SECTION 04340

REINFORCED UNIT MASONRY SYSTEM

PART 1 GENERAL

SECTION INCLUDES

[Concrete masonry] [Giant brick] [__________] units.

Reinforcement, anchorage, and accessories.

[Parged masonry surfaces.]

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section [_____ - __________:] Special anchors for placement in [_______________.]

PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION

Section [_____ - __________:] Placement of precast concrete [anchors.] [__________.]

Section 05120 - Structural Steel: Placement of steel anchors for [__________.]

Section 05210 - Steel Joists: Placement of steel bearing pads for joists.

Section 05500 - Metal Fabrications: Placement of loose steel lintels.

Section [_____ - __________:] Placement of fabricated steel items.

Section 07620 - Flashing and Sheet Metal: Placement of reglets for flashings.

Section [_____ - __________:] Placement of window anchors in [_______________.]

RELATED SECTIONS

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

Section 04100 - Mortar: Mortar and grout.

Section 04235 - Preassembled Masonry Panels.

Section 04270 - Glass Unit Masonry.

Section 04410 - Rough Stone: Rough stone bonded to masonry.

Section 04450 - Cut Stone Veneer: [Marble] [Granite] [Limestone] [Slate] veneer bonded to masonry.

Section 04500 - Masonry Restoration and Cleaning.

Section 07160 - Bituminous Dampproofing: Dampproofing [parged] masonry surfaces.

Section 07900 - Joint Sealers: Rod and sealant at [control] [and] [expansion] joints.

REFERENCES

ANSI/ASTM A82 - Cold-Drawn Steel Wire for Concrete Reinforcement.

ANSI/ASTM C55 - Concrete Building Brick.

ANSI/ASTM C216 - Facing Brick (Solid Masonry Units Made From Clay or Shale).

ANSI/ASTM C652 - Hollow Brick (Hollow Masonry Units Made From Clay or Shale).

ASTM A123 - Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products.

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

ASTM A525 - Steel Sheet, Zinc Coated, (Galvanized) by the Hot-Dip Process.

ASTM A580 - Stainless and Heat-Resisting Steel Wire.

ASTM A615 - Deformed and Plain Billet