HomeMy WebLinkAboutDivision 04 - Masonry.pdfTHE EDUCATION CENTER Project No. 122175.00
AT BETTY FORD ALPINE GARDENS Vail, Colorado
CONCRETE UNIT MASONRY 042200 - 1
SECTION 042200 - CONCRETE UNIT MASONRY
PART 1 - GENERAL
1.1 DEFINITIONS
A. CMU(s): Concrete masonry unit(s).
B. Reinforced Masonry: Masonry containing reinforcing steel in grouted cells.
1.2 ACTION SUBMITTALS
A. Product Data: For each type of product.
B. Shop Drawings: For reinforcing steel. Detail bending, lap lengths, and placement of unit
masonry reinforcing bars. Comply with ACI 315.
C. Samples: For each type and color of the following:
1. Exposed CMUs.
2. Pigmented and colored-aggregate mortar.
1.3 INFORMATIONAL SUBMITTALS
A. Material Certificates: For each type and size of product. For masonry units, include data on
material properties and material test reports substantiating compliance with requirements.
B. Mix Designs: For each type of mortar and grout. Include description of type and proportions of
ingredients.
1. Include test reports for mortar mixes required to comply with property specification. Test
according to ASTM C 109/C 109M for compressive strength, ASTM C 1506 for water
retention, and ASTM C 91/C 91M for air content.
2. Include test reports, according to ASTM C 1019, for grout mixes required to comply with
compressive strength requirement.
1.4 QUALITY ASSURANCE
A. Sample Panels: Build sample panels to verify selections made under Sample submittals and to
demonstrate aesthetic effects. Comply with requirements in Section 014000 "Quality
Requirements" for mockups.
1. Build sample panels for each type of exposed unit masonry construction in sizes
approximately 48 inches (1200 mm) long by 36 inches (900 mm) high by full thickness.
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CONCRETE UNIT MASONRY 042200 - 2
1.5 FIELD CONDITIONS
A. Cold-Weather Requirements: Do not use frozen materials or materials mixed or coated with ice
or frost. Do not build on frozen substrates. Remove and replace unit masonry damaged by frost
or by freezing conditions. Comply with cold-weather construction requirements contained in
TMS 602/ACI 530.1/ASCE 6.
B. Hot-Weather Requirements: Comply with hot-weather construction requirements contained in
TMS 602/ACI 530.1/ASCE 6.
PART 2 - PRODUCTS
2.1 UNIT MASONRY, GENERAL
A. Masonry Standard: Comply with TMS 602/ACI 530.1/ASCE 6, except as modified by
requirements in the Contract Documents.
B. Defective Units: Referenced masonry unit standards may allow a certain percentage of units to
contain chips, cracks, or other defects exceeding limits stated. Do not use units where such
defects are exposed in the completed Work.
2.2 CONCRETE MASONRY UNITS
A. Shapes: Provide shapes indicated and as follows, with exposed surfaces matching exposed faces
of adjacent units unless otherwise indicated.
1. Provide special shapes for lintels, corners, jambs, sashes, movement joints, headers,
bonding, and other special conditions.
B. Integral Water Repellent: Provide units made with integral water repellent.
1. <Double click here to find, evaluate, and insert list of manufacturers and products.>
C. CMUs: ASTM C 90.
1. Unit Compressive Strength: Provide units with minimum average net-area compressive
strength of 2150 psi (14.8 MPa).
2. Density Classification: Normal weight.
D. Decorative CMUs: ASTM C 90.
1. <Double click here to find, evaluate, and insert list of manufacturers and products.>
2. Unit Compressive Strength: Provide units with minimum average net-area compressive
strength of 2150 psi (14.8 MPa).
3. Density Classification: Normal weight.
4. Pattern and Texture:
a. Standard pattern, ground-face finish. Match Architect's samples.
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b. Standard pattern, split-face finish. Match Architect's samples.
2.3 MORTAR AND GROUT MATERIALS
A. Portland Cement: ASTM C 150/C 150M, Type I or II, except Type III may be used for cold-
weather construction. Provide natural color or white cement as required to produce mortar color
indicated.
B. Hydrated Lime: ASTM C 207, Type S.
C. Portland Cement-Lime Mix: Packaged blend of portland cement and hydrated lime containing
no other ingredients.
D. Masonry Cement: ASTM C 91/C 91M.
1. <Double click here to find, evaluate, and insert list of manufacturers and products.>
E. Mortar Pigments: Natural and synthetic iron oxides and chromium oxides, compounded for use
in mortar mixes and complying with ASTM C 979/C 979M. Use only pigments with a record of
satisfactory performance in masonry mortar.
