HomeMy WebLinkAbout04 MasonryPark Grove - Cayuga Medical Center
MEDICAL OFFICE BUILDING
Cayuga Park, Ithaca, NY 14850
HOLT Project No. 2018089
UNIT MASONRY 042000 - 1
SECTION 042000 - UNIT MASONRY
PART 1 - GENERAL
1.1 SUMMARY
A. Section Includes:
1. Concrete masonry units.
2. Brick.
3. Adjustable brickwork support system.
4. Mortar and grout materials.
5. Reinforcement.
6. Ties and anchors.
7. Embedded flashing.
8. Accessories.
9. Mortar and grout mixes.
B. Products Installed but not Furnished under This Section:
1. Cast-stone trim in unit masonry.
2. Steel lintels in unit masonry.
3. Steel shelf angles for supporting unit masonry.
C. Related Requirements:
1. Section 072100 "Thermal Insulation" for cavity wall insulation.
2. Section 076200 "Sheet Metal Flashing and Trim" for exposed sheet metal flashing.
1.2 DEFINITIONS
A. CMU(s): Concrete masonry unit(s).
B. Reinforced Masonry: Masonry containing reinforcing steel in grouted cells.
1.3 PREINSTALLATION MEETINGS
A. Preinstallation Conference: Conduct conference at Project site.
1.4 ACTION SUBMITTALS
A. Product Data: For each type of product.
B. Shop Drawings: For the following:
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MEDICAL OFFICE BUILDING
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HOLT Project No. 2018089
UNIT MASONRY 042000 - 2
1. Adjustable Brickwork Support System: Indicate component profiles, sizes, connection
attachments, anchorage, size and type of fasteners, and accessories, signed and sealed by
a Professional Engineer registered in the State of New York.
C. Samples for Initial Selection:
1. Decorative CMUs, in the form of small-scale units.
2. Clay face brick.
3. Colored mortar.
4. Weep/cavity vents.
D. Samples for Verification: For each type and color of the following:
1. Decorative CMUs.
2. Clay face brick.
3. Special brick shapes.
4. Pigmented and colored-aggregate mortar. Make Samples using same sand and mortar
ingredients to be used on Project.
5. Weep/cavity vents.
6. Cavity drainage material.
7. Accessories embedded in masonry.
E. Sustainable Design Submittals:
1. Environmental Product Declaration (EPD): For each product.
1.5 MOCKUPS
A. Wall Mockups: Build mockups to demonstrate aesthetic effects and to set quality standards for
installation.
1. Build mockup as indicated on Drawings.
2. Approval of mockups does not constitute approval of deviations from the Contract
Documents contained in mockups unless Architect specifically approves such deviations
by Change Order.
3. Subject to compliance with requirements, approved mockups may become part of the
completed Work if undisturbed at time of Substantial Completion.
1.6 DELIVERY, STORAGE, AND HANDLING
A. Store masonry units on elevated platforms in a dry location. If units are not stored in an
enclosed location, cover tops and sides of stacks with waterproof sheeting, securely tied. If
units become wet, do not install until they are dry.
B. Store cementitious materials on elevated platforms, under cover, and in a dry location. Do not
use cementitious materials that have become damp.
C. Store aggregates where grading and other required characteristics can be maintained and
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MEDICAL OFFICE BUILDING
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HOLT Project No. 2018089
UNIT MASONRY 042000 - 3
contamination avoided.
D. Deliver preblended, dry mortar mix in moisture-resistant containers. Store preblended, dry
mortar mix in delivery containers on elevated platforms in a dry location or in covered
weatherproof dispensing silos.
E. Store masonry accessories, including metal items, to prevent corrosion and accumulation of dirt
and oil.
1.7 FIELD CONDITIONS
A. Protection of Masonry: During construction, cover tops of walls, projections, and sills with
waterproof sheeting at end of each day's work. Cover partially completed masonry when
construction is not in progress.
1. Extend cover a minimum of 24 inches down both sides of walls, and hold cover securely
in place.
B. 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.
C. Stain Prevention: Prevent grout, mortar, and soil from staining the face of masonry to be left
exposed or painted. Immediately remove grout, mortar, and soil that come in contact with such
masonry.
1. Protect base of walls from rain-splashed mud and from mortar splatter by spreading
coverings on ground and over wall surface.
2. Protect sills, ledges, and projections from mortar droppings.
3. Protect surfaces of window and door frames, as well as similar products with painted and
integral finishes, from mortar droppings.
4. Turn scaffold boards near the wall on edge at the end of each day to prevent rain from
splashing mortar and dirt onto completed masonry.
D. 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.
1. Cold-Weather Cleaning: Use liquid cleaning methods only when air temperature is 40
deg F and higher and will remain so until masonry has dried, but not less than seven days
after completing cleaning.
E. Hot-Weather Requirements: Comply with hot-weather construction requirements contained in
TMS 602.
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MEDICAL OFFICE BUILDING
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HOLT Project No. 2018089
UNIT MASONRY 042000 - 4
PART 2 - PRODUCTS
2.1 PERFORMANCE REQUIREMENTS
A. Seismic Performance: Masonry to withstand the effects of earthquake motions determined in
accordance with ASCE/SEI 7.
