SPEC NOTE:  This master guide specification Section is intended for use when specifying cast stone components as part of non-loadbearing wall applications.

SPEC NOTE: This master guide specification Section has been produced by a Certified Construction Specifier (CCS), in accordance with the recommended standards and practices described in the CSI Manual of Practice.  It specifically uses the standardized formats MasterFormat™, SectionFormat™ and PageFormat™ to organize the information.

SPEC NOTE:  Optional choices are indicated by using square brackets to surround the optional text, such as [_____].  Delete any inappropriate choices, and then remove any remaining square brackets prior to final printing.  Where selection is indicated with an [OR] statement, select the appropriate paragraph and delete the inappropriate statement.  Delete all SPEC NOTEs and [OR] statements prior to final printing.

SPEC NOTE: Arriscraft•SPEC is a commercially-developed guide specification system.  Arriscraft•SPEC Sections are intended to be used by design professionals knowledgeable in specification writing techniques and masonry construction practices.  They must be edited to reflect project-specific requirements.  Arriscraft International accepts no responsibility or liability for the completeness and accuracy of the information contained herein, nor for the accuracy or completeness of project specifications developed using the Arriscraft•SPEC system.

SECTION 04 72 00

CAST STONE MASONRY

PART 1	GENERAL

1.01		SECTION INCLUDES

A.	Arris-Cast Units features, trim, ornamentation and facings.

SPEC NOTE: Edit to suit project requirements.

1.02		RELATED SECTIONS

A.	Section 04 05 00 - Common Work Results for Masonry.

B.	Section 04 05 13 - Masonry Mortaring.

C.	Section 04 05 16 - Masonry Grouting.

D.	Section 04 05 19 - Masonry Anchorage and Reinforcing.

E.	Section 04 05 23 - Masonry Accessories.

F.	[Section 04 73 13 - Calcium Silicate Manufactured Stone Masonry.]

G. 	[Section 04 73 23 - Calcium Silicate Manufactured Building Stone Masonry.]

H.	Section 07 92 00 – Joint Sealants.

SPEC NOTE: Edit the following Article in conjunction with the requirements of Part 2 - Products and Part 3 - Execution.  Delete those reference standards not required by the Project.  Insert the correct date for each applicable standard. 
•	

1.03		REFERENCES

A.	TMS 402-[___]/ACI 530-[___]/ASCE 5-[___], Building Code Requirements for Masonry Structures.

B.	TMS 602-[___]/ACI 530.1-[___]/ASCE 6-[___], Specifications for Masonry Structures.

C.	ASTM C1364-[___], Standard Specification for Architectural Cast Stone.

D.	ASTM C1194-[___], Standard Test Method for Compressive Strength of Architectural Cast Stone.

E. 	ASTM C1195-[___], Standard Test Method for Absorption of Architectural Cast Stone.

F.	[International Masonry Institute All-Weather Council: Recommended Practices and Guide Specifications for Cold Weather Masonry Construction.]

G.	[Masonry Advisory Council: Hot and Cold Weather Construction.]

1.04		DEFINITIONS

A.	Arris-Cast Units – manufactured from zero slump concrete.
1.	Vibrant Dry Tamp (VDT) casting method: Vibratory ramming of earth moist, zero- slump concrete against a rigid mold until it is densely compacted.

1.05		SHOP DRAWINGS

A.	Submit shop drawings as specified in Section [01 00 00] [01 33 00] [_____].

B.	Shop Drawings: including profiles, cross-sections, reinforcement, exposed faces, arrangement of joints, anchoring methods, [anchors], annotation of stone types and their location. 

1.06		SAMPLES

A.	Submit Samples as specified in Section [01 00 00] [01 33 00] [_____].

B.	Selection Samples: duplicate [8" x 5-5/8"] [___ x ___] size samples, illustrating available finishes and colors for selection by [Architect] [Engineer].

SPEC NOTE: request analysis and testing reports only for larger projects, or where special conditions warrant the additional cost of such testing.

1.07		TEST REPORTS

A.	Submit test reports as specified in Section [01 00 00] [01 33 00] [_____].
 
B.	Test Reports: test results prepared by an independent testing agency, indicating tested material characteristics as part of a source quality control program, current within the past [two (2)] [five (5)] years.

1.08		QUALITY ASSURANCE

A.	Manufacturer Qualifications: manufacturer having sufficient plant facilities to produce the shapes, quantities and size of Products required in accordance with the project schedule.

B.	Mock-up: Supply sufficient quantity of full size Arris-cast units for use in constructing mock-up panel, as specified in Section [04 05 00] [_____].