1. <Double click here to find, evaluate, and insert list of manufacturers and products.>
F. Colored Cement Products: Packaged blend made from portland cement and hydrated lime or
masonry cement and mortar pigments, all complying with specified requirements, and
containing no other ingredients.
1. Colored Portland Cement-Lime Mix:
a. <Double click here to find, evaluate, and insert list of manufacturers and
products.>
2. Colored Masonry Cement:
a. <Double click here to find, evaluate, and insert list of manufacturers and
products.>
G. Aggregate for Mortar: ASTM C 144.
1. White-Mortar Aggregates: Natural white sand or crushed white stone.
2. Colored-Mortar Aggregates: Natural sand or crushed stone of color necessary to produce
required mortar color.
H. Aggregate for Grout: ASTM C 404.
I. Cold-Weather Admixture: Nonchloride, noncorrosive, accelerating admixture complying with
ASTM C 494/C 494M, Type C, and recommended by manufacturer for use in masonry mortar
of composition indicated.
1. <Double click here to find, evaluate, and insert list of manufacturers and products.>
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J. Water-Repellent Admixture: Liquid water-repellent mortar admixture intended for use with
CMUs containing integral water repellent from same manufacturer.
1. <Double click here to find, evaluate, and insert list of manufacturers and products.>
K. Water: Potable.
2.4 REINFORCEMENT
A. Uncoated-Steel Reinforcing Bars: ASTM A 615/A 615M, Grade 60 (Grade 420).
B. Reinforcing Bar Positioners: Wire units designed to fit into mortar bed joints spanning masonry
unit cells and to hold reinforcing bars in center of cells. Units are formed from 0.148-inch (3.77-
mm) steel wire, hot-dip galvanized after fabrication. Provide units designed for number of bars
indicated.
1. <Double click here to find, evaluate, and insert list of manufacturers and products.>
C. Masonry-Joint Reinforcement, General: ASTM A 951/A 951M.
1. Interior Walls: Hot-dip galvanized, carbon steel.
2. Exterior Walls: Hot-dip galvanized carbon steel.
3. Wire Size for Side Rods: 0.148-inch (3.77-mm) 0.187-inch (4.76-mm) diameter.
4. Wire Size for Cross Rods: 0.148-inch (3.77-mm) 0.187-inch (4.76-mm) diameter.
5. Spacing of Cross Rods: Not more than 16 inches (407 mm) o.c.
6. Provide in lengths of not less than 10 feet (3 m), with prefabricated corner and tee units.
2.5 TIES AND ANCHORS
A. Materials: Provide ties and anchors specified in this article that are made from materials that
comply with the following unless otherwise indicated:
1. Hot-Dip Galvanized, Carbon-Steel Wire: ASTM A 82/A 82M, with
ASTM A 153/A 153M, Class B-2 coating.
2. Steel Sheet, Galvanized after Fabrication: ASTM A 1008/A 1008M, Commercial Steel,
with ASTM A 153/A 153M, Class B coating.
3. Steel Plates, Shapes, and Bars: ASTM A 36/A 36M.
2.6 EMBEDDED FLASHING MATERIALS
A. Metal Flashing: Provide metal flashing complying with Section 076200 "Sheet Metal Flashing
and Trim" and as follows:
1. Fabricate metal drip edges from stainless steel. Extend at least 3 inches (76 mm) into wall
and 1/2 inch (13 mm) out from wall, with outer edge bent down 30 degrees and hemmed.
2. Fabricate metal sealant stops from stainless steel. Extend at least 3 inches (76 mm) into
wall and out to exterior face of wall. At exterior face of wall, bend metal back on itself
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for 3/4 inch (19 mm) and down into joint 1/4 inch (6 mm) to form a stop for retaining
sealant backer rod.
3. Fabricate metal expansion-joint strips from stainless steel to shapes indicated.
B. Flexible Flashing: Use one of the following unless otherwise indicated:
1. Rubberized-Asphalt Flashing: Composite flashing product consisting of a pliable,
adhesive rubberized-asphalt compound, bonded to a high-density, cross-laminated
polyethylene film to produce an overall thickness of not less than 0.030 inch (0.76 mm)
0.040 inch (1.02 mm).
a. <Double click here to find, evaluate, and insert list of manufacturers and
products.>
2. Butyl Rubber Flashing: Composite, self-adhesive, flashing product consisting of a
pliable, butyl rubber compound, bonded to a high-density polyethylene film, aluminum
foil, or spunbonded polyolefin to produce an overall thickness of not less than 0.030 inch
(0.76 mm) 0.040 inch (1.02 mm).
a. <Double click here to find, evaluate, and insert list of manufacturers and
products.>
3. Elastomeric Thermoplastic Flashing: Composite flashing product consisting of a
polyester-reinforced ethylene interpolymer alloy.
a. <Double click here to find, evaluate, and insert list of manufacturers and
products.>
4. EPDM Flashing: Sheet flashing product made from ethylene-propylene-diene terpolymer,
complying with ASTM D 4637/D 4637M, 0.040 inch (1.0 mm) thick.
a. <Double click here to find, evaluate, and insert list of manufacturers and
products.>
C. Single-Wythe CMU Flashing System: System of CMU cell flashing pans and interlocking CMU
web covers made from UV-resistant, high-density polyethylene. Cell flashing pans have integral
weep spouts designed to be built into mortar bed joints and that extend into the cell to prevent
clogging with mortar.