B. Provide unit masonry that develops indicated net-area compressive strengths at 28 days.
1. Determine net-area compressive strength of masonry from average net-area compressive
strengths of masonry units and mortar types (unit-strength method) in accordance with
TMS 602.
2. Determine net-area compressive strength of masonry by testing masonry prisms in
accordance with ASTM C1314.
2.2 UNIT MASONRY, GENERAL
A. Masonry Standard: Comply with TMS 602, 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 and will be within 20 ft. vertically and horizontally
of a walking surface.
2.3 CONCRETE MASONRY UNITS
A. Regional Materials: CMUs shall be manufactured within 100 miles of Project site from
aggregates and cement that have been extracted, harvested, or recovered, as well as
manufactured, within 100 miles of Project site.
B. CMUs: ASTM C90, normal weight.
1. Unit Compressive Strength: Provide units with minimum average net-area compressive
strength of 2800 psi.
2. Size (Width): Manufactured to dimensions 3/8 inch less than nominal dimensions.
C. Decorative CMUs: ASTM C90, normal weight.
1. Manufacturers: Subject to compliance with requirements, provide products by the
following:
a. Shouldice Designer Stone.
2. Size (Width): As indicated on Drawings.
3. Colors: As indicated on Drawings.
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MEDICAL OFFICE BUILDING
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HOLT Project No. 2018089
UNIT MASONRY 042000 - 5
2.4 BRICK
A. Regional Materials: Brick shall be manufactured within 100 miles of Project site from materials
that have been extracted, harvested, or recovered, as well as manufactured, within 100 miles of
Project site.
B. General: Provide shapes indicated and as follows, with exposed surfaces matching finish and
color of exposed faces of adjacent units:
1. For ends of sills and caps and for similar applications that would otherwise expose
unfinished brick surfaces, provide units without cores or frogs and with exposed surfaces
finished.
2. Provide special shapes for applications where shapes produced by sawing would result in
sawed surfaces being exposed to view.
C. Clay Face Brick: Facing brick complying with ASTM C216, Grade SW, Type FBS.
1. Manufacturers: Subject to compliance with requirements, provide products by the
following:
a. Belden Brick Company (The).
b. Endicott Clay Products Co.
2. Unit Compressive Strength: Provide units with minimum average net-area compressive
strength of 3350 psi.
3. Initial Rate of Absorption: Less than 30 g/30 sq. in. per minute when tested in accordance
with ASTM C67/C67M.
4. Efflorescence: Provide brick that has been tested in accordance with ASTM C67/C67M
and is rated "not effloresced."
5. Surface Coating: Brick with colors or textures produced by application of coatings shall
withstand 50 cycles of freezing and thawing in accordance with ASTM C67/C67M with
no observable difference in the applied finish when viewed from 10 ft. or shall have a
history of successful use in Project's area.
6. Size (Actual Dimensions): 3-5/8 inches wide by 2-1/4 inches high by 7-5/8 inches long.
7. Application: Use where brick is exposed unless otherwise indicated.
8. Color and Texture: As indicated on Drawings.
2.5 ADJUSTABLE BRICKWORK SUPPORT SYSTEM
A. Manufacturers: Subject to compliance with requirements, manufacturers whose products may
be incorporated into the Work, include the following:
1. Halfen USA, Inc.
B. Adjustable Brickwork Support System Assembly: System shall resist loads as follows:
1. Brick Veneer Height: As indicated on Drawings.
2. Designed per load conditions.
3. Projecting Leg Thickness: As indicated on Drawings.
4. Not broken at vertical joints.
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HOLT Project No. 2018089
UNIT MASONRY 042000 - 6
C. Materials:
1. Adjustable Bracket Components: Carbon steel, ASTM A36 with hot-dip galvanized
finish, ASTM A123.
2.6 MORTAR AND GROUT MATERIALS
A. Regional Materials: Aggregate for mortar and grout, cement, and lime shall be manufactured
within 100 miles of Project site from materials that have been extracted, harvested, or
recovered, as well as manufactured, within 100 miles of Project site.
B. Portland Cement: ASTM C150/C150M, 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.
1. Alkali content will not be more than 0.1 percent when tested in accordance with ASTM
C114.
C. Hydrated Lime: ASTM C207, Type S.
D. Portland Cement-Lime Mix: Packaged blend of portland cement and hydrated lime containing
no other ingredients.
E. Mortar Pigments: Natural and synthetic iron oxides and chromium oxides, compounded for use
in mortar mixes and complying with ASTM C979/C979M. Use only pigments with a record of
satisfactory performance in masonry mortar.
1. Manufacturers: Subject to compliance with requirements, provide products by one of the
following:
a. Davis Colors.
b. Euclid Chemical Company (The); an RPM company.
c. Lanxess Corporation.
d. Solomon Colors, Inc.
e. Stone Creek Products.
F. Aggregate for Mortar: ASTM C144.
1. For mortar that is exposed to view, use washed aggregate consisting of natural sand or
crushed stone.
2. For joints less than 1/4 inch thick, use aggregate graded with 100 percent passing the No.
16 sieve.
3. White-Mortar Aggregates: Natural white sand or crushed white stone.
G. Aggregate for Grout: ASTM C404.
H. Cold-Weather Admixture: Nonchloride, noncorrosive, accelerating admixture complying with
ASTM C494/C494M, Type C, and recommended by manufacturer for use in masonry mortar of
composition indicated.
