SECTION 042000 - UNIT MASONRY PART 1 - GENERAL 1.1 … · For brick, include slze-variation data...

SECTION 042000 - UNIT MASONRY

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

Drawings and general provisions of the Contract, ineloding General and Sopplementary Conditions andDivision 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section Includes:

2.

3.

4.

5.

6.

7.

8.

Concrete masonry units.Face brick.

Mortar and gront.

Steel reinforcing bars.

Masonry joint reinforcement.Ties and anchors.

Embedded flashing.

Miscellaneoos masonry accessories.

1.3 DEFINITIONS

A. CMU(s): Concrete masom'y unit(s).

B. Reinforced Masonry: Masonry containing reinforcing steel in grooted cells.

1.4

A.

PERFORMANCE REQUIREMENTS

Provide structoral unit masonry that develops indicated net-area compressive strengths at 28 days.

Determine net-area compressive strength of masonry from average net-area compressive strengthsof masom'y units and mortar types (unit-strength method) according to Tables 1 and 2 hiACI 530.1/ASCE 6/TMS 602.

1.5

A.

B.

ACTION SUBMITTALS

Product Data: For each type ofproduct indicated.

Shop Drawings: For the following:1. Reinforcing Steel: Detail bending and placement of unit masonry reinforcing bars. Comply with

ACI 315, "Details and Detailing ofConcrete Reinforcement."

2. Fabricated Flashing: Detail corner units, end-dam milts, and other special applications.

Samples for Initial Selection:1. Face brick, in the form of slraps of five or more bricks.2. Glazed brick.

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10-12-2012 042000- 1

3. Colored mortar.

4. Weep holes/vents.

D. Samples for Verification: For each type and color of the following:

2.

3.

4.

Exposed CMUs.Face brick, in the form of straps of five or more bricks.Glazed brick.

Pigmented and colored-aggregate mortar. Make Samples using same sand and mortar ingredientsto be osed on Project.

Weep holes and vents.

Accessories embedded in masonry.

1.6

A.

INFORMATIONAL SUBMITTALS

List of Materials Used in Constructing Mockups: List generic prodoct names together withmanofacturers, manufactnrers' prodact names, model mnnbers, lot numbers, batch numbers• source of

supply, and other information as required to identify materials used. Include mix proportions for mortarand grout and source ofaggregates.

Sobmittal is for infom•ation only. Neither receipt of list nor approval of mocknp constitutesapproval of deviations fi'om the Contract Documents onless such deviatious are specificallybroagbt to the attention of Architect and approved in writing.

Qualification Data: For testing agency.

Material Certificates: For each type and size oftbe following:

1. Masonry units.

Include data on material properties.For brick, include slze-variation data verifying that actaal range of sizes falls withinspecified tolerances.

For exposed brick, include test report for efflorescence according to ASTM C 67.For surface-coated brick, include test report for durability of surface appearance after 50cycles of freezing and tbawing per ASTM C 67.

For masonry units, include data and calcolations establishing average net-area compressivestrengtb ofnnits.

3.

4.

5.

6.

7.

Cementitious materials. Include brand, type, and name of mannfacturer.Preblended, dry mortar mixes. Include descriptinn of type and proportinns of ingredients.Gront mixes. Include description of type and proportions of ingredients.Reinforcing bars.Joint reinforcemeut.

Anchors, ties, and metal accessories.

Mix Designs: For each type of mortarand grout. Include descripfion of type and proportions ofingredieuls.

Include test reports for mortar mixes reqoired to comply with property specification. Testaccording to ASTM C 109/C 109M for compressive streugth, ASTM C 1506 for water retention,and ASTM C 91 for air content.

hlclode test reports, according to ASTM C 1019, for groot mixes reqoired to comply withcompressive streugth requirement.


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Statement of Compressive Strength of Masonry: For each cmnbination of masonry unit type and mortartype, provide slatement of average net-area compressive strength of masonry units, mortar type, andresulting net-area compressive strength of masonry determined according to Tables 1 and 2 inACI 530. I/ASCE 6/TMS 602.

Cold-Weather and Hot-Weather Procedures: Detailed description of methods, materials, and equipmentto be used to comply with requirements.

1.7

A.

B.

QUALITY ASSURANCE

Testing Agency Qualifications: Qaalified according to ASTM C 1093 for testing indicated.

Source Limitations for Masonry Units: Obtain exposed masom'y units ofa nniform texture and color, ora nniform blend within the ranges accepted for these characteristics, from single source from singlemanufacturer for each product required.

Source Lhnitations for Mortar Materlals: Obtain mortar ingredients ofa nnifonn quality, including color

for exposed masonry, fi'om siugle nmnufacturer for each cementltious component and from single sourceor producer for each aggregate.

Masonry Standard: Comply with ACI 530.1/ASCE 6/TMS 602 mdess modified by requirements in theContract Documents.

Mockups: Build mockaps to verify selections made under sample submitlals aod to demoostrate aesthetic

effects and set quality standards for materials and execution.

I. Build mocka•ps for each type of exposed unit masonry construction in sizes approximately 48inches long by 48 inches high by full thickness, including face and backup wythes aodaccessories.

Include a sealant-filled joint at least 16 inches long in each mockup.Include lower comer of window opening at upper comer of exterior wall mockup. Makeopening approximately 12 inches wide by 16 inches high.Include through-wall flashing installed for a 24-inch length in corner of exterior wall

mockup approximately 16 inches down from top of moo!rap, with a 12-inch length offlashing left exposed to view (omit masom2¢ above halfof flaslfing).

Include , veneer anchors, damp-proofing, flashing, cavity drainage material, and weep

holes in exterior masonry-veneer wall mockup.

3.

4.

5.