1. <Double click here to find, evaluate, and insert list of manufacturers and products.>
D. Solder and Sealants for Sheet Metal Flashings: As specified in Section 076200 "Sheet Metal
Flashing and Trim."
E. Adhesives, Primers, and Seam Tapes for Flashings: Flashing manufacturer's standard products
or products recommended by flashing manufacturer for bonding flashing sheets to each other
and to substrates.
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2.7 MISCELLANEOUS MASONRY ACCESSORIES
A. Compressible Filler: Premolded filler strips complying with ASTM D 1056, Grade 2A1;
compressible up to 35 percent; of width and thickness indicated; formulated from neoprene
urethane or PVC.
B. Preformed Control-Joint Gaskets: Made from styrene-butadiene-rubber compound, complying
with ASTM D 2000, Designation M2AA-805 or PVC, complying with ASTM D 2287,
Type PVC-65406 and designed to fit standard sash block and to maintain lateral stability in
masonry wall; size and configuration as indicated.
C. Bond-Breaker Strips: Asphalt-saturated felt complying with ASTM D 226/D 226M, Type I
(No. 15 asphalt felt).
2.8 MORTAR AND GROUT MIXES
A. General: Do not use admixtures, including pigments, air-entraining agents, accelerators,
retarders, water-repellent agents, antifreeze compounds, or other admixtures unless otherwise
indicated.
1. Do not use calcium chloride in mortar or grout.
2. Use portland cement-lime or masonry cement mortar.
3. Add cold-weather admixture (if used) at same rate for all mortar that will be exposed to
view, regardless of weather conditions, to ensure that mortar color is consistent.
B. Preblended, Dry Mortar Mix: Furnish dry mortar ingredients in form of a preblended mix.
Measure quantities by weight to ensure accurate proportions, and thoroughly blend ingredients
before delivering to Project site.
C. Mortar for Unit Masonry: Comply with ASTM C 270, Property Specification. Provide the
following types of mortar for applications stated unless another type is indicated.
1. For masonry below grade or in contact with earth, use Type M.
2. For reinforced masonry, use Type S.
3. For mortar parge coats, use Type S.
D. Pigmented Mortar: Use colored cement product or select and proportion pigments with other
ingredients to produce color required. Do not add pigments to colored cement products.
1. Pigments shall not exceed 10 percent of portland cement by weight.
2. Pigments shall not exceed 5 percent of masonry cement by weight.
3. Application: Use pigmented mortar for exposed mortar joints with the following units:
a. Decorative CMUs.
E. Colored-Aggregate Mortar: Produce required mortar color by using colored aggregates and
natural color or white cement as necessary to produce required mortar color.
1. Application: Use colored-aggregate mortar for exposed mortar joints with the following
units:
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CONCRETE UNIT MASONRY 042200 - 7
a. Decorative CMUs.
F. Grout for Unit Masonry: Comply with ASTM C 476.
1. Use grout of type indicated or, if not otherwise indicated, of type (fine or coarse) that will
comply with TMS 602/ACI 530.1/ASCE 6 for dimensions of grout spaces and pour
height.
2. Proportion grout in accordance with ASTM C 476, Table 1 or paragraph 4.2.2 for
specified 28-day compressive strength indicated, but not less than 2000 psi (14 MPa).
3. Provide grout with a slump of 8 to 11 inches (200 to 280 mm) as measured according to
ASTM C 143/C 143M.
PART 3 - EXECUTION
3.1 INSTALLATION, GENERAL
A. Use full-size units without cutting if possible. If cutting is required to provide a continuous
pattern or to fit adjoining construction, cut units with motor-driven saws; provide clean, sharp,
unchipped edges. Allow units to dry before laying unless wetting of units is specified. Install cut
units with cut surfaces and, where possible, cut edges concealed.
3.2 TOLERANCES
A. Dimensions and Locations of Elements:
1. For dimensions in cross section or elevation, do not vary by more than plus 1/2 inch (12
mm) or minus 1/4 inch (6 mm).
2. For location of elements in plan, do not vary from that indicated by more than plus or
minus 1/2 inch (12 mm).