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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. Euclid Chemical Company (The); an RPM company.
b. GCP Applied Technologies Inc.
I. Water: Potable.
2.7 REINFORCEMENT
A. Uncoated-Steel Reinforcing Bars: ASTM A615/A615M or ASTM A996/A996M, Grade 60.
B. Masonry-Joint Reinforcement, General: ASTM A951/A951M.
1. Interior Walls: Hot-dip galvanized carbon steel.
2. Exterior Walls: Hot-dip galvanized carbon steel.
3. Wire Size for Side Rods: 0.187-inch diameter.
4. Wire Size for Cross Rods: 0.187-inch diameter.
5. Wire Size for Veneer Ties: 0.187-inch diameter.
6. Spacing of Cross Rods, Tabs, and Cross Ties: Not more than 16 inches o.c.
7. Provide in lengths of not less than 10 ft., with prefabricated corner and tee units.
C. Masonry-Joint Reinforcement for Single-Wythe Masonry: Ladder or truss type with single pair
of side rods.
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. Hohmann & Barnard, Inc.
b. Wire-Bond.
2.8 TIES AND ANCHORS
A. General: Ties and anchors shall extend at least 1-1/2 inches into veneer but with at least a
5/8-inch cover on outside face.
B. 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 A1064/A1064M, with ASTM
A153/A153M, Class B-2 coating.
2. Steel Sheet, Galvanized after Fabrication: ASTM A1008/A1008M, Commercial Steel,
with ASTM A153/A153M, Class B coating.
3. Steel Plates, Shapes, and Bars: ASTM A36/A36M.
C. Individual Wire Ties: Rectangular units with closed ends and not less than 4 inches wide.
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HOLT Project No. 2018089
UNIT MASONRY 042000 - 8
1. Where wythes do not align, use adjustable ties with pintle-and-eye connections having a
maximum adjustment of 1-1/4 inches.
2. Wire: Fabricate from 3/16-inch- diameter, hot-dip galvanized steel wire. Mill-galvanized
wire ties may be used in interior walls unless otherwise indicated.
D. Partition Top Anchors: 0.105-inch- thick metal plate with a 3/8-inch- diameter metal rod 6
inches long welded to plate and with closed-end plastic tube fitted over rod that allows rod to
move in and out of tube. Fabricate from steel, hot-dip galvanized after fabrication.
E. Adjustable Masonry-Veneer Anchors:
1. General: Provide anchors that allow vertical adjustment but resist a 100 lbf load in both
tension and compression perpendicular to plane of wall without deforming or developing
play in excess of 1/16 inch.
2. Fabricate sheet metal anchor sections and other sheet metal parts from 0.0785-inch- thick
steel sheet, galvanized after fabrication.
3. Fabricate wire ties from 0.187-inch- diameter, hot-dip galvanized-steel wire unless
otherwise indicated.
4. Masonry-Veneer Anchors; Single-Barrel Screw: Self-drilling, single-barrel screw
designed to receive wire tie. Screw has a smooth barrel the same thickness as insulation
with factory-installed gasketed washer to seal at face of insulation and sheathing.
a. Manufacturers: Subject to compliance with requirements, provide products by the
following:
1) Hohmann & Barnard, Inc.; Thermal 2-Seal Wing Nut Anchor.
5. Polymer-Coated, Steel Drill Screws for Steel Studs: ASTM C954 except manufactured
with hex washer head and neoprene or EPDM washer, No. 10 diameter by length
required to penetrate steel stud flange with not less than three exposed threads, and with
organic polymer coating with salt-spray resistance to red rust of more than 800 hours in
accordance with ASTM B117.
2.9 EMBEDDED FLASHING
A. Metal Flashing: Provide metal flashing complying with Section 076200 "Sheet Metal
Flashing," SMACNA's "Architectural Sheet Metal Manual" and as follows:
1. Metal drip edges: Extend at least 3 inches into wall and 1/2 inch out from wall, with outer
edge bent down 30 degrees and hemmed.
2. Metal sealant stops: Extend at least 3 inches into wall and out to exterior face of wall. At
exterior face of wall, bend metal back on itself for 3/4 inch and down into joint 1/4 inch
to form a stop for retaining sealant backer rod.
B. Flexible Flashing: Use one of the following unless otherwise indicated:
1. Stainless Steel Fabric Flashing: Composite, flashing product consisting of 2-mil of Type
316 stainless steel sheet, bonded to a layer of polymeric fabric, to produce an overall
thickness of 40-mil.
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UNIT MASONRY 042000 - 9
a. 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:
1) Hohmann & Barnard, Inc.
2) PROSOCO, Inc.
3) STS Coatings, Inc.
4) Wire-Bond.
5) York Manufacturing, Inc.
2. Self-Adhering, Stainless Steel Fabric Flashing: Composite, flashing product consisting of
2 mil of Type 316 stainless steel sheet, bonded to a layer of polymeric fabric with a butyl
adhesive permanent, clear adhesive, to produce an overall thickness of 10 mil.
a. 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:
1) Hohmann & Barnard, Inc.
2) STS Coatings, Inc.
3) VaproShield LLC.
4) Wire-Bond.
