors at 400 mm (16 inch) maxi mum vertical intervals.

E. Masonry Furring:

1. Anchor masonry furring less than 100 mm (4 inches) nominal thick to masonry walls or to concrete with adjustable wall t ies or dovetail anchors.

04 20 00 - 14

2. Space at maximum 400 mm (16 inches) on center in bo th directions.

F. Anchorage to Steel Beams or Columns:

1. Use adjustable beam anchors on each flange.

2. At columns weld steel rod to steel columns at 300 m m (12 inch) intervals, and place wire ties in masonry courses a t 400 mm

(16 inches) maximum vertically.

3.3 INSTALLATION - REINFORCEMENT

A. Joint Reinforcement:

1. Install joint reinforcement in CMU wythe of combina tion brick and

CMU, cavity walls, and single wythe concrete masonr y unit walls or partitions.

2. Reinforcing is acceptable in lieu of individual tie s for anchoring brick facing to CMU backup in exterior masonry wall s.

3. Locate joint reinforcement in mortar joints at 400 mm (16 inch) maximum vertical intervals.

4. Additional joint reinforcement is required in morta r joints at both

200 mm (8 inches) and 400 (16 inches) above and bel ow windows, doors, louvers and similar openings in masonry.

5. Wherever brick masonry is backed up with stacked bo nd masonry, install multiple wythe joint reinforcement in every two courses of

CMU backup, and in corresponding joint of facing br ick.

B. Steel Reinforcing Bars:

1. Install reinforcing bars in cells of hollow masonry units where required for vertical reinforcement and in bond bea m units for horizontal reinforcement. Install in wall cavities of reinforced masonry walls where indicated on drawings.

2. Bond Beams:

a. Form Bond beams of load-bearing concrete masonry un its filled with grout and reinforced with two No. 15m (No. 5) reinforcing bars unless shown otherwise. Do not cut reinforceme nt.

b. Brake bond beams only at expansion joints and at co ntrol joints, if shown.

3. Stack Bond:

a. Locate additional joint reinforcement in vertical a nd horizontal joints as indicated on drawings.

04 20 00 - 15

b. Anchor vertical reinforcement into foundation or wa ll or bond beam below.

c. Provide temporary bracing for walls over 8 feet tal l until permanent horizontal bracing is completed.

4. Grout openings:

a. Leave cleanout holes in double wythe walls during c onstruction by omitting units at base of one side of wall.

b. Locate 75 mm by 75 mm (3 inches. by 3 inches.) min. cleanout holes at location of vertical reinforcement.

c. Keep grout space clean of mortar accumulation and d ebris. Clean as work progresses and immediately before grouting.

3.4 INSTALLATION - BRICK EXPANSION AND CMU CONTROL JOINTS

A. Provide brick expansion joint (EJ) and CMU control joints (CJ) where indicated on drawings.

B. Keep joint free of mortar and other debris.

C. Joints Occur in Masonry Walls:

1. Install preformed compressible joint filler in bric k wythe.

2. Install cross shaped shear keys in concrete masonry unit wythe with preformed compressible joint filler on both sides o f shear key.

D. Use standard notched concrete masonry units (sash b locks) made in full and half-length units where shear keys are used to create a continuous vertical joint.

E. Interrupt joint reinforcement at expansion and cont rol joints.

F. Fill opening in exposed face of expansion and contr ol joints with sealant as specified in Section 07 92 00, JOINT SEA LANTS.

3.5 INSTALLATION - BUILDING EXPANSION AND SEISMIC JOINTS

A. Keep expansion and seismic joints open and free of mortar. Remove mortar and other debris.

B. Install non-combustible, compressible type joint fi ller to fill space completely except where sealant is shown on joints in exposed finish work.

C. Fill opening in exposed face of expansion and seism ic joints with sealant as specified in Section 07 92 00, JOINT SEA LANTS.

04 20 00 - 16

3.6 INSTALLATION - ISOLATION JOINT

A. Where full height walls and partitions lie parallel or perpendicular to and under structural beams and shelf angles, provid e minimum 9 mm

(3/8 inch) separation between walls and partitions and bottom of beams and shelf angles.