3. For location of elements in elevation, do not vary from that indicated by more than plus
or minus 1/4 inch (6 mm) in a story height or 1/2 inch (12 mm) total.
B. Lines and Levels:
1. For bed joints and top surfaces of bearing walls, do not vary from level by more than 1/4
inch in 10 feet (6 mm in 3 m), or 1/2-inch (12-mm) maximum.
2. For vertical lines and surfaces, do not vary from plumb by more than 1/4 inch in 10 feet
(6 mm in 3 m), 3/8 inch in 20 feet (9 mm in 6 m), or 1/2-inch (12-mm) maximum.
3. For lines and surfaces, do not vary from straight by more than 1/4 inch in 10 feet (6 mm
in 3 m), 3/8 inch in 20 feet (9 mm in 6 m), or 1/2-inch (12-mm) maximum.
C. Joints:
1. For bed joints, do not vary from thickness indicated by more than plus or minus 1/8 inch
(3 mm), with a maximum thickness limited to 1/2 inch (12 mm).
2. For head and collar joints, do not vary from thickness indicated by more than plus 3/8
inch (9 mm) or minus 1/4 inch (6 mm).
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3. For exposed head joints, do not vary from thickness indicated by more than plus or minus
1/8 inch (3 mm).
3.3 LAYING MASONRY WALLS
A. Lay out walls in advance for accurate spacing of surface bond patterns with uniform joint
thicknesses and for accurate location of openings, movement-type joints, returns, and offsets.
Avoid using less-than-half-size units, particularly at corners, jambs, and, where possible, at
other locations.
B. Bond Pattern for Exposed Masonry: Unless otherwise indicated, lay exposed masonry in
running bond; do not use units with less-than-nominal 4-inch (100-mm) horizontal face
dimensions at corners or jambs.
C. Built-in Work: As construction progresses, build in items specified in this and other Sections.
Fill in solidly with masonry around built-in items.
D. Fill space between steel frames and masonry solidly with mortar unless otherwise indicated.
E. Where built-in items are to be embedded in cores of hollow masonry units, place a layer of
metal lath, wire mesh, or plastic mesh in the joint below, and rod mortar or grout into core.
3.4 MORTAR BEDDING AND JOINTING
A. Lay hollow CMUs as follows:
1. Bed face shells in mortar and make head joints of depth equal to bed joints.
2. Bed webs in mortar in all courses of piers, columns, and pilasters.
3. Bed webs in mortar in grouted masonry, including starting course on footings.
4. Fully bed entire units, including areas under cells, at starting course on footings where
cells are not grouted.
B. Tool exposed joints slightly concave when thumbprint hard, using a jointer larger than joint
thickness unless otherwise indicated.
C. Cut joints flush for masonry walls to receive plaster or other direct-applied finishes (other than
paint) unless otherwise indicated.
3.5 MASONRY-JOINT REINFORCEMENT
A. General: Install entire length of longitudinal side rods in mortar with a minimum cover of 5/8
inch (16 mm) on exterior side of walls, 1/2 inch (13 mm) elsewhere. Lap reinforcement a
minimum of 6 inches (150 mm).
1. Space reinforcement not more than 16 inches (406 mm) o.c.
B. Interrupt joint reinforcement at control and expansion joints unless otherwise indicated.
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3.6 FLASHING
A. General: Install embedded flashing at ledges and other obstructions to downward flow of water
in wall where indicated.
B. Install flashing as follows unless otherwise indicated:
1. Prepare masonry surfaces so they are smooth and free from projections that could
puncture flashing. Where flashing is within mortar joint, place through-wall flashing on
sloping bed of mortar and cover with mortar. Before covering with mortar, seal
penetrations in flashing with adhesive, sealant, or tape as recommended by flashing
manufacturer.
2. Install metal drip edges beneath flexible flashing at exterior face of wall. Stop flexible
flashing 1/2 inch (13 mm) back from outside face of wall, and adhere flexible flashing to
top of metal drip edge.
3. Install metal flashing termination beneath flexible flashing at exterior face of wall. Stop
flexible flashing 1/2 inch (13 mm) back from outside face of wall, and adhere flexible
flashing to top of metal flashing termination.
C. Install single-wythe CMU flashing system in bed joints of CMU walls where indicated to
comply with manufacturer's written instructions. Install CMU cell pans with upturned edges
located below face shells and webs of CMUs above and with weep spouts aligned with face of
wall. Install CMU web covers so that they cover upturned edges of CMU cell pans at CMU
webs and extend from face shell to face shell.
3.7 REINFORCED UNIT MASONRY INSTALLATION
A. Placing Reinforcement: Comply with requirements in TMS 602/ACI 530.1/ASCE 6.
B. Grouting: Do not place grout until entire height of masonry to be grouted has attained enough
strength to resist grout pressure.