5) York Manufacturing, Inc.
b. Applications: Use 10-mil- thick flashing at windows, doors, and small wall
penetrations; not at base of walls. Use 40-mil- thick flashing at base of walls.
C. 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.
D. Termination Bars for Flexible Flashing: Stainless steel bars 1/8 inch by 1 inch.
2.10 ACCESSORIES
A. Compressible Filler: Premolded filler strips complying with ASTM D1056, 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 PVC, complying with ASTM D2287, 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 D226/D226M, Type I (No.
15 asphalt felt).
D. Weep/Cavity Vents: Use the following unless otherwise indicated:
1. Cellular Plastic Weep/Vent: One-piece, flexible extrusion made from UV-resistant
polypropylene copolymer, full height and width of head joint and depth 1/8 inch less than
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MEDICAL OFFICE BUILDING
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HOLT Project No. 2018089
UNIT MASONRY 042000 - 10
depth of outer wythe, in color selected from manufacturer's standard.
a. 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:
1) Advanced Building Products Inc.
2) Heckmann Building Products, Inc.
3) Hohmann & Barnard, Inc.
4) Mortar Net Solutions.
5) Wire-Bond.
b. Color/Style: Grey.
E. Cavity Drainage Material: Free-draining mesh, made from polymer strands that will not
degrade within the wall cavity.
1. Mortar Deflector: Strips, full depth of cavity and 10 inches high, with dovetail-shaped
notches that prevent clogging with mortar droppings.
a. Manufacturers: Subject to compliance with requirements, provide the following, or
acceptable equal:
1) CavClear; Masonry Mat.
F. Masonry Cell Fill: Loose-Fill Insulation: Perlite complying with ASTM C549, Type II (surface
treated for water repellency and limited moisture absorption) or Type IV (surface treated for
water repellency and to limit dust generation).
2.11 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 mortar unless otherwise indicated.
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 C270, Proportion Specification. Provide the
following types of mortar for applications stated unless another type is indicated or needed to
provide required compressive strength of masonry.
1. For masonry below grade or in contact with earth, use Type M.
2. For reinforced masonry, use Type S.
3. For exterior, above-grade, load-bearing, nonload-bearing walls, and parapet walls; for
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MEDICAL OFFICE BUILDING
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HOLT Project No. 2018089
UNIT MASONRY 042000 - 11
interior load-bearing walls; for interior nonload-bearing partitions; and for other
applications where another type is not indicated, use Type N.
4. For interior nonload-bearing partitions, Type O may be used instead of Type N.
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 mortar cement by weight.
3. Mix to match Architect's sample.
4. Application: Use pigmented mortar for exposed mortar joints with the following units:
Clay face brick.
E. Grout for Unit Masonry: Comply with ASTM C476.
1. Use grout of type indicated or, if not otherwise indicated, of type (fine or coarse) that will
comply with TMS 602 for dimensions of grout spaces and pour height.
2. Proportion grout in accordance with ASTM C476, Table 1 or paragraph 4.2.1.2 for
specified 28-day compressive strength indicated, but not less than 2000 psi.
3. Provide grout with a slump of 8 to 11 inches as measured in accordance with ASTM
C143/C143M.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine conditions, with Installer present, for compliance with requirements for installation
tolerances and other conditions affecting performance of the Work.
1. For the record, prepare written report, endorsed by Installer, listing conditions detrimental
to performance of the Work.
2. Verify that foundations are within tolerances specified.
3. Verify that reinforcing dowels are properly placed.
4. Verify that substrates are free of substances that impair mortar bond.
B. Before installation, examine rough-in and built-in construction for piping systems to verify
actual locations of piping connections.
C. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 INSTALLATION, GENERAL
A. Thickness: Build cavity and composite walls and other masonry construction to full thickness
shown. Build single-wythe walls to actual widths of masonry units, using units of widths
indicated.
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B. 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.
C. Select and arrange units for exposed unit masonry to produce a uniform blend of colors and
textures. Mix units from several pallets or cubes as they are placed.
D. Wetting of Brick: Wet brick before laying if initial rate of absorption exceeds 30 g/30 sq. in.
per minute when tested in accordance with ASTM C67/C67M. Allow units to absorb water so
they are damp but not wet at time of laying.
3.3 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 or
minus 1/4 inch.
2. For location of elements in plan, do not vary from that indicated by more than plus or
minus 1/2 inch.
3. For location of elements in elevation, do not vary from that indicated by more than plus
or minus 1/4 inch in a story height or 1/2 inch 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 ft., or 1/2-inch maximum.
2. For conspicuous horizontal lines, such as lintels, sills, parapets, and reveals, do not vary
from level by more than 1/8 inch in 10 ft., 1/4 inch in 20 ft., or 1/2-inch maximum.
3. For vertical lines and surfaces, do not vary from plumb by more than 1/4 inch in 10 ft.,
3/8 inch in 20 ft., or 1/2-inch maximum.
4. For conspicuous vertical lines, such as external corners, door jambs, reveals, and
expansion and control joints, do not vary from plumb by more than 1/8 inch in 10 ft., 1/4
inch in 20 ft., or 1/2-inch maximum.
5. For lines and surfaces, do not vary from straight by more than 1/4 inch in 10 ft., 3/8 inch
in 20 ft., or 1/2-inch maximum.
6. For vertical alignment of exposed head joints, do not vary from plumb by more than 1/4
inch in 10 ft., or 1/2-inch maximum.