1.09		DELIVERY, STORAGE AND HANDLING

A.	Refer to Section [01 00 00] [01 60 00] [_____].

B.	Deliver Arris-cast units in protective film.  Prevent damage to units.

C.	Lift skids with proper and sufficiently long slings or forks with protection to prevent damage to units.  Protect edges and corners.

D.	Store Arris-cast units on level ground in a manner designed to prevent damage and staining of units.

E.	Stack units on timbers or platforms at least 3 inches above grade.

F.	Place polyethylene or other plastic film between wood and other finished surfaces of units when stored for extended periods of time.

G.	Cover stored units with protective enclosure if exposed to weather.

H.	Do not use salt or calcium-chloride to remove ice from masonry surfaces. 

1.10		ENVIRONMENTAL REQUIREMENTS

SPEC NOTE: Select only one of the following Paragraphs, and delete the unwanted statement.  Edit to suit project requirements.

A.	Maintain materials and surrounding air temperature at minimum 52 degrees F prior to and 48 hours after completion of masonry work.

[OR]

A.	Conform to [IMIAC - Recommended Practices and Guide Specifications for Cold Weather Masonry Construction] [MAC - Hot and Cold Weather Construction].

PART 2 	PRODUCTS

2.01		MANUFACTURERS

SPEC NOTE:  In this article, list the manufacturers acceptable to the specifier.  Consider including the name and telephone number of a local distributor to assist bidders with product sourcing.

A.	Manufacturers of Arris-cast units having Products considered acceptable for use:
1.	Arriscraft International[, as distributed by [_____]].

B.	Substitution Procedures: refer to [Instructions to Bidders] [and] [Section [01 00 00] [01 25 00] [_____]].

2.02		MATERIALS

A.	Portland Cement: to ASTM C150, Type I or Type III, [White] [Grey] color.

B.	Coarse Aggregate: Limestone, to ASTM C33, except for gradation.

C.	Fine Aggregate:  Manufactured or natural sands, to ASTM C33, except for gradation.

D.	Pigments:  Inorganic iron oxide pigments, to ASTM C979.  Do not use carbon black pigment.

E.	Retarding, Accelerating and High-Range Admixtures: to ASTM C494/C495M, Types A - G. 

F.	Water Repellents and Other Chemical Admixtures:  previously established as suitable for use in concrete by proven field performance or through laboratory testing.

G.	Dark Mineral Admixtures: to ASTM C618.

H.	Water:  Potable.

2.03		COMPONENTS

A.	Arris-Cast Units: Sizes, profiles and textures as indicated on Drawings; Arris•cast by Arriscraft International, and having the following physical properties:
1.	Compressive Strength (ASTM C1194): > 6,500 psi at 28 days.
2.	Absorption (ASTM C1195): < 6.0% percent at 28 days.

B.	Mortar: Portland cement-hydrated lime-sand mix, Type N to ASTM C270, as specified in Section [04 05 13] [_____].

C.	Grout: maximum 6,500 psi at 28 days, as specified in Section [04 05 16] [_____].

D.	Anchors: stainless steel type, as specified in Section [04 05 19] [_____].

E.	Joint Sealants and Backer Rods: non-staining type, as specified in Section [07 92 00] [_____].

F.	Flashing, Vents, and Accessories:  as specified in Section [04 05 23] [_____].

2.04		FABRICATION

A.	Fabricate cast stone masonry units to sizes and profiles as indicated on Drawings.

B.	Fabricate Arris-cast units using the Vibrant Dry Tamp Casting method.

C.	Do not use dark mineral admixtures in surfaces intended to be exposed to view

D.	Steam cure cast stone units at a minimum temperature of 104 degrees F for a minimum of 10 hours at 100% humidity.

E.	Yard cure units for 350 degree-days prior to shipping.

2.05		FABRICATION TOLERANCES

A.	Cross Section Dimensions:  not deviating by more than plus or minus 1/8 inch from approved dimensions.

B.	Length of Units: not deviating by more than L/360 or plus or minus 1/8 inch, whichever is greater, maximum plus or minus 1/4 inch.

C.	Maximum Length of any Unit: maximum 15 times the average thickness of the unit.

D.	Warp, Bow or Twist of Units: maximum L/360 or plus or minus 1/8 inch, whichever is greater.

E.	Location of Dowel Holes, Anchor Slots, Flashing Grooves, False Joints:  maximum deviation as follows:
1.	On Formed Sides of Unit:  1/8 inch,
2.	On Unformed Sides of Unit:  3/8 inch. 

2.06		FINISHES

A.	Exposed Surfaces:  fine-grained texture similar to natural stone, [_____] color [as selected by [Architect] [Engineer]], free of cracks, chips or other defects that would affect the strength or serviceability of the unit or become exposed once installed and visible when viewed from a distance of not less than 15 feet under diffused light.   