1. Comply with requirements in TMS 602/ACI 530.1/ASCE 6 for cleanouts and for grout
placement, including minimum grout space and maximum pour height.
2. Limit height of vertical grout pours to not more than 60 inches (1520 mm) 12.67 ft. (3.86
m).
3.8 FIELD QUALITY CONTROL
A. Testing and Inspecting: Owner will engage special inspectors to perform tests and inspections
and prepare reports. Allow inspectors access to scaffolding and work areas as needed to perform
tests and inspections. Retesting of materials that fail to comply with specified requirements shall
be done at Contractor's expense.
B. Inspections: Special inspections according to Level B in TMS 402/ACI 530/ASCE 5.
1. Begin masonry construction only after inspectors have verified proportions of site-
prepared mortar.
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2. Place grout only after inspectors have verified compliance of grout spaces and of grades,
sizes, and locations of reinforcement.
3. Place grout only after inspectors have verified proportions of site-prepared grout.
C. Testing Prior to Construction: One set of tests.
D. Testing Frequency: One set of tests for each 5000 sq. ft. (464 sq. m) of wall area or portion
thereof.
E. Concrete Masonry Unit Test: For each type of unit provided, according to ASTM C 140 for
compressive strength.
F. Mortar Aggregate Ratio Test (Proportion Specification): For each mix provided, according to
ASTM C 780.
G. Mortar Test (Property Specification): For each mix provided, according to ASTM C 780. Test
mortar for compressive strength.
H. Grout Test (Compressive Strength): For each mix provided, according to ASTM C 1019.
I. Prism Test: For each type of construction provided, according to ASTM C 1314 at 28 days.
3.9 PARGING
A. Parge exterior faces of below-grade masonry walls, where indicated, in two uniform coats to a
total thickness of 3/4 inch (19 mm). Dampen wall before applying first coat, and scarify first
coat to ensure full bond to subsequent coat.
B. Use a steel-trowel finish to produce a smooth, flat, dense surface with a maximum surface
variation of 1/8 inch per foot (3 mm per 300 mm). Form a wash at top of parging and a cove at
bottom.
C. Damp-cure parging for at least 24 hours and protect parging until cured.
3.10 REPAIRING, POINTING, AND CLEANING
A. In-Progress Cleaning: Clean unit masonry as work progresses by dry brushing to remove mortar
fins and smears before tooling joints.
B. Final Cleaning: After mortar is thoroughly set and cured, clean exposed masonry as follows:
1. Test cleaning methods on sample wall panel; leave one-half of panel uncleaned for
comparison purposes.
2. Clean concrete masonry by applicable cleaning methods indicated in NCMA TEK 8-4A.
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3.11 MASONRY WASTE DISPOSAL
A. Waste Disposal as Fill Material: Dispose of clean masonry waste, including excess or soil-
contaminated sand, waste mortar, and broken masonry units, by crushing and mixing with fill
material as fill is placed.
1. Do not dispose of masonry waste as fill within 18 inches (450 mm) of finished grade.
B. Excess Masonry Waste: Remove excess clean masonry waste that cannot be used as fill, as
described above or recycled, and other masonry waste, and legally dispose of off Owner's
property.
END OF SECTION 042200
THE EDUCATION CENTER Project No. 122175.00
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ANCHORED STONE MASONRY VENEER 044313.13 - 1
SECTION 044313.13 - ANCHORED STONE MASONRY VENEER
PART 1 - GENERAL
1.1 SUMMARY
A. Section Includes:
1. Stone masonry anchored to concrete backup.
2. Stone masonry anchored to wood framing and sheathing.
1.2 ACTION SUBMITTALS
A. Product Data: For each variety of stone, stone accessory, and manufactured product.
B. Samples:
1. For each stone type indicated.
C. Mockups:
1. Construct mockup panel on site for Architect’s evaluation and approval prior to installing
stone veneer. Mockup panel shall be 4 feet by 4 feet minimum in size.
1.3 FIELD CONDITIONS
A. Protection of Stone Masonry: During construction, cover tops of walls, projections, and sills
with waterproof sheeting at end of each day's work.
B. Cold-Weather Requirements: Do not use frozen materials or materials mixed or coated with ice
or frost. Do not build on frozen substrates. Comply with cold-weather construction
requirements contained in ACI 530.1/ASCE 6/TMS 602.
1. Cold-Weather Cleaning: Use liquid cleaning methods only when air temperature is 40
deg F (4 deg C) and above and will remain so until masonry has dried.
C. Hot-Weather Requirements: Comply with hot-weather construction requirements contained in
ACI 530.1/ASCE 6/TMS 602.