Where masonry is to match existing, erect mockups adjacent and parallel to existing surface.Clean one-half of exposed faces of mocknps with masonry cleaner as indicated.Protect accepted mockups from the elements with weather-reslstant membrane.Approval of mocknps is for color, texture, and blending of masonry nnits; relationship of mortarand sealant colors to masonry unit colors; tooling of joints; and aesthetic qualities ofworkmanship.

Approval of mockaps is also for other material and cons•uction qaalities specificallyapproved by Architect ha writing.

Approval of mockups does not constitute approval of deviations from the ContractDocuments contained in mocknps unless such deviations are specifically approved byArchitect hi writing.

Approved mockups may become part of the completed Work if nndisturbed at time of SubstantialCompletion.


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F. Preinstallation Conference: Condnct conference at Project site to comply with reqoirements inSection 013100 "Project Management and Coordination."

1.8

A.

DELIVERY, STORAGE, AND HANDLING

Store masonry units on elevated platforms hi a dry location. If units are not stored hi an enclosed

location, cover tops and sides of stacks with waterproof sheeting, securely tied. If nnits become wet, donot install until they are dry.

Store cementitious materials on elevated platforms, under cover, and in a dry location. Do not nsecementitions materials that have become damp.

Store aggregates where grading and other required characteristics can be maintained and contaminationavoided.

Deliver preblended, dry mortar mix in moisture-resistant containers designed for nse with dispensingsilos. Store preblended, dry mortar mLx in delivery containers on elevated platforms, nnder cover, and ina dry location or hi covered weatherproofdispensing silos.

Store masonry accessories, including metal items, to prevent corrosion and accnmnlation ofdirt and oil.

1.9

A.

PROJECT CONDITIONS

Protection of Masonry: During construction, cover tops of walls, projections, and sills with waterproofsheeting at end of each day's work. Cover partially completed masonry when construction is not inprogress.

1. Extend cover a minimom of 24 inches down both sides ofwalls and hold cover securely in place.2. Where ooe wythe of moltiwythe masonry walls is cmnpleted in advance of otber •vythes, secure

cover a minimum of24 inches down face next to unconstructed wythe and hold cover in place.

Do not apply uniform floor or roof loads for at least 12 hours and concentrated loads for at least three

days after building masonry walls or columns.

Stain Prevention: Prevent grout, mortar, and soil from staining the face of masonry to be left exposed orpainted. Immediately remove grout, mortar, and soil that come in contact with soch masmtry.

1. Protect base ofwalls from rain-splashed mud and from mortar splatter by spreading coverings ongronnd and over wall surface.

2. Protect sills, ledges, and projections from mortar droppings.3. Protect surfaces of window and door flames, as well as similar products with painted and integral

finishes, from mortar droppings.

4. Turn scaflbld boards near tbe wall on edge at the end of each day to prevent rain from splashingmortar and dirt onto completed masoory.

Cold-Weather Requirements: Do not use flozen materials or materials mixed or coated with ice or frost.

Do not build on frozen substrates. Remove and replace onit masonry damaged by frost or by freezingconditions. Comply with cold-weather construction requirements contained inACI 530.1/ASCE 6/TMS 602.

Cold-Weatber Cleaning: Use liquid cleaning methods ooly wben air temperata•re is 40 deg F andhigher and will remain so outil maso•n2¢ has dried, bot uot less than seven days after completingcleaning.


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E. Hot-Weather Requirements: Comply with hot-weather construction requirements contained inAC1 530.1/ASCE 6/TMS 602.

PART 2 - PRODUCTS

2.1

A.

MASONRY UNITS, GENERAL

Defective Units: Referenced masonry unit standards may allow a certain percentage of units to contuinchips, cracks, or other defects exceeding limits stated in the standard. Do not use units where suchdefects will be exposed in the completed Work.

Fire-Resistance Ratings: Where indicated, provide units that comply with requirements for fu'e-resistance

ratings indicated as determined by testing according to ASTM E 119, by equivalent masonry thickness, orby other means, as acceptable to authorities having jurisdiction.

2.2

A.

CONCRETE MASONRY UNITS

Regional Materials: CMUs shall be manufactured within 500 miles of Project site fi'om aggregates andcement flint have been extracted, harvested, or recovered, as well as manufactured, witbin 500 miles of

Project site.

Shapes: Provide shapes indicated and as follows, with exposed surfaces matching exposed faces ofadjacent onits unless otherwise indicated.

Provide special shapes for lintels, corners, jambs, sashes, movement joints, headers, bonding, andother special conditions.Provide sqaare-edgedunits for ontside coruers uniess otberwise indicated.

C. CMUs: ASTM C 90.

Unit Compressive Strengtb: Provide onits with minimum average net-area compressive strengthof2150 psi

Density Classification: Noruml weight.Size (Widtl0: Manufactured to dimensions 3/8 incb less than nominal dimeoslons.

4. Exposed Faces: Provide color and textnre matching the range represented by Architect's sample.

2.3

A.

B.

MASONRY LINTELS

Generul: Provide one of the following:

Masonry Lintels: Prefabricated or bnilt-in-place masonry lintels made fi'om bond beam CMUs withreinforcing bars placed as indicated and filled with coarse grout. Care precast lintels before handling andinstalling. Temporarily support built-in-place lintels until cured.

2.4 BRICK

A. Regional Materials: Brick shall be manufactured within 500 miles of Project site fi'om materials thatbave been extracted, harvested, or recovered, as well as mamffactured, within 500 miles of Project site.


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General: Provide shapes indicated and as follows, with exposed surfaces matching finish and color ofexposed faces ofadjacent nnits:

1. For cuds of sills and caps and for similar applications that •vonld otherwise expose unfinishedbrick surfaces, provide units without cores or frogs and with exposed surfaces fmished.

