SECTION 04410

ROUGH STONE

PART	GENERAL

SECTION INCLUDES

Rough [field] [rubble] stone veneer at [exterior] [and] [interior] wall.

Metal anchors, mortar, and joint pointing.

Joint sealants.

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section [______-____________]: Placement of [wall] [________] anchors and devices.

PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION

Section 05500 - Metal Fabrications: Metal fabricated items for building into rough stone.

[Section 07620 - Sheet Metal Flashing and Trim: Sheet metal [coping] [and] [sill] flashings.]

RELATED SECTIONS

Section [01400 - Quality Control] [01410 - Testing Laboratory Services]: Testing laboratory services.

Section 02517 - Stone Pavers.

Section [______-____________]: Concrete supporting wall.

Section 04100 - Mortar: Bedding and pointing mortar.

Section [______-____________]: Masonry supporting wall.

Section 04500 - Masonry Restoration and Cleaning.

Section [05120 - Structural Steel] [Section 05500 - Metal Fabrications]: Masonry anchors from structural steel framing members.

Section 05500 - Metal Fabrications: Shelf [angles] [________] and supports.

Section [______-____________]: [Formed steel] [Wood] framed supporting wall.

Section 07620 - Sheet Metal Flashing and Trim: [Coping,] [lintel,] [and] [sill] flashings.

Section 07900 - Joint Sealers: Sealant for [perimeter,] [control,] [and] [expansion] joints.

ALLOWANCES

Cash Allowance: Include under provisions of Section [01019.] [________.]

Allowance includes purchase and delivery of rough stone units; installation is included in this section and is part of the Contract Sum/Price.

REFERENCES

ASTM A123 - Zinc (Hot Galvanized) Coatings on Products Fabricated from Rolled, Pressed, and Forged Steel Shapes, Plates, Bars, and Strip.

ASTM A167 - Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip.

ASTM C270 - Mortar for Unit Masonry.

ASTM C387 - Packaged, Dry, Combined Materials for Mortar and Concrete.

ASTM C780 - Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry.

ASTM C1019 - Method of Sampling and Testing Grout.

IMIAC (International Masonry Industry All-Weather Council) - Recommended Practices and Guide Specifications for Cold Weather Masonry Construction.

SUBMITTALS

Submit [two] [_______] samples illustrating minimum and maximum stone sizes, color range and texture, [mortar color,] markings, and [________].

QUALIFICATIONS

Installer: Company specializing in performing the work of this section [with minimum [__________] years [documented] experience.] [approved by stone fabricator.]

MOCKUP

Provide mockup of rough stone wall under provisions of Section [01400.] [________.]

Construct rough stone wall mockup, [____] feet ([____] m) long by [____] feet ([____] m) wide, including stone anchor accessories, sill and head flashings, [window frame,] [corner condition,] [typical control joint,] [and] [________].

Locate [where directed.] [________.]

Mockup may [not] remain as part of the Work.

PRE-INSTALLATION CONFERENCE

Convene [one] [_____] week prior to commencing work of this section, under provisions of Section [01039.] [________.]

ENVIRONMENTAL REQUIREMENTS

Cold Weather Requirements: IMIAC - Recommended Practices and Specifications for Cold Weather Masonry Construction.

****** [OR] ******

Maintain materials and ambient air to a minimum 40 degrees F (5 degrees C) prior to, during, and 48 hours after completion of work.

During temporary storage on site, at the end of working day, or during rainy weather, cover stone work exposed to weather with non-staining waterproof coverings, securely anchored.

SEQUENCING

Sequence work under the provisions of Section [01010.] [________.]

Sequence work to coordinate the installation of stone work with installation of adjacent construction.

PART	PRODUCTS

ACCEPTABLE STONE SUPPLIERS

[__________________________________].

[__________________________________].

[__________________________________].

Substitutions: Under provisions of Section [01600.] [________.]

STONE

Stone: [Field] [Rubble] [________] type, [granite.] [sandstone.] [limestone.] [________.]

Type: [________] color, [________] surface finish, [________] grade; free of defects.

Nominal Thickness: [____] inch ([____] mm).

Nominal Face Size: [____x____] inch ([____x____] mm).

MORTAR

Mortar: As specified in Section [04100.] [________.]

****** [OR] ******

Mortar: ASTM C270 using [Property] [Proportion] specifications; with Type [I] [____] Portland cement of [grey] [white] color, with Type [S] [SA] hydrated lime.

****** [OR] ******

Mortar: ASTM C270 using [Property] [Proportion] specifications; with masonry cement of [grey] [white] color.

Water: Clean and potable.

Admixtures: [Not permitted.] [Latex emulsion.] [________.]

Pointing Mortar Color: [Mineral oxide pigment] [________] of [________] color [as selected]; [________] manufactured by [____________].

ACCESSORIES

Anchors, Dowels, Ties, Cramps, and [________]: [Stainless steel to ASTM A167, Type 304] [Steel, galvanized after fabrication to ASTM A123 [1.25] [____] oz/sq ft ([380] [____] g/sq m)], of sizes and configurations required for support of stone and applicable superimposed loads.