C. Joints:
1. For bed joints, do not vary from thickness indicated by more than plus or minus 1/8 inch,
with a maximum thickness limited to 1/2 inch.
2. For head and collar joints, do not vary from thickness indicated by more than plus 3/8
inch or minus 1/4 inch.
3. For exposed head joints, do not vary from thickness indicated by more than plus or minus
1/8 inch. Do not vary from adjacent bed-joint and head-joint thicknesses by more than
1/8 inch.
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3.4 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 horizontal face dimensions at
corners or jambs.
C. Stopping and Resuming Work: Stop work by stepping back units in each course from those in
course below; do not tooth. When resuming work, clean masonry surfaces that are to receive
mortar, remove loose masonry units and mortar, and wet brick if required before laying fresh
masonry.
D. Built-in Work: As construction progresses, build in items specified in this and other Sections.
Fill in solidly with masonry around built-in items.
E. Fill space between steel frames and masonry solidly with mortar unless otherwise indicated.
F. Fill cores in hollow CMUs with grout 24 inches under bearing plates, beams, lintels, posts, and
similar items unless otherwise indicated.
G. Build nonload-bearing interior partitions full height of story to underside of solid floor or roof
structure above unless otherwise indicated.
1. Install compressible filler in joint between top of partition and underside of structure
above.
2. Fasten partition top anchors to structure above and build into top of partition. Grout cells
of CMUs solidly around plastic tubes of anchors, and push tubes down into grout to
provide 1/2-inch clearance between end of anchor rod and end of tube. Space anchors 48
inches o.c. unless otherwise indicated.
3. Wedge nonload-bearing partitions against structure above with small pieces of tile, slate,
or metal. Fill joint with mortar after dead-load deflection of structure above approaches
final position.
4. At fire-rated partitions, treat joint between top of partition and underside of structure
above to comply with Section 078443 "Joint Firestopping."
3.5 MORTAR BEDDING AND JOINTING
A. Lay 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.
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UNIT MASONRY 042000 - 14
B. Lay solid masonry units with completely filled bed and head joints; butter ends with sufficient
mortar to fill head joints and shove into place. Do not deeply furrow bed joints or slush head
joints.
C. Set cast-stone trim units in full bed of mortar with full vertical joints. Fill dowel, anchor, and
similar holes.
1. Clean soiled surfaces with fiber brush and soap powder and rinse thoroughly with clear
water.
2. Allow cleaned surfaces to dry before setting.
3. Wet joint surfaces thoroughly before applying mortar.
4. Rake out mortar joints for pointing with sealant.
D. Rake out mortar joints at to a uniform depth of 1/4 inch and point with epoxy mortar to comply
with epoxy-mortar manufacturer's written instructions.
E. Tool exposed joints slightly concave when thumbprint hard, using a jointer larger than joint
thickness unless otherwise indicated.
F. Cut joints flush for masonry walls to receive plaster or other direct-applied finishes (other than
paint) unless otherwise indicated.
3.6 ANCHORED MASONRY VENEERS
A. Anchor masonry veneers to wall framing and concrete and masonry backup with
masonry-veneer anchors to comply with the following requirements:
1. Fasten screw-attached anchors through sheathing to wall framing with metal fasteners of
type indicated. Use two fasteners unless anchor design only uses one fastener.
2. Embed tie sections in masonry joints.
3. Locate anchor sections to allow maximum vertical differential movement of ties up and
down.
4. Space anchors as indicated, but not more than 18 inches o.c. vertically and 24 inches o.c.
horizontally, with not less than one anchor for each 2 sq. ft. of wall area. Install additional
anchors within 12 inches of openings and at intervals, not exceeding 8 inches, around
perimeter.
B. Provide not less than 1 inch of airspace between back of masonry veneer and face of sheathing.
1. Keep airspace clean of mortar droppings and other materials during construction. Bevel
beds away from airspace, to minimize mortar protrusions into airspace. Do not attempt to
trowel or remove mortar fins protruding into airspace.
3.7 MASONRY-JOINT REINFORCEMENT
A. General: Install entire length of longitudinal side rods in mortar with a minimum cover of 5/8
inch on exterior side of walls, 1/2 inch elsewhere. Lap reinforcement a minimum of 6 inches.
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UNIT MASONRY 042000 - 15
1. Space reinforcement not more than 16 inches o.c.
2. Provide reinforcement not more than 8 inches above and below wall openings and
extending 12 inches beyond openings in addition to continuous reinforcement.
B. Interrupt joint reinforcement at control and expansion joints unless otherwise indicated.
C. Provide continuity at corners by using prefabricated L-shaped units.
D. Cut and bend reinforcing units as directed by manufacturer for continuity at corners, returns,
offsets, column fireproofing, pipe enclosures, and other special conditions.
3.8 CONTROL AND EXPANSION JOINTS
A. General: Install control- and expansion-joint materials in unit masonry as masonry progresses.
Do not allow materials to span control and expansion joints without provision to allow for
in-plane wall or partition movement.
B. Form control joints in concrete masonry using one of the following methods:
1. Fit bond-breaker strips into hollow contour in ends of CMUs on one side of control joint.
Fill resultant core with grout, and rake out joints in exposed faces for application of
sealant.