B. Insert continuous full width strip of non-combustib le type compressible joint filler.

C. Fill opening in exposed face of isolation joints wi th sealant as specified in Section 07 92 00, JOINT SEALANTS.

3.7 INSTALLATION - BRICKWORK

A. Lay clay brick according to BIA TN 11B.

B. Laying:

1. Lay brick in one-half running bond with bonded corn ers, unless indicated otherwise. Match bond of existing buildin g on alterations and additions.

2. Maintain bond pattern throughout.

3. Do not use brick smaller than half-brick at any ang le, corner, break, and jamb.

4. Where length of cut brick is greater than one half length, maintain vertical joint location.

5. Lay exposed brickwork joints symmetrical about cent er lines of openings.

6. Do not structurally bond multi-wythe brick walls, u nless indicated on drawings.

7. Before starting work, lay facing brick on foundatio n wall and adjust bond to openings, angles, and corners.

8. Lay brick for sills with wash and drip.

9. Build solid brickwork as required for anchorage of items.

C. Joints:

1. Exterior and Interior Joint Widths: Lay for three e qual joints in

200 mm (8 inches) vertically, unless shown otherwis e.

2. Rake joints for pointing with colored mortar when c olored mortar is not full depth.

3. Arches:

04 20 00 - 17

a. Flat arches (jack arches) lay with camber of 1 in 2 00 (1/16 inch per foot) of span.

b. Face radial arches with radial brick with center li ne of joints on radial lines.

c. Form Radial joints of equal width.

d. Bond arches into backing with metal ties in every o ther joint.

D. Weep Holes:

1. Install weep holes at 600 mm (24 inches) on center in bottom of vertical joints of exterior masonry veneer or cavit y wall facing over foundations, bond beams, and other water stops in wall.

2. Form weep holes using wicks made of mineral fiber i nsulation strips turned up 200 mm (8 inches) in cavity. Anchor top o f strip to backup to securely hold in place.

3. Install sand or pea gravel in cavity approximately 75 mm (3 inches) high between weep holes.

4. Construct solid brick jambs minimum 20 mm (0.81 inc hes) wide at exterior wall openings and at recesses, except wher e exposed concrete unit backup is shown.

5. Do not install full bonding headers.

6. Parging:

a. For solid masonry walls, lay backup to height of si x brick courses, parge backup with 13 mm (1/2 inch) of mort ar troweled smooth; then lay exterior wythe to height of backup .

b. Make parging continuous over backup and extend 150 mm (6 inches) onto adjacent concrete or masonry.

c. Parge ends and backs for recesses in exterior walls to thickness of 13 mm (1/2 inch).

d. Parge inside surface of exterior walls to produce t rue even surface to receive insulation.

7. Coordinate with building insulation for thickness o f insulation and allowance of air space behind exterior wythe.

8. In locations where hurricane driven rains are expec ted, install bituminous dampproofing on cavity side of inner wyt he.

9. Veneer Framed Walls:

a. Build with 100 mm (4 inches) of face brick over she athed stud wall with air space.

04 20 00 - 18

b. Keep air space clean of mortar accumulations and de bris.

3.8 INSTALLATION - CONCRETE MASONRY UNITS

A. Types and Uses:

1. Provide special concrete masonry shapes as required ,. Provide solid concrete masonry units, where full units cannot be installed, or where needed for anchorage of accessories.

2. Provide solid load-bearing concrete masonry units o r grout cell of hollow units at jambs of openings in walls, where s tructural members impose loads directly on concrete masonry, and wher e shown.

3. Provide rounded corner (bullnose) shapes at opening jambs in exposed work and at exterior corners.

4. Do not install brick jambs in exposed finish work.

5. Install concrete building brick only as filler in b ackup material where not exposed.

6. Construct fire resistance in fire rated partitions meeting fire ratings indicated on drawings.

7. Where lead-lined concrete masonry unit partitions t erminate below underside of overhead floor or roof deck, fill rema ining open space between top of partition and underside of overhead floor or roof deck, with standard concrete masonry units of same thickness as lead lined units.