2. Provide special shapes for applications where stretcher nnits canuot accommodate specialconditions, including llmse at corners, movement joints, bond beams, sashes, and lintels.

3. Provide special shapes for applications reqoiring brick ofsize, form, color, and texture on exposedsurfaces that cannot be prodaced by sawing.

4. Provide special shapes for applications where shapes produced by sawing would resnlt in sawedsurfaces being exposed to view.

C. Face Brick: Facing brick complying with ASTM C 216.

Grade: Mateb existing/.Type: Match existing..

Unit Compressive Strength: Provide units with miniraum average net-area compressive strengthof 3350 psi .

Initial Rate of Absorption: Less than 30 g/30 sq. in. per minute wben tested per ASTM C 67.Efflorescence: Provide brick that has been tested according to ASTM C 67 and is rated "noteffloresced."

Sarface Coating: Brick with colors or textures produced by application ofcoatings shall withstand50 cycles of freezing and tliawing per ASTM C 67 with no observable difference in the appliedfinish wben viewed from 10 feet.

Size (Actual Dhnensions): Match existing..Application: Use wbere brick is exposed unless otherwise indicated.Where shown to "matcli existing," provide face brick matching color range, texture, and size ofexisting adjacent brickwork.

10. Color and Texture: Match existing..

D. Glazed Face Brick: Match existing accent band brick.

2.5 MORTAR AND GROUT MATERIALS

A. Portland Cement: ASTM C 150, Type l or I1, except Type Ill may be used for cold-weather construction.Provide natural color or white cement as reqoired to produce nmrtar color indicated.

B. Hydrated Lime: ASTM C 207, Type S.

C. Portland Cement-Lhne Mix: Packaged blend of portlaud cement and hydrated lime containing no otheringredients.

D. Masonry Cement: ASTM C 91.

E. Mortar Cement: ASTM C 1329.

F. Mortar Pigments: Nataral and synthetic iron oxides and chromium oxides, componnded for use in nmrtarmixes and complying with ASTM C 979. Use only pigments with a record ofsatisfactory performance inmasom2¢ mortar.

G. Colored Cement Prodnct: Packaged blend made from portland cement and hydrated lhne and mortarpigments, all complying with specified requirements, and containing no other ingredients.


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Formulate blend as required to produce color indicated or, if uot indicated, as selected frommanufacturer's standard colors.

Pigments shall not exceed 10 percent ofportland cement by weight.

H. Aggregate for Mortar: ASTM C 144.

For mortar that is exposed to view, use wasbed aggregate consisting of natural sand or crashedstone.

For joints less than 1/4 inch thick, use aggregate graded with 100 percent passing tbe No. 16 sieve.White-Mortar Aggregates: Natural white sand or crashed white stone.Colored-Mortar Aggregates: Natural saud or crushed stone of color necessary to produce requiredmm'tar color.

Aggregate for Grout: ASTM C 404.

Epoxy Pointing Mortar: ASTM C 395, epoxy-resin-based material formulated for use as pointing •nortarfor structural-clay tile facing nnits (and approved for such use by manufacturer of units); in colorindicated or, if not otherwise indicated, as selected by Architect fi'om manufacturer's colors.

Cold-Weather Admixture: Nonchloride, noncorrosive, accelerating admixture complying with

ASTM C 494/C 494M, Type C, and recommended by manufacturer for use in masonry umrlar ofcomposition indicated.

L. Water: Potable.

2.6

A.

B.

REINFORCEMENT

Uncoated Steel Reinforcing Bars: ASTM A 615/A 615M or ASTM A 996/A 996M, Grade 60.

Masonry Joint Reinforcement, General: ASTM A 951/A 951M.

1. Interior Walls: Hot-dip galvanized, carboo steel.2. Exterior Walls: Hot-dip galvanized, carbon steel.3. Wire Size for Side Rods: 0.148-inch diameter.

4. Wire Size for Cross Rods: 0.148-inch diameter.

5. Wire Size for Veneer Ties: 0.148-h•ch diameter.

6. Spacing ofCross Rods, Tabs, and Cross Ties: Not more than 16 inches o.c.7. Provide in lengths ofnot less than I 0 feel, with prefabricated corner and tee nnits.

Masonry Joint Reinforcement for Single-Wythe Masonry: Either ladder or truss type with single pair ofside rods.

Masonry Joint Reinforcement for Moltiwythe Masonry:1. Adjustable (two-piece) type, either ladder or •ass design, with one side rod at each face shell of

backing wythe and with separate adjustable ties with pintle-and-eye connections having amaximum adjustu•ent of I-1/4 i•ches. Size ties to extend at least halfway tbrough facing scythebut with at least 5/8-inch cover on outside face. Ties have hooks or clips to engage a continuons

horizontal wire in the facing svythe.

2.7

A.

TIES AND ANCHORS

Materials: Provide ties and anchors specified in this article that are made fi'om materials that comply withthe following nnless otherwise indicated.


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Hot-Dip Galvanized, Carbon-Steel Wire: ASTMA82/A 82M; •vith ASTMA 153/A 153M,Class B-2 coating.Steel Plates, Sbapes, and Bars: ASTM A 36/A 36M.

Wire Ties, General: Unless otherwise indicated, size wire ties to extend at least half•vay through veneerbut with at least 5/8-inch cover on ootside face. Outer ends of wires are bent 90 degrees and extend 2inches parallel to face of veneer.

lndividnal Wire Ties: Rectangular units with closed ends and not less than 4 inches wide.

1. Z-shaped ties with ends bent 90 degrees to provide hooks not less than 2 inches long may be nsedfor masm•ry coustrncted from solid nnits.

2. Where •vytbes do not align, use adjostable ties with pintle-and-eye connections having amaximum adjnstment of 1 -1/4 inches.