PART 2 - PRODUCTS
2.1 QUARTZ-BASED STONE
A. Quartz-Based Stone: Comply with ASTM C 616, Classification II Quartzitic Sandstone or
III Quartzite.
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ANCHORED STONE MASONRY VENEER 044313.13 - 2
1. Products: Subject to compliance with requirements, provide the following:
2. Building Stone Veneer: 4-inch thick (nominal) stone veneer by Telluride Stone
Company, “Aspen Blend.”
3. Stone Caps: 2- or 4-inch (nominal) thick stone caps by Telluride Stone Company,
“Aspen Blend.” Provide cap thickness as indicated on Drawings.
2.2 MORTAR MATERIALS
A. Portland Cement: ASTM C 150, Type I or Type II, except Type III may be used for cold-
weather construction; natural color or white cement may be used as required to produce mortar
color indicated.
1. Low-Alkali Cement: Not more than 0.60 percent total alkali when tested according to
ASTM C 114.
B. Hydrated Lime: ASTM C 207, Type S.
C. Masonry Cement: ASTM C 91.
1. Products: Subject to compliance with requirements, available products that may be
incorporated into the Work include, but are not limited to, the following:
a. Cemex S.A.B. de C.V.; Citadel Type S or Dixie Type S.
b. Lafarge North America Inc.; Magnolia Masonry Cement or Lafarge Masonry
Cement.
c. Lehigh Cement Company; Lehigh Masonry Cement.
d. National Cement Company, Inc.; Coosa Masonry Cement.
D. Aggregate: ASTM C 144 and as follows:
1. For pointing mortar, use aggregate graded with 100 percent passing Black sieve.
2. White Aggregates: Natural white sand or ground white stone.
3. Colored Aggregates: Natural-colored sand or ground marble, granite, or other sound
stone; of color necessary to produce required mortar color.
E. Water: Potable.
2.3 VENEER ANCHORS
A. Materials:
1. Hot-Dip Galvanized, Carbon-Steel Wire: ASTM A 82/A 82M; with
ASTM A 153/A 153M, Class B-2.
2. Hot-Dip Galvanized-Steel Sheet: ASTM A 1008/A 1008M, cold-rolled, carbon-steel
sheet, hot-dip galvanized after fabrication to comply with ASTM A 153/A 153M,
Class B-2.
B. Corrugated-Metal Veneer Anchors: Not less than 0.030-inch- (0.76-mm-) thick by 7/8-inch-
(22-mm-) wide hot-dip galvanized-steel sheet with corrugations having a wavelength of 0.3 to
THE EDUCATION CENTER Project No. 122175.00
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ANCHORED STONE MASONRY VENEER 044313.13 - 3
0.5 inch (7.6 to 13 mm) and an amplitude of 0.06 to 0.10 inch (1.5 to 2.5 mm). For use with
stone veneer with concrete wall backing.
C. Adjustable, Screw-Attached Veneer Anchors: Units consisting of a wire tie section and a metal
anchor section that allow vertical adjustment but resist tension and compression forces
perpendicular to plane of wall, for attachment over sheathing to wood studs, and as follows:
1. Products: Subject to compliance with requirements, provide one of the following:
a. Dayton Superior Corporation, Dur-O-Wal Division; D/A 213 or D/A 210 with
D/A 700-708.
b. Heckmann Building Products Inc.; 315-D with 316 or Pos-I-Tie.
2. Structural Performance Characteristics: Capable of withstanding a 100-lbf (445-N) load
in both tension and compression without deforming or developing play in excess of 0.05
inch (1.3 mm).
3. Fabricate sheet metal anchor sections and other sheet metal parts from 0.067-inch- (1.7-
mm-) thick, steel sheet, galvanized after fabrication.
4. Wire Ties: Triangular-, rectangular-, or T-shaped wire ties fabricated from 0.188-inch-
(4.8-mm-) hot-dip galvanized steel wire.
2.4 EMBEDDED FLASHING MATERIALS
A. Metal Flashing: Provide metal flashing, where flashing is exposed or partly exposed and where
indicated, complying with Section 076200 "Sheet Metal Flashing and Trim" and as follows:
1. Stainless Steel: ASTM A 240/A 240M, Type 304, 0.016 inch (0.4 mm) thick.
2.5 MISCELLANEOUS MASONRY ACCESSORIES
A. Asphalt Dampproofing: Cut-back asphalt complying with ASTM D 4479, Type I or asphalt
emulsion complying with ASTM D 1227, Type III or Type IV.