B. Laying:

1. Lay concrete masonry units with 9 mm (3/8 inch) joi nts, with a bond overlap of minimum 1/4 of unit length, except where stack bond is indicated on drawings.

2. Do not wet concrete masonry units before laying.

3. Bond external corners of partitions by overlapping alternate courses.

4. Lay first course in a full mortar bed.

5. Set anchorage items as work progress.

6. Where ends of anchors, bolts, and other embedded it ems, project into voids of units, completely fill voids with mortar o r grout.

7. Provide 6 mm (1/4 inch) open joint for sealant betw een existing construction, exterior walls, concrete work, and ab utting masonry partitions.

04 20 00 - 19

8. Lay concrete masonry units with full face shell mor tar beds and fill head joint beds for depth equivalent to face shell thickness.

9. Lay concrete masonry units so cores of units, that are to be filled with grout, are vertically continuous with joints o f cross webs of such cores completely filled with mortar. Unobstruc ted core openings minimum 50 mm (2 inches) by 75 mm (3 inches).

10. Do not wedge masonry against steel reinforcing. Min imum 13 mm

(1/2 inch) clear distance between reinforcing and m asonry units.

11. Install deformed reinforcing bars of sizes indicate d on drawings.

12. At time of placement, ensure steel reinforcement is free of loose rust, mud, oil, and other contamination capable of affecting bond.

13. Place steel reinforcement at spacing indicated on d rawings before grouting.

14. Minimum clear distance between parallel bars: One b ar diameter.

15. Hold vertical steel reinforcement in place vertical ly by centering clips, caging devices, tie wire, or other approved methods.

16. Support vertical bars near each end and at maximum 192 bar diameter on center.

17. Splice reinforcement or attach reinforcement to dow els by placing in contact and securing with wire ties.

18. Stagger splices in adjacent horizontal reinforcing bars. Lap reinforcing bars at splices a minimum of 40 bar dia meters.

19. Grout cells of concrete masonry units, containing r einforcing bars, solid as specified.

20. Install cavity and joint reinforcement as masonry w ork progresses.

21. Rake joints 6 to 10 mm (1/4 to 3/8 inch) deep for p ointing with colored mortar when colored mortar is not full dept h.

C. Waterproofing Parging:

1. Parge earth side of concrete masonry unit basement walls with mortar applied in two coats, each coat 6 mm (1/4 inch) thi ck.

2. Clean wall surfaces to receive parging of dirt, oil , or grease, and moisten before application of first coat.

3. Roughen first coat when partially set, permit to ha rdened for 24 hours, and moisten before application of second coa t.

4. Keep second coat damp for minimum 48 hours.

04 20 00 - 20

5. Thicken parging and round to form a cove at the jun ction of outside wall face and footing.

3.9 INSTALLATION - GLAZED STRUCTURAL FACING TILE

A. Lay facing tile in running bond unless indicated ot herwise. Match existing adjacent bond and joints in alteration wor k.

B. Laying:

1. Set facing tile units in full bed of mortar with en ds buttered, and units shoved into place. Fill joints with mortar an d rake out 9 mm

(3/8 inch) deep for pointing.

2. Install clean units when set.

3. Perform cutting and grinding with power-driven cutt ing saws and grinders.

4. Cut or drill units to accommodate electrical outlet s, plumbing fixtures, grab-bars, fittings, and equipment.

5. Cove Base Units:

a. Set base flush with finish floor.

b. Form base course of two-face partitions of two unit s to required thickness.

6. Lay out partitions enclosing pipes or conduits with thickness to provide 50 mm (2 inch) minimum coverage of pipes or conduits.

7. Joints:

a. 6 mm (1/4 inch) nominal width for new work, match e xisting for alteration work.

b. Maximum variations in joint width 2 mm (1/16 inch).

c. Reinforce Two-Face partitions of 100 mm (4 inch) no minal thickness with continuous joint reinforcement, or w ire mesh ties in joints at top of base, at top of glazed structur al facing tile, and at three-course…