3. Wire: Fabricate from l/4-inch- diameter, hot-dip galvanized steel wire.

Adjostable Anchors for Connecting to Stroctural Steel Framing: Provide anchors that allow vertical orhorizontal adjustment bot resist tension and compression forces perpendicular to plane ofwall.

Anchor Section for Welding to Steel Frame: Crimped 1/4-inch- diameter, bot-dip galvanized steelwire.

Tie Section: Triangolar-shaped wire tie, sized to extend within i inch of masonry face, made fi'om0.25-inch- diameter, hot-dip galvanized steel wire.

Partition Top authors: 0.105-inchthick metal plate with 3/8-inch- diameter metal rod 6 inches longwelded to plate and with closed-end plastic tabe fitted over rod that allows rod to move in and out of tube.Fabricate from steel, hot-dip galvanized after fabrication.

Adjustable Masonry-Veneer Anchors:

General: Provide anchors that allow vertical adjostment but resist tension and compression forcesperpendicolar to plane of wall, for attachment over sheatbing to wood or metal stads, and asfollo•vs:

Structoral Performance Characteristics: Capable of withstanding a 100-1bf load in bothtensioo and compression without deforming or developing play in excess of 0.05 inch.

Contractor's Option: Unless otherwise indicated, provide any of the following types ofanchors:Screw-Attached, Masonry-Veneer Authors: Units consisting of a wire tie and a metal anchorsection.

a. Pr•duc!•: Subject to compliance with requirements, provide the following:

1) l_)•m• _•eri•r C•lri2•'•tinn, I)t•r-O-Wal I)ivision; D/A213 or D/A210 withD/A 700-708.

2) •_•.•nmm l•u•j•)g Prodncls •ac.; 315-D with 316 or Pos-l-Tie.3) F•oimnmn & •.•3)z•rd, Inc.; DW-10 DW-10HS or DW-10-X.

4) Wire-•3ond; 1004, Type 1II or SnreTie.

Anchor Section: Gasketed sheet metal plate, l-1/4 inches wide by 6 h•ches long, withscrew holes top and bosom; top and bosom ends bent to form pronged legs of length tomatch ftfic•ess of •salation or sheathing; and raised rib-stiffened strap, 5/8 incb wide by6 inches long, slamped into center to provide a slot between strap and plate for inse•gwire tie. Provide anchor manufach•rer's staudard, self-adher•g, modified bituminousgaskets manofactured to fit bebind anchor plate and extend beyond pronged legs.

NCDA&CS TIDEWATER GREENHOUSE UNIT MASONRY10-12-2012 042000 - 8

Fabricate sheet metal anchor sections and other sheet metal parts from 0.075-inchthick,

steel sheet, galvanized after fabrication.Wire Ties: Triangular-, rectangalar-, or T-shaped wire ties fabricated from 0.25-inch-diameter, hot-dip galvanized steel wire.

2.8 MISCELLANEOUS ANCHORS

A. Unit Type Inserts in Concrete: Cast-iron or malleable-iron wedge-type inserts.

B. Anchor Bolts: Headed or L-shaped steel bolts complying with ASTM A 307, Grade A; withASTM A 563 hex nuts and, where indicated, fiat washers; hot-dip galvanized to comply withASTM A 153/A 153M, Class C; ofdimensinns indicated.

2.9

A.

EMBEDDED FLASHING MATERIALS

Metal Flashing: Provide metal flashing cmnplying with SMACNA's "Architectural Sheet Metal Manual",Section 076200 "Sheet Metal Flashing and Trim" and as follows:

1. Copper: ASTM B 370, Temper H00, cold-rolled copper sheet, 16-oz./sq. ft. weight or 0.0216 inchthick or ASTM B 370, Temper H01, high-yield copper sheet, 12-oz./sq. ft. weight or 0.0162 inchthick.

2. Fabricate continuons flashings in sections 96 inches long mini•num, but not exceeding 12 feet.Provide splice plates at joints of formed, smooth metal flashing.

3. Fabricate through-wall metal flashing embedded in masom2¢ from copper, with ribs at 3-1nchintervals along length of flashing to provide an integral mortar bond.

Fabricate ll•rough-wall flashing with snaplock receiver on exterior face where indicated to receivecounterflashing.

Fabricate throogh-wall flashing with drip edge mdess otherwise indicated. Fabricate by extendingflashing 1/2 inch out fi'om wall, with outer edge bent down 30 degrees and hemmed.Metal Drip Edge: Fabricate from stainless steel. Extend at least 3 inches into wall and 1/2 inchout from wall, with outer edge bent down 30 degrees aud henm•ed.

B. Flexible Flashing: Use the following unless otherwise indicated:

Robberized-Asphalt Flasiring: Composite flashing product consisting of a pliable, adhesiverubberized-asphalt compound, bonded to a high-density, cross-laminated polyethylene fihn toproduce an overall thickness of not less ll•an 0.040 inch.

a. Prodacts: Sobject to compliance with reqoiremeuts, provide the following:

1) Advanced t3uilding Prodacts Inc.; Peel-N-Seal.2) •!!_•;h\'•[c Co•il!gs & Waterprool_i•?g; CCW-705-TWF Thru-Wall Flashing.3) I)•ton Su/kQ•j•L_C•q•oratiot•. [3m'-O-Wal Division; Dar-O-Barrier T•a-Wall

Flash•g.

4) (}race Constrt•$i9•! J.r.o(.in_9•. W, R, Grace & Co, - Conn.; Pe•-A-Barrier WallFlas•g.

5) l leckmana Buiktiagp•.g•{•.l!!•; No. 82 Rubberized-Asphalt Thru-Wall Flashing.6) ! l¢•hmann & Bamm'• •!•,; Tex•oflash.7) W, R: Meadows; h•=; Air-Shield T•-WaH Flashing.8) Will•ams Prodnc•s, luC•; Everlastic MF-40.