B. Weep/Vent Products: Use one of the following unless otherwise indicated:
1. Wicking Material: Absorbent rope, made from cotton or UV-resistant synthetic fiber, 1/4
to 3/8 inch (6 to 10 mm) in diameter, in length required to produce 2-inch (50-mm)
exposure on exterior and 18 inches (450 mm) in cavity behind stone masonry. Use only
for weeps.
2. Round Plastic Tubing: Medium-density polyethylene, 3/8-inch (10-mm) OD by
thickness of stone masonry.
C. Cavity Drainage Material: Free-draining mesh, made from polymer strands that will not
degrade within the wall cavity.
1. Products: Subject to compliance with requirements, available products that may be
incorporated into the Work include, but are not limited to, the following:
a. Advanced Building Products Inc.; Mortar Break or Mortar Break II.
b. CavClear/Archovations, Inc.; CavClear Masonry Mat.
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c. Dayton Superior Corporation, Dur-O-Wal Division; Polytite MortarStop.
d. Mortar Net USA, Ltd.; Mortar Net.
2. Provide one of the following configurations:
a. Sheets or strips not less than 3/4 inch (19 mm) thick and installed to full height of
cavity with additional strips 4 inches (100 mm) high at weep holes and thick
enough to fill entire depth of cavity and prevent weep holes from being clogged
with mortar.
2.6 MASONRY CLEANERS
A. Proprietary Acidic Cleaner: Manufacturer's standard-strength cleaner designed for removing
mortar and grout stains, efflorescence, and other new construction stains from stone masonry
surfaces without discoloring or damaging masonry surfaces; expressly approved for intended
use by cleaner manufacturer and stone producer.
1. Manufacturers: Subject to compliance with requirements, available manufacturers
offering products that may be incorporated into the Work include, but are not limited to,
the following:
a. Diedrich Technologies, Inc.
b. Dominion Restoration Products.
c. EaCo Chem, Inc.
d. Hydrochemical Techniques, Inc.
e. Prosoco, Inc.
2.7 FABRICATION
A. Cut, Split, or Select stone to produce pieces of thickness, size, and shape indicated, including
details on Drawings.
B. Thickness of Stone: Provide thickness indicated, but not less than the following:
1. Stone Veneer Thickness: 4 inches (100 mm) plus or minus 1/2 inch (13 mm). Thickness
does not include projection of pitched faces.
2. Stone Cap Thickness: 2- or 4-inches (50 - 100 mm) plus or minus 1/4 inch (6 mm).
Provide stone cap thicknesses as indicated on the Drawings.
C. Shape stone for type of masonry (pattern) as follows:
1. Coursed ledge stone with “drystack” appearance.
D. Finish exposed stone faces and edges to comply with requirements indicated for finish and to
match approved samples.
1. Finish for Stone Veneer: Natural cleft.
2. Finish for Stone Caps: Natural cleft.
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2.8 MORTAR MIXES
A. General: Do not use admixtures unless otherwise indicated.
1. Do not use calcium chloride.
2. Use portland cement-lime mortar unless otherwise indicated.
3. Mixing Pointing Mortar: Thoroughly mix cementitious and aggregate materials together
before adding water. Then mix again, adding only enough water to produce a damp,
unworkable mix that will retain its form when pressed into a ball. Maintain mortar in this
dampened condition for one to two hours. Add remaining water in small portions until
mortar reaches required consistency. Use mortar within 30 minutes of final mixing; do
not retemper or use partially hardened material.
B. Mortar for Stone Masonry: Comply with ASTM C 270, Proportion Specification.
1. Mortar for Setting Stone: Type S.
2. Mortar for Pointing Stone: Type N.
PART 3 - EXECUTION
3.1 PREPARATION
A. Accurately mark stud centerlines on face of weather-resistant sheathing paper before beginning
stone installation.
B. Coat concrete and unit masonry backup with asphalt dampproofing.
3.2 SETTING OF STONE MASONRY, GENERAL
A. Perform necessary field cutting and trimming as stone is set.
1. Use hammer and chisel to split stone that is fabricated with split surfaces.
2. Pitch face at field-split edges as needed to match stones that are not field split.
B. Sort stone before it is placed in wall to remove stone that does not comply with requirements
relating to aesthetic effects, physical properties, or fabrication, or that is otherwise unsuitable
for intended use.
C. Arrange stones with color variations uniformly dispersed for an evenly blended appearance. As
stone veneer is stacked, larger stones (face dimensions) shall generally be placed near bottoms
of walls, and smaller stones placed near tops of walls. Work that exhibits poorly-mixed stone
sizes will be rejected.
D. Maintain uniform joint widths except for variations due to different stone sizes and where minor
variations are required to maintain bond alignment if any.
E. Arrange stones in ledgestone pattern with joint widths within tolerances indicated. Insert small
stones into spaces between larger stones as needed to produce joints as uniform in width as
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practical. Work stones as required to achieved desired appearance and avoid excessive use of
“cheater” stones to fill small gaps.