2.07		SOURCE QUALITY CONTROL

A.	Test Arris-cast units as specified in Section [01 00 00] [01 40 00] [_____].

B.	Test compressive strength and absorption from specimens selected at random from plant production, to ASTM C1194 and ASTM C1195. 
1.	 Test samples taken from every 500 cubic feet of product produced.
2.	 Test new and existing mix designs for strength and absorption compliance prior to producing units.

PART 3 	EXECUTION

3.01		EXAMINATION

A.	Verify site conditions are ready to receive work.

B.	Inspect materials for fit and finish prior to installation. Do not set unacceptable units.

C.	Beginning of installation means acceptance of existing conditions.

3.02		INSTALLATION

A.	Install Arris-cast units where indicated on Drawings.  Conform to TMS 402-[___]/ACI 530-[___]/ASCE 5-[___], Building Code Requirements for Masonry Structures and TMS 602-[___]/ACI 530.1-[___]/ASCE 6-[___], Specifications for Masonry Structures.

B.	Drench units with clean water prior to setting.

C.	Fill dowel holes and anchor slots completely with mortar or non-shrink grout.

D.	Set units in full bed of mortar, unless otherwise detailed.  Flush vertical joints full with mortar.

E.	Maintain 3/8 inch wide joints.

F.	Leave joints with exposed tops or under relieving angles open for sealant.

G.	Leave head joints in copings and projecting components open for sealant.

H.	Rake mortar joints 3/4 inch for pointing or sealing.

F.	 Remove excess mortar from unit faces immediately after setting.

G.	Tuck point unit joints to a slight concave profile, except those designated to receive joint sealant.

H.	Seal remaining joints with backer rod and joint sealant.  Conform to Section [07 92 00] [_____].

3.03		SITE TOLERANCES

A.	Variation in Alignment from Unit to Adjacent Unit: 1/16 inch maximum.

B.	Variation of Mortar Joint Thickness: 1/8 inch every 3 feet.

3.04		FIELD QUALITY CONTROL

A.	Perform inspection and testing as specified in Section [01 00 00] [01 40 00] [_____].

B.	Test one randomly selected sample from the field for each 500 cubic feet delivered to the job site.  Verify compliance with the following:
1.	Three field cut cube specimens from each of these samples shall have an average minimum compressive strength of not less than 85 percent with no single specimen testing less than 75 percent of design strength as allowed by ACI 318. 
2.	Three field cut cube specimens from each of these samples shall have an average maximum cold-water absorption of 6 percent.

C.	[Architect] [Engineer] Inspection:  [Architect] [Engineer] will inspect installed masonry and reject masonry that is chipped, cracked, or blemished (streaked, stained or otherwise damaged), as described below.
1.	Masonry will be inspected to be free of chips, cracks or other blemishes on the finished face or front edges of the masonry units exceeding 3/8 inch or that can be seen from a distance of 10 feet.
2.	Units shall exhibit a texture approximately equal to the approved sample when viewed under direct daylight illumination at a 10 feet distance. 
3.	Minor chipping resulting from shipment and delivery shall not be grounds for rejection. Minor chips shall not be obvious under direct daylight illumination from a 20 feet distance. 
4.	Crazing and efflorescence will not be cause for rejection.

D.	Make Good rejected masonry as directed by [Architect] [Engineer].

3.05		ADJUSTING AND CLEANING

A.	Repair chips with touchup materials furnished by manufacturer.
SPEC NOTE: Select one of the following Paragraphs.  Edit as recommended by cast stone masonry unit manufacturer’s recommendations.  Refer to Arriscraft•NOTE Volume II, No. 2, Cleaning Masonry.

B.	Clean masonry units as specified in Section [04 05 00] [_____].

[OR]

B.	Clean [a 100 square foot area of wall designated by [Architect] [Engineer]] [one-half of mock-up panel] as directed below and leave for one week. If no harmful effects appear and after mortar has set and cured, clean masonry as follows:
1.	Protect windows, sills, doors, trim and other work from damage.
2.	Remove large particles with [stiff fiber brushes] [wood paddles] without damaging surface.
3.	Saturate masonry with clean water and flush off loose mortar and dirt.
4.	Dilute cleaning agent with clean water in controlled proportions.
5.	Apply solution to pre-soaked wall surface using [soft-bristled brush] [low pressure acid-resistant sprayer].
6.	Thoroughly rinse cleaning solution and residue from wall surface. 

C.	Use alternative cleaning solutions and methods for difficult to clean masonry only after consultation with cast stone masonry unit manufacturer.

3.06		PROTECTION

A.	Protect units from damage resulting from subsequent construction operations.

B.	Use protection materials and methods which will not stain or damage units.

C.	Remove protection materials upon Substantial Completion, or when risk of damage is no longer present.

END OF SECTION