Accessories: Provide preforined corners, eud dams, other special shapes, and seamingmaterials produced by flashing manufacturer.

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Adhesives, Primers, and Seam Tapes for Flashings: Flashing manufacturer's standard products orproducts recommended by flasking manufactarer for bonding flasbing sheets to each other and tosnbstrates.

2.10

A.

B.

C.

D.

MISCELLANEOUS MASONRY ACCESSORIES

Compressible Filler: Premolded filler strips complying with ASTM D 1056, Grade 2AI; compressible npto 35 percent; ofwidth and thickness indicated; formulated from neoprene urethane or PVC.

Preformed Control-Joint Gaskets: Made from and designed to fit standard sash block and to maintainlateral stability in masonry wall; size and confignration as indicated.

Bond-Breaker Strips: Asphalt-saturated, organic roofing felt complying with ASTM D 226, Type I(No. 15 asphalt felt).

Weep/Vent Products: Use the following ouless otherwise indicated:

I. Cellnlar Plastic Weep/Vent: One-piece, flexible extrusion made from UV-resistant polypropylenecopolymer, full height and width of bead joint and depth •/8 inch less than depth of outer wytlie,in color selected from manufacturer's standard.

Mesh Weep/Vent: Free-draining mesh; made from polyethylene strands, full height and width ofhead joiut and depth 1/8 inch less than depth ofonter wylhe; in color selected fi'om manufactnrer'sstandard.

Vinyl Weep Hole/Vent: Oue-piece, offset, T-slmped units made from flexible PVC, designed tofit into a head joint and consisting ofa Ionvered vertical leg, flexible xvings to seal against ends ofmasm•ry nnits, and a top flap to keep mortar out of the liead joint; in color selected by Arcliitect.

a. _Prodt_jgt•: Snbject to compliance with reqnirements, provide the following:

1) llohmam• & 13arnard, lnc,; #343 Lonvered Weep Hole.2) W__illj•!ms Prod•t!•t• Inc.; Williams-Goodco Brick Vent.3) Wi•:Bond; Lonvered Weepboles.

Cavity Drainage Material: Free-draining mesh, made from polymer strands tlmt ,,viii not degrade withinthe wall cavity.

1. F•'9•iLl•:ts: Snbject to compliauce with requirements, provide the following:

Ady•!mc_edB•fil;•ug Prodttc•:• ! nc.; Mortar Break, Mortar Break 11.A•:[g!w•im•s, I•; CavClear Masonry Mat.

l)•ytgo.Super•;C:9•ti(•.), Dur-O-Wal I)ivisiou; Pol•ite MorlarStop.Mm'tar Net U•4, Ltd.; Molar Net.

2. Provide one of the following configarations:

Strips, full-deptli of cavity and 10 h•ches ldgh, witli dovetail shaped notches 7 incites deepthat prevent clogging with mortar droppings.

Reinforcing Bar Positioners: Wire milts designed to fit into mortar bed joints spanning masonry unit cellsand liold reinforcing bars in center of cells. Units are formed from 0.148-incli steel wire, lint-dipgalvanized after fabrication. Provide traits designed for number of bars indicated.

NCDA&CS TIDEWATER GREENHOUSE UNIT MASONRY10-12-2012 042000- 10

2.11 CAVITY-WALL INSULATION

A. Exlroded-Polystyrene Board Insulation: ASTM C 578, Type IV, closed-cell product extruded with anintegral skin.

B. Adhesive: Type recommended by insulation board manufacturer for application indicated.

2.12

A.

MASONRY CLEANERS

Proprietary Acidic Cleaner: Mannfacturer's standard-strength cleaner designed for removingmortar/groot stains, efflorescence, and other new construction stains from new masonry withoutdiscoloring or damaging masonry snrfaces. Use product expressly approved for intended ose by cleanermanufacturer and manufacturer ofmasonry units being cleaned.

2.13

A.

MORTAR AND GROUT M/XES

General: Do not ose admixtures, including pigments, air-entraining agents, accelerators, retarders, water-

repellent agents, antifreeze componnds, or other admixtures, unless otherwise indicated.

2.

3.

4.

Do not rise calcinm chloride in mortar or grout.

Use portland cement-lime mortar anless otherwise indicated.For reinforced masmtry, ose portland cement-lime mortar.Add cold-weather admixture (if nsed) at same rate for all mortar that will be exposed to view,

regardless of weather conditions, to ensure that mortar color is consistent.

Mortar for Unit Masonry: Comply witb ASTM C 270, Proportion Specification. Provide the followingtypes ofmortar for applications stated unless another type is indicated.

For masomy below grade or in contact with earth, use Type S.For reinforced masonry, use Type S.For exterior, above-grade, load-bearing and non-load-bearing walls and parapet walls; for interiorload-bearlng walls; for interior non-load-bearing partitions; and for other applications where

another type is not indicated, ose Type N.For interior non-load-bearing partitions, Type O may be osed instead ofType N.

Pigmented Mortar: Use colored cement product or select and proportion pigments with otber ingredientsto produce color required. Do not add pigments to colored cement products.

1. Pigments shall not exceed 10 percent ofportland cement by weight.2. MLx to match existing building.3. Application: Use pigmented mortar for exposed mortar joints with the following units:

a. Face brick.

D. Grout for Unit Masonry: Comply with ASTM C 476.

1. Use grout of type indicated or, if not otbep,vise indicated, of type (fine or coarse) that will complywith Table 1.15.1 in AC1 530. I/ASCE 6/TMS 602 for dimensions of grout spaces and pour beight.