2. Install preformed control-joint gaskets designed to fit standard sash block.
3. Install interlocking units designed for control joints. Install bond-breaker strips at joint.
Keep head joints free and clear of mortar, or rake out joint for application of sealant.
4. Install temporary foam-plastic filler in head joints, and remove filler when unit masonry
is complete for application of sealant.
C. Form expansion joints in brick as follows:
1. Build flanges of metal expansion strips into masonry. Lap each joint 4 inches in direction
of water flow. Seal joints below grade and at junctures with horizontal expansion joints if
any.
2. Build flanges of factory-fabricated, expansion-joint units into masonry.
3. Build in compressible joint fillers where indicated.
4. Form open joint full depth of brick wythe and of width indicated, but not less than 1/2
inch for installation of sealant and backer rod specified in Section 079200 "Joint
Sealants."
D. Provide horizontal, pressure-relieving joints by either leaving an airspace or inserting a
compressible filler of width required for installing sealant and backer rod specified in Section
079200 "Joint Sealants," but not less than 3/8 inch.
1. Locate horizontal, pressure-relieving joints beneath shelf angles supporting masonry.
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3.9 LINTELS
A. Install steel lintels where indicated.
B. Provide minimum bearing of 8 inches at each jamb unless otherwise indicated.
3.10 FLASHING, WEEP HOLES, AND CAVITY VENTS
A. General: Install embedded flashing and weep holes in masonry at shelf angles, lintels, ledges,
other obstructions to downward flow of water in wall, and where indicated. Install cavity vents
at shelf angles, ledges, and other obstructions to upward flow of air in cavities, and 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. At masonry-veneer walls, extend flashing through veneer, across airspace behind veneer,
and up face of sheathing at least 8 inches; with upper edge tucked under air barrier,
lapping at least 4 inches. Fasten upper edge of flexible flashing to sheathing through
termination bar.
3. At lintels and shelf angles, extend flashing 6 inches minimum at each end. At heads and
sills, extend flashing 6 inches minimum and turn ends up not less than 2 inches to form
end dams.
4. Install metal drip edges beneath flexible flashing at exterior face of wall. Stop flexible
flashing 1/2 inch back from outside face of wall, and adhere flexible flashing to top of
metal drip edge.
5. Install metal flashing termination beneath flexible flashing at exterior face of wall. Stop
flexible flashing 1/2 inch back from outside face of wall, and adhere flexible flashing to
top of metal flashing termination.
6. Cut flexible flashing off flush with face of wall after masonry wall construction is
completed.
C. Install weep holes in exterior wythes and veneers in head joints of first course of masonry
immediately above embedded flashing.
1. Use specified weep/cavity vent products to form weep holes.
2. Space weep holes 24 inches o.c. unless otherwise indicated.
3. Cover cavity side of weep holes with plastic insect screening at cavities insulated with
loose-fill insulation.
D. Place cavity drainage material in cavities to comply with configuration requirements for cavity
drainage material in "Accessories" Article.
E. Install cavity vents in head joints in exterior wythes at spacing indicated. Use specified
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weep/cavity vent products to form cavity vents.
1. Close cavities off vertically and horizontally with blocking in manner indicated. Install
through-wall flashing and weep holes above horizontal blocking.
3.11 REINFORCED UNIT MASONRY
A. Temporary Formwork and Shores: Construct formwork and shores as needed to support
reinforced masonry elements during construction.
1. Construct formwork to provide shape, line, and dimensions of completed masonry as
indicated. Make forms sufficiently tight to prevent leakage of mortar and grout. Brace,
tie, and support forms to maintain position and shape during construction and curing of
reinforced masonry.
2. Do not remove forms and shores until reinforced masonry members have hardened
sufficiently to carry their own weight and that of other loads that may be placed on them
during construction.
B. Placing Reinforcement: Comply with requirements in TMS 602.
C. 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 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.
3.12 ADJUSTABLE BRICKWORK SUPPORT SYSTEM
A. Install adjustable brickwork support system in accordance with manufacturer's instructions at
locations indicated on Drawings.
B. Install items plumb and level, accurately fitted, free from distortion or defects.
C. Adjust components to suit site conditions.
D. Obtain approval from Architect and manufacturer before site cutting or making adjustments not
schedule.
E. Tolerances:
1. Maximum variation from level: 1/8 inch.
3.13 FIELD QUALITY CONTROL
A. Testing Agency: Owner will engage a qualified testing agency to perform tests and inspections.
Allow inspectors access to scaffolding and work areas as needed to perform tests and
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inspections. Retesting of materials that fail to comply with specified requirements will be at
Contractor's expense.
B. Mortar Test (Property Specification): For each mix provided, in accordance with ASTM C780.
Test mortar for mortar air content and compressive strength.
C. Grout Test (Compressive Strength): For each mix provided, in accordance with ASTM C1019.
D. Prism Test: For each type of construction provided, in accordance with ASTM C1314 at 7 days
and at 28 days.
3.14 REPAIRING, POINTING, AND CLEANING
A. Remove and replace masonry units that are loose, chipped, broken, stained, or otherwise
damaged or that do not match adjoining units. Install new units to match adjoining units; install
in fresh mortar, pointed to eliminate evidence of replacement.