F. Provide sealant joints of widths and at locations indicated.
1. Keep sealant joints free of mortar and other rigid materials.
2. Sealing joints is specified in Section 079200 "Joint Sealants."
G. Install embedded flashing and weep holes at shelf angles, lintels, ledges, other obstructions to
downward flow of water in wall, and where indicated.
1. At stud-framed walls, extend flashing through stone masonry, up sheathing face at least
12 inches (300 mm), and behind weather barrier.
2. At concrete backing, extend flashing through stone masonry, turned up a minimum of 6
inches (150 mm), and insert in reglet.
3. At concrete unit masonry backing
4. At lintels and shelf angles, extend flashing full length of angles but not less than 6 inches
(150 mm) into masonry at each end.
5. At sills, extend flashing not less than 4 inches (100 mm) at ends.
6. At ends of head and sill flashing, turn up not less than 2 inches (50 mm) to form end
dams.
7. Extend sheet metal flashing 1/2 inch (13 mm) beyond masonry face at exterior, and turn
flashing down to form a drip.
8. Install metal drip edges beneath flexible flashing at exterior wall face. Stop flexible
flashing 1/2 inch (13 mm) back from exterior wall face and adhere flexible flashing to top
of metal drip edge.
9. Install metal flashing termination beneath flexible flashing at exterior wall face. Stop
flexible flashing 1/2 inch (13 mm) back from exterior wall face and adhere flexible
flashing to top of metal flashing termination.
10. Cut flexible flashing flush with wall face after completing masonry wall construction.
H. Place weep holes and vents in joints where moisture may accumulate, including at base of
cavity walls, above shelf angles, and at flashing.
1. Use wicking material or round plastic tubing to form weep holes at bottoms of stone
veneer walls.
2. Space weep holes 24 inches (600 mm) o.c.
3. Trim wicking material used in weep holes flush with exterior wall face after mortar has
set.
3.3 INSTALLATION OF ANCHORED STONE MASONRY
A. Anchor stone masonry to concrete with corrugated-metal veneer anchors unless otherwise
indicated. Secure anchors by using power actuated fasteners to concrete.
B. Anchor stone masonry to stud framing with adjustable, screw-attached veneer anchors unless
otherwise indicated. Fasten anchors through sheathing to framing with two screws.
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C. Embed veneer anchors in mortar joints of stone masonry at least halfway, but not less than 1-1/2
inches (38 mm), through stone masonry and with at least a 5/8-inch (16-mm) cover on exterior
face.
D. Set stone in full bed of mortar with full head joints unless otherwise indicated. Build anchors
into mortar joints as stone is set.
E. Fill collar joint (space between back of stone masonry and weather-resistant sheathing paper)
with mortar as stone is set.
F. Provide 1-inch (25-mm) cavity between stone masonry and wood stud backup construction.
Keep cavity free of mortar droppings and debris.
G. Unless “drystack” joints are indicated, rake out joints for pointing with mortar to depth of not
less than 1/2 inch (13 mm) before setting mortar has hardened.
3.4 POINTING
A. Prepare stone-joint surfaces for pointing with mortar by removing dust and mortar particles.
Where setting mortar was removed to depths greater than surrounding areas, apply pointing
mortar in layers not more than 3/8 inch (10 mm) deep until a uniform depth is formed.
B. Point stone joints by placing and compacting pointing mortar in layers of not more than 3/8 inch
(10 mm) deep. Compact each layer thoroughly and allow to it become thumbprint hard before
applying next layer.
C. Tool joints, when pointing mortar is thumbprint hard, with a smooth jointing tool to produce the
following joint profile:
1. Joint Profile: “Drystack” joints.
3.5 ADJUSTING AND CLEANING
A. In-Progress Cleaning: Clean stone masonry as work progresses. Remove mortar fins and
smears before tooling joints.
B. Final Cleaning: After mortar is thoroughly set and cured, clean stone masonry as follows:
1. Remove large mortar particles by hand with wooden paddles and nonmetallic scrape hoes
or chisels.
2. Test cleaning methods on mockup; leave one-half of panel uncleaned for comparison
purposes. Obtain Architect's approval of sample cleaning before cleaning stone masonry.
3. Protect adjacent stone and nonmasonry surfaces from contact with cleaner by covering
them with liquid strippable masking agent, polyethylene film, or waterproof masking
tape.
4. Wet wall surfaces with water before applying cleaner; remove cleaner promptly by
rinsing thoroughly with clear water.
5. Clean stone masonry with proprietary acidic cleaner applied according to manufacturer's
written instructions.
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END OF SECTION 044313.13