2. Proportion grout in accordance with ASTM C 476, Table I or paragrapb 4.2.2 for specified 28-daycompressive strength indicated, hot not less than 20130 psi.

3. Provide grout with a slump of 8 to 11 inches as measored according to ASTM C 143/C 143M.


10-12-2012 042000 - 11

PART 3 - EXECUTION

3.1 EXAMINATION

Examine conditions, with Installer present, for compliance with requirements for installation tolerancesand other conditions affecting performance of the Work.

1. For the record, prepare written report, endorsed by Installer, listing conditions detrimental toperformance ofwork.

2. Verify that foundations are within tolerances specified.3. Verify that reinforcing dowels are properly placed.

Before installation, examine rungh-in and bnilt-in construction for piping systems to verify acttmllocations ofpiping connections.

Proceed with installation only after unsatisfactory conditions have been corrected.

3.2 INSTALLATION, GENERAL

A. Thickness: Boild cavity and composite walls and other masonry construction to filll thickness shown.Build single-wythe walls to actual widths of masonry nnits, nsing nnlts ofwidths indicated.

B. Build chases and recesses to accmnmodate items specified in this and other Sections.

C. Leave openings for equipment to be installed before completing masonry. After installing eqnipment,complete masmlry to match the construction immediately adjacent to opening.

D. Use fifll-size units withont cntiing if possible. If cutting is reqnired to provide a continuous pattern or tofit adjoining constrnction, cut units with motor-driven saws; provide clean, sharp, nnchipped edges.Allow onits to dry before laying unless wetting of units is specified. Install cut units with cut surfacesand, where possible, cut edges concealed.

E. Select and arrange units for exposed unit masonry to prodace a uniform blend ofcolors and textures.

I. Mix units from several pallets or cubes as they are placed.

F. Matching Existing Masonry: Match coursing, bonding, color, and texture ofexisting masonry.

G. Wetting of Brick: Wet brick before laying if initial rate of absorption exceeds 30 g/30 sq. in. per minntewhen tested per ASTM C 67. Allow units to absorb water so they are damp but not ",vet at time of laying.

3.3

A,

TOLERANCES

Dimensions and Locations of Elements:

For dimensions in cross section or elevation do not vary by more than plus 1/2 inch or minns t/4inch.

For location of elements in plan do not vary from tliat indicated by more than plos or minus 1/2inch.

For location of elements in elevation do not vary fi'om that indicated by more than plus or minus1/4 inch in a story height or 1/2 inch total.


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B. Lines and Levels:

2.

3.

4.

For bed joints and top surfaces ofbearing walls do not vary from level by more than 1/4 inch iu 10feet, or l/2 inch maximnm.

For conspicuous horizontal lines, such as lintels, sills, parapets, and reveals, do not vary from levelby more than l/8 inch in 10 feet, 1/4 inch in 20 feet, or I/2 inch maximum.For vertical lines and surfaces do not vary from plumb by more than 1/4 inch in 10 feet, 3/8 inchin 20 feet, or 1/2 inch maxinmm.

For conspicuous vertical lines, snch as external comers, door jambs, reveals, and expansion andcontrol joints, do not vary from plamb by more than l/8 inch in I0 feet, 1/4 inch in 20 feet, or I/2inch maximnm.

For lines and surfaces do not vary from straight by more than 1/4 inch in 10 feet, 3/8 inch in 20feet, or I/2 inch mardmum.

For vertical allgmnent ofexposed head joints, do not vary from plumb by more than 1/4 inch in 10feet, or l/2 inch maximnm.

For faces of adjacent exposed masonry units, do not vary from flush aligmnent by more than 1/16

inch except due to warpage of masonry units within tolerances specified for warpage ofnnits.

Joints:

2.

3.

4.

5.

For bed joints, do not vary from thickness indicated by more than plus or minus 1/8 inch, with amaximum thickness limited to 1/2 inch.

For exposed bed joints, do not vary from bed-joint thickness of adjacent conrses by more than 1/8inch.

For head and collar joints, do not vary from thickness indicated by more than plus 3/8 inch orminas 1/4 inch.

For exposed head joints, do not vary from thickness indicated by more than plus or minus 1/8inch.

For exposed bed joints and head joints of stacked bond, do not vary from a sivaight line by morethan 1/16 inch from one masonry anit to the next.

3,4

A,

LAYING MASONRY WALLS

Lay ont walls in advance for accurate spaciug of surface bond patterns with uniform joint thicknesses andfor accurate locatiou of openings, movement-type joints, returns, and offsets. Avoid using less-than-half-size units, particnlarly at comers, jambs, and, where possible, at other locations.

Bond Pattern for Exposed Masonry: Unless othenvise indicated, lay exposed masonry in running bond orbond pattern indicated on Drawiugs; do uot use nulls with less than nominal 4-inch horizontal facedimensions at corners or jambs.

Lay concealed masom2¢ with all units in a wythe in rmuimg bond or bonded by lapping not less thau 4-inches. Bond and interlock each conrse of each wythe at comers. Do not ase nulls with less thanuominal 4-inch horizontal face dimensions at corners or jambs.

Stopping and Resnming Work: Stop work by racking back units in each course from those in coursebelow; do not tooth. When resnming work, clean masonry surfaces that are to receive mortar, remove

loose masonry units aud mortar, and wet brick if required before laying fresb masmtry.

Bnilt-in Work: As construction progresses, bnild iu items specified in this aud other Sections. Fill insolidly with masomy around built-in items.

Fill space between steel frames and masonry solidly with mortar unless other,vise indicated.


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Where built-in items are to be embedded in cores of hollow masom'y unlts, place a layer of metal lath,wire mesh, or plastic mesh in the joint below and rod mortar or grout into core.