B. Pointing: During the tooling of joints, enlarge voids and holes, except weep holes, and
completely fill with mortar. Point up joints, including corners, openings, and adjacent
construction, to provide a neat, uniform appearance. Prepare joints for sealant application,
where indicated.
C. In-Progress Cleaning: Clean unit masonry as work progresses by dry brushing to remove
mortar fins and smears before tooling joints.
D. Final Cleaning: After mortar is thoroughly set and cured, clean exposed masonry as follows:
1. Remove large mortar particles by hand with wooden paddles and nonmetallic scrape hoes
or chisels.
2. Test cleaning methods on sample wall panel; leave one-half of panel uncleaned for
comparison purposes. Obtain Architect's approval of sample cleaning before proceeding
with cleaning of masonry.
3. Protect adjacent stone and nonmasonry surfaces from contact with cleaner by covering
them with liquid strippable masking agent or polyethylene film and waterproof masking
tape.
4. Wet wall surfaces with water before applying cleaners; remove cleaners promptly by
rinsing surfaces thoroughly with clear water.
5. Clean brick by bucket-and-brush hand-cleaning method described in BIA Technical
Notes 20.
6. Clean concrete masonry by applicable cleaning methods indicated in NCMA TEK 8-4A.
7. Clean masonry with a proprietary acidic masonry cleaner applied according to
manufacturer's written instructions.
3.15 MASONRY WASTE DISPOSAL
A. Salvageable Materials: Unless otherwise indicated, excess masonry materials are Contractor's
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property. At completion of unit masonry work, remove from Project site.
B. 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. Crush masonry waste to less than 4 inches in each dimension.
2. Mix masonry waste with at least two parts of specified fill material for each part of
masonry waste. Fill material is specified in Section 312000 "Earth Moving."
3. Do not dispose of masonry waste as fill within 18 inches of finished grade.
C. Masonry Waste Recycling: Return broken CMUs not used as fill to manufacturer for recycling.
D. 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 042000
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HOLT Project No. 2018089
CAST STONE MASONRY 047200 - 1
SECTION 047200 - CAST STONE MASONRY
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Wall panels.
2. Trim units.
3. Accessories.
B. Related Requirements:
1. Section 042000 "Unit Masonry" for mortar mixes and mortar materials.
1.3 ACTION SUBMITTALS
A. Product Data: For each type of product.
1. For cast stone units, include construction details, material descriptions, dimensions of
individual components and profiles, and finishes.
B. Sustainable Design Submittals:
1. Product Certificates: For regional materials, indicating location of material manufacturer
and point of extraction, harvest, or recovery for each raw material. Include distance to
Project and cost for each regional material.
2. Environmental Product Declaration (EPD): For each product.
C. Shop Drawings: Show fabrication and installation details for cast stone units. Include
dimensions, details of reinforcement and anchorages if any, and indication of finished faces.
1. Include building elevations showing layout of units and locations of joints and anchors.
D. Samples for Verification:
1. For each color and texture of cast stone required, 4 inches square in size.
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CAST STONE MASONRY 047200 - 2
1.4 QUALITY ASSURANCE
A. Manufacturer Qualifications: A qualified manufacturer of cast stone units similar to those
indicated for this Project, that has sufficient production capacity to manufacture required units,
and is a plant certified by CSI.
B. Mockups: Build mockups to verify selections made under Sample submittals and to
demonstrate aesthetic effects and to set quality standards for materials and execution.
1. Approval of mockups does not constitute approval of deviations from the Contract
Documents contained in mockups unless Architect specifically approves such deviations
in writing.
2. Subject to compliance with requirements, approved mockups may become part of the
completed Work if undisturbed at time of Substantial Completion.
1.5 DELIVERY, STORAGE, AND HANDLING
A. Coordinate delivery of cast stone with unit masonry work to avoid delaying the Work and to
minimize the need for on-site storage.
B. Pack, handle, and ship cast stone units in suitable packs or pallets.
1. Lift with wide-belt slings; do not use wire rope or ropes that might cause staining. Move
cast stone units if required, using dollies with wood supports.
2. Store cast stone units on wood skids or pallets with nonstaining, waterproof covers,
securely tied. Arrange to distribute weight evenly and to prevent damage to units.
Ventilate under covers to prevent condensation.
C. Store cementitious materials on elevated platforms, under cover, and in a dry location. Do not
use cementitious materials that have become damp.
D. Store mortar aggregates where grading and other required characteristics can be maintained and
contamination can be avoided.
1.6 PROJECT 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. Comply with cold-weather construction
requirements in TMS 602.
1. Cold-Weather Cleaning: Use liquid cleaning methods only when air temperature is 40
deg F and above and will remain so until cast stone has dried, but no fewer than seven
days after completing cleaning.
B. Hot-Weather Requirements: Comply with hot-weather construction requirements in TMS 602.
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CAST STONE MASONRY 047200 - 3
PART 2 - PRODUCTS
2.1 MANUFACTURERS
A. Source Limitations for Cast Stone: Obtain cast stone units from single source from single
manufacturer.
2.2 CAST STONE MATERIALS
A. General: Comply with ASTM C1364.
B. Portland Cement: ASTM C150/C150M, Type I or Type III, containing not more than 0.60
percent total alkali when tested according to ASTM C114. Provide natural color or white
cement as required to produce cast stone color indicated.