Supports: [Stainless steel Type 304] [Steel, galvanized after fabrication to ASTM A123 [1.25] [____] oz/sq ft ([380] [____] g/sq m)].

Bolts, Washers and Nuts: [Stainless steel Type 304.] [Galvanized steel.] [________.]

[Flashings: [[________] type.] [Specified in Section [07620] [________].]

Cavity Vents: [________] type; [____] size; [________] manufactured by [____________].

Weeps: [________] type; [____] size; [________] manufactured by [____________].

Joint Filler: [Closed cell foam] [________] type; [____] size; [________] manufactured by [____________].

Bond Breaker: [Sheet 10 mil (0.25 mm) thick plastic.] [________.]

Sealant: [________] type specified in Section [07900] [________]; [________] color [as selected] [to match stone color].

Back Coating: [Bituminous.] [________.]

****** [OR] ******

Back Coating: Cementitious parging of mortar to a minimum thickness of [____] inch ([____] mm).

Cleaning Solution: [[________] type.] [Type which will not harm stone, joint materials, or adjacent surfaces.]

MORTAR MIX

Setting Mortar: Type [M] [S] [N] using the Property Method.

Pointing Mortar: Type [N] [O] using the Property Method.

Add [mortar color] [and] [admixtures] in accordance with manufacturer's instructions. Ensure uniformity of mix and coloration.

Do not use anti-freeze compounds to lower the freezing point of mortar.

If water is lost by evaporation, re-temper only within two hours of mixing.

Use mortar within two hours after mixing at temperatures of 80 degrees F (26 degrees C), or two-and-one-half hours at temperatures under 50 degrees F (10 degrees C).

STONE FABRICATION

Form stone corners to [irregular] [________] joint profile. Clean jagged corners from stone in preparation for setting.

Slope exposed top surfaces of stone and horizontal sill surfaces for shedding water.

Cut drip slot in stone projecting more than 1/2 inch (13 mm) over [window frame.] [________.] Size slot not less than 3/8 inch (10 mm) wide and 1/4 inch (6 mm) deep for full width of projection.

[Coat [back] [cavity] surface of stone with [bituminous] [________] coating on surfaces not in contact with mortar. Allow coating to cure.]

MIX TESTS

Test mortar [and grout] in accordance with Section [01400.] [01410.]

Testing of Mortar Mix: In accordance with ASTM C780.

Test mortar mix for [compressive strength,] [consistency,] [mortar aggregate ratio,] [water content,] [air content,] [splitting tensile strength,] [and] [________].

Testing of Grout Mix: In accordance with ASTM C1019.

Test mortar mix for [compressive strength,] [slump,] [and] [________].

PART	EXECUTION

EXAMINATION

Verify that support work and site conditions are ready to receive work of this section.

Verify that items built-in under other sections are properly located and sized.

PREPARATION

Establish lines, levels, and coursing. Protect from disturbance.

Verify that items built-in under other sections are properly located and sized.

Clean stone prior to erection. Do not use wire brushes or implements which can mark or damage exposed surfaces.

INSTALLATION

Install flashings of longest practical length and seal water tight to back-up. Lap end joint minimum [6] [____] inches ([150] [____] mm) and seal watertight.

[Cut] [Split] stone at site to produce clean faces.

Size stone units to fit opening dimensions and perimeter conditions.

Wet absorptive stone in preparation for placement to minimize moisture suction from mortar.

Arrange stone pattern to provide color uniformity, visual variations, blend of stone unit sizes, and [variable] [constant] joint sizes throughout.

Provide setting bed [and pointing] mortar in accordance with Section [04100.] [________.]

****** [OR] ******

Install mortar in accordance with [ASTM C780.] [________.]

Fill dowel holes in stone units with mortar.

Set stone in full mortar setting bed to fully support stone over bearing surface.

Shore up units [until setting bed will maintain panel in position without movement.] [for [7] [____] days after setting.]

Rake out mortar joints [5/8 to 3/4] [________] inch ([16 to 19] [________] mm) and brush joints clean to accommodate pointing mortar.

Fill joints with pointing mortar. Pack and work into voids. Neatly tool surface to [concave] [raked] [_______] joint.

Install cavity vents at [top of each cavity space,] [below shelf angles,] [and] [________________] at spacing of [____] inches ([____] mm) on center, horizontally.

Install weeps in vertical stone joints at [____] inches ([____] mm) on center, horizontally; immediately above horizontal flashings, [above shelf angles and supports,] [at bottom of walls,] [and] [________]. Do not permit mortar accumulation in cavity space.

Rake out joints [____] inch ([____] mm) to accommodate sealant and [joint filler,] [bond breaker,] at [perimeter,] [control,] [and] [expansion] joints.

CLEANING

Remove excess mortar [and sealant] upon completion of work.

Clean soiled surfaces with cleaning solution.

Use non-metallic tools in cleaning operations.

END OF SECTION