Fill cores in hollow CMUs with grout 24 inches under bearing plates, beams, lintels, posts, and similaritems unless other•vise indicated.

Build non-load-bearing interior partitions full height of story to underside of solid floor or roof structureabove unless otherwise indicated.

1. Install compressible filler in joint between top ofpartition and underside ofstructure above.

3.5

A.

MORTAR BEDDING AND JOINTING

Lay hollow brick and CMUs as follows:

1. With face shells fidly bedded in mortar and with head joints ofdepth equal to bed joiots.2. Wifu webs fully bedded in mortar in all conrses ofpiers, cohunns, and pilasters.3. With webs fully bedded in mortar in gronted masomy, including starting course on footings.4. With entire units, including areas under cells, fully bedded in mortar at starting course on footings

where cells are not grouted.

Lay solid masonry units with completely filled bed and head joints; butter ends with sufficient mortar tofill head joints and shove into place. Do not deeply furrow bed joints or slnsb head joints.

Tool exposed joints slightly concave when thumbprint hard, asing a jointer larger than joint thicknessunless otherwise indicated.

Cut joints flush for masonry walls to receive plaster or other direct-applied finishes (other than pain0nnless otherwise indicated.

3.6

A.

CAVITY WALLS

Bond wythes ofcavity ,,vails together using one of the following methods:

Individual Metal Ties: Provide ties as shown installed in horizontal joints, but not less than onemetal tie for 2.67 sq. ft. ofwall area spaced not to exceed 24 inches o.c. horizontally and 16 incheso.c. vertically. Stagger ties in alternate courses. Provide additional ties witbin 12 inches of

openings and space not more than 36 inches apart around perimeter of openings. At intersectingand abutiing walls, provide ties at no more than 24 inches o.c. vertically.

Where bedjoinls of wythes do not align, ose adjustable (two-piece) type ties.Where one wythe is of clay masomy and the otber of coucrete masonry, use adjustable(two-piece) type ties to allow for differential movement regardless of whetber bed jointsalign.

2. Masonry Joint Reinforcement: Installed in horizontal mortar joints.

Where bed joints ofboth wythes align, use tab-type reinforcement.Where one wythe is of clay masonry and the other of concrete masonry, use adjustable(two-piece) type reinforcement witb continuous horizontal wire in facing •vyfue attached toties to allow for differential movement regardless of whether bed joints align.


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Header Bonding: Provide masonry unit headers extending not less than 3 inches into each wythe.Space headers not over 8 inches dear horizontally and 16 inches clear vertically.Masonry Veneer Anchors: Comply with requirements for anchoring masonry veneers.

Bond wyihes of cavity walls together osing bonding system indicated on Drawings.

Keep cavities clean ofmortar droppings and other materials during construction. Bevel beds away fromcavity, to minimize mortar protrasions into cavity. Do not attempt to trowel or remove mortar finsprotruding into cavity.

Coat cavity face ofbackup wythe to comply with Section 071113 "Bituminoos Dampproofing."

Installing Cavity-Wall Insolation: Place small dabs of adhesive, spaced approximately 12 inches o.c.both ways, on inside face of insulation boards, or attach with plastic fasteners designed for this porpose.Fit courses of insolation between wall ties and other confining obstructinns in cavity, with edges botled

tightly both ways. Press units firmly against inside wythe of masonry or other construction as shown.

1. Fill cracks and open gaps in insolation with crack sealer compatible with insulatlon and masonry.

3.7

A.

C.

D.

E.

MASONRY JOINT REINFORCEMENT

General: Install entire length of longitudinal side rods in mortar with a minimnm cover of 5/8 inch onexterior side of walls, 1/2 inch elsewhere. Lap reinforcement a minimum of6 inches.

Space reinforcement not more than 16 inches o.c.Space reinforcemeut not more than 8 inches o.c. in foundation walls and parapet walls.Provide reinforcement not more than 8 inches above and below wall opeuings and extending •2

inches beyond openings in addition to continuous reinforcement.

Interrupt joint reinforcement at coutrol and expansion joints nnless other,vise indicated.

Provide contintfity at wall intersections by using prefabricated T-shaped traits.

Provide continuity at corners by using prefabricated L-shaped nnits.

Cot and bend reinforcing nnits as directed by mannfacturer for continuity at corners, returns, offsets,

column fireproofing, pipe enclosores, and other special conditions.

3.8

A.

ANCHORING MASONRY TO STRUCTURAL STEEL AND CONCRETE

Anchor masonry to structural steel and concrete where masonry abuts or faces structural steel or concrete

to comply with the following:

Provide an opeu space not less than 1/2 inch wide between masonry and structural steel orconcrete unless otherwise indicated. Keep open space free ofmortar and other rigid materials.Anchor masonry wllh auchors embedded in masonry joints and attached to stracture.Space anchors as indicated, but not more than 24 inches o.c. vertically and 36 inches o.c.horizontally.


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3.9

A.

ANCHORING MASONRY VENEERS

Anchor masonry veneers to concrete and masonry backup with masonry-veneer anti,ors to comply withthe following requirements:

1. Space anchors as indicated, bot not more than 16 inches o.c. vertically and 24 inches o.c.horizontally with not less than 1 anchor for each 2.67 sq. ft. of wall area. Install additionalanchors withh• 12 inches of openings and at intervals, not exceeding 36 inches, around perimeter.

3.10

A.

CONTROL AND EXPANSION JOINTS

General: Install control and expansion joint materials in unit masoitry as masonry progresses. Do notallow materials to span control and expansion joints without provision to allow for in-plane wall orpartition movement.

Form control joints in concrete masomy using one of the following methods:

1. Fit boud-breaker strips into hollow contour in ends of CMUs on one side of control joint. Fillresultant core with grout and rake out joints in exposed faces for application ofsealant.