C. Coarse Aggregates: Granite, quartz, or limestone complying with ASTM C33/C33M; gradation
and colors as needed to produce required cast stone textures and colors.
D. Fine Aggregates: Natural sand or crushed stone complying with ASTM C33/C33M, gradation
and colors as needed to produce required cast stone textures and colors.
E. Color Pigment: ASTM C979/C979M, synthetic mineral-oxide pigments or colored
water-reducing admixtures; color stable, free of carbon black, nonfading, and resistant to lime
and other alkalis.
F. Admixtures: Use only admixtures specified or approved in writing by Architect.
1. Do not use admixtures that contain more than 0.1 percent water-soluble chloride ions by
mass of cementitious materials. Do not use admixtures containing calcium chloride.
2. Use only admixtures that are certified by manufacturer to be compatible with cement and
other admixtures used.
3. Air-Entraining Admixture: ASTM C260/C260M. Add to mixes for units exposed to the
exterior at manufacturer's prescribed rate to result in an air content of 4 to 6 percent,
except do not add to zero-slump concrete mixes.
4. Water-Reducing Admixture: ASTM C494/C494M, Type A.
5. Water-Reducing, Retarding Admixture: ASTM C494/C494M, Type D.
6. Water-Reducing, Accelerating Admixture: ASTM C494/C494M, Type E.
G. Reinforcement:
1. Deformed steel bars complying with ASTM A615/A615M, Grade 40. Use galvanized or
epoxy-coated reinforcement when covered with less than 1-1/2 inches of cast stone
material.
a. Epoxy Coating: ASTM A775/A775M.
b. Galvanized Coating: ASTM A767/A767M.
2. Galvanized-Steel, Welded-Wire Reinforcement: ASTM A1064/A1064M, plain,
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CAST STONE MASONRY 047200 - 4
fabricated from galvanized-steel wire into flat sheets.
H. Embedded Anchors and Other Inserts: Fabricated from stainless steel complying with ASTM
A240/A240M, ASTM A276/A276M, or ASTM A666, Type 304.
2.3 CAST STONE UNITS
A. Manufacturers: Subject to compliance with requirements, provide products by the following:
1. Steps Plus.
B. Regional Materials: Cast stone units shall be manufactured within 100 miles of Project site
from aggregates and cement that have been extracted, harvested, or recovered, as well as
manufactured, within 100 miles of Project site.
C. Cast Stone Units: Comply with ASTM C1364.
1. Units shall be manufactured using the wet-cast method.
2. Wall Panels: Sizes as indicated on Drawings.
3. Trim units including window sills.
D. Fabricate units with sharp arris and accurately reproduced details, with indicated texture on all
exposed surfaces unless otherwise indicated.
1. Slope exposed horizontal surfaces 1:12 to drain unless otherwise indicated.
2. Provide raised fillets at backs of sills and at ends indicated to be built into jambs.
3. Provide drips on projecting elements unless otherwise indicated.
E. Fabrication Tolerances:
1. Variation in Cross Section: Do not vary from indicated dimensions by more than 1/8
inch.
2. Variation in Length: Do not vary from indicated dimensions by more than 1/360 of the
length of unit or 1/8 inch, whichever is greater, but in no case by more than 1/4 inch.
3. Warp, Bow, and Twist: Not to exceed 1/360 of the length of unit or 1/8 inch, whichever
is greater.
4. Location of Grooves, False Joints, Holes, Anchorages, and Similar Features: Do not vary
from indicated position by more than 1/8 inch on formed surfaces of units and 3/8 inch on
unformed surfaces.
F. Cure Units as Follows:
1. Cure units in enclosed, moist curing room at 95 percent relative humidity and
temperature of 100 deg F for 12 hours or 70 deg F for 16 hours.
2. Keep units damp and continue curing to comply with one of the following:
a. No fewer than five days at mean daily temperature of 70 deg F or above.
b. No fewer than seven days at mean daily temperature of 50 deg F or above.
G. Acid etch units after curing to remove cement film from surfaces to be exposed to view.
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CAST STONE MASONRY 047200 - 5
H. Colors and Textures: As indicated on Drawings.
2.4 MORTAR MATERIALS
A. Provide mortar materials that comply with Section 042000 "Unit Masonry."
2.5 ACCESSORIES
A. Anchors: Type and size indicated, fabricated from Type 304 stainless steel complying with
ASTM A240/A240M, ASTM A276/A276M, or ASTM A666.
B. Dowels: 1/2-inch- diameter round bars, fabricated from Type 304 stainless steel complying
with ASTM A240/A240M, ASTM A276/A276M, or ASTM A666.
2.6 MORTAR MIXES
A. Comply with requirements in Section 042000 "Unit Masonry" for mortar mixes.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine substrates and conditions, with Installer present, for compliance with requirements for
installation tolerances and other conditions affecting performance of the Work.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 SETTING CAST STONE IN MORTAR
A. Install cast stone units to comply with requirements in Section 042000 "Unit Masonry."
3.3 ADJUSTING AND CLEANING
A. Remove and replace stained and otherwise damaged units and units not matching approved
Samples. Cast stone may be repaired if methods and results are approved by Architect.
B. Replace units in a manner that results in cast stone matching approved Samples, complying
with other requirements, and showing no evidence of replacement.
END OF SECTION 047200
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