2. Install preformed control-joint gaskets designed to lit standard sash block.3. Install interlocking units designed for control joints. Install bond-breaker strips at joint. Keep

head joints flee and clear of mortar or rake oot joint for application ofsealant.4. Install temporary foam-plastic filler in head joints and remove filler when nnit masonry is

complete for application ofsealant.

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LINTELS

Install steel lintels where indicated.

3.12

A.

FLASHING, WEEP HOLES, CAVITY DRAINAGE, AND VENTS

General: Install embedded flashing and weep holes in masonry at shelf angles, lintels, ledges, otherobstructions to downward flow ofwater in wall, and where indicated.

B. Install flashing as follows uniess otherwise indicated:

Prepare masonry sorfaces so they are smooth and free from projections that could punctureflashing. Where flashing is within mortar joint, place through-wall flashing on sloping bed ofmortar and cover with mortar. Before covering with mortar, seal penetrations in flashing withadhesive, sealant, or tape as recommended by flashing manufacturer.At multi•vythe masomy walls, including cavity walls, extend flashing through outer wythe, turnedup a minimum of 4 inches, and through inner wythe to within i/2 inch of the interior face of wallin exposed masonry. Where interior face of wall is to receive furring or framing, carry flashingcompletely throogh hmer wythe and turn flashing tip approxhnately 2 inches on interior face.At multiwythe masonry wails, including cavity walls, extend flashing through outer wythe, turnedap a m•imom of 8 inches, and 1-1/2 inches into the inner wythe.At lintels and shelf angles, extend flashing a minimum of 6 inches into masonry at each end. Atheads and sills, extend flashing 6 inches at ends and turn up not less than 2 inches to form enddams.

Cut flexible flashing off flush with face ofwall after masonry wall constrtlctlon is completed.

Install reglets and nailers for flashing and other related constraction where they are shown to be built intomasmwy.


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D. Install weep holes in bead joints in exterior wythes of first course of masonry immediately aboveembedded flashing and as follows:

I. Use specified •veep/vent products to form weep holes.2. Space weep holes 24 inches o.c. unless other,vise indicated.

Place cavity drainage material in cavities to comply with configuration reqoirements for cavity drainagematerial in "Miscellaneous Masonry Accessories" Article.

3.13

A.

REINFORCED UNIT MASONRY INSTALLATION

Temporat3• Formwork and Shores: Construct formwork and shores as needed to support reinforcedmasonry elements during constn•ctinn.

Constn•ct formwork to provide shape, line, and dimensions of completed masoury as indicated.Make forms sufficiently tight to preveut leakage of mortar and grout. Brace, tie, and supportforms to maintain position and sbape doring construction and curing ofreinforced masoury.Do not remove forms and shores ontil reinforced masonry members have hardened sofficiently toca•xy their own weight and other loads that may be placed on them during construction.

Placing Reinforcement: Comply with requiremeuts in ACI 530.1/ASCE 6/TMS 602.

Grooting: Do not place groot until entire height of masonry to be grooted has attained enongh strength toresist grout pressure.

Comply with requirements in ACI 530. I/ASCE 6/TMS 602 for cleanouts and for grout placement,including minimmn gront space and maximom pour height.Linfit height ofvertical grout pours to not more than [60 iuches

3.14

A.

REPAIRING, POINTING, AND CLEANING

Remove and replace masom'y units that are loose, chipped, brokeu, stained, or otherwise damaged or thatdo not matcb adjoining units. Install new units to match adjoining units; install in fi'esh mortar, pointed toelin•inate evidence of replacement.

Pointing: Doting the tooling of joints, enlarge voids and holes, except weep holes, and completely fillwith mortar. Point up joints, including conlers, openings, and adjacent constnictiou, to provide a neat,uniform appearance. Prepare joints for sealant application, where indicated.

In-Progress Cleaning: Clean unit masonry as work progresses by dry brusbing to remove mortar fins andsmears before tooling joints.

Final Cleauing: After mortar is thorongldy set and cured, clean exposed masonry as follows:

1. Remove large mortar particles by hand with wooden paddles and nonmetallic scrape hoes orchisels.

2. Test cleaning methods on sample wall panel; leave one-ball of panel nncleaned for comparisonpurposes. Obtain Architect's approval of sample cleaning before proceeding with cleaning ofmasom-y.

3. Protect adjaceut stone aud nomnasonry surfaces from contact with cleaner by covering them withliquid strippable masking agent or polyethylene fihn aud waterproofmasking tape.

4. Wet wall surfaces with water before applying cleaners; remove cleaners promptly by rinsingsurfaces thorm•gbly with clear water.


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Clean brick by bncket-and-brnsh hand-cleaning method described in BIA Technical Notes 20.Clean masonry with a proprietary acidic cleaner applied according to manufacturer's writteninstructions.

Clean concrete masonry by cleaning method indicated ha NCMA TEK 8-2A applicable to type ofstain on exposed snrfaces.

Clean stone trim to comply with stone supplier's written instructions.Clean limestone nnits to comply with recommendations in ILl's "Indiana Limestone Handbook."

3.15

A.

MASONRY WASTE DISPOSAL

Salvageable Materials: Unless otherwise indicated, excess masonry materials are Contractor's property.At completion of unit masonry work, remove fi'om Project site.

Excess Masonry Waste: Remove excess clean masonry waste that cannot be ased as fill, as describedabove, and other masonry waste, and legally dispose ofoff Owner's property.

END OF SECTION 042000


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SECTION 042000 - UNIT MASONRY PART 1 - GENERAL 1.1 … · For brick, include slze-variation data...

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Transcript of SECTION 042000 - UNIT MASONRY PART 1 - GENERAL 1.1 … · For brick, include slze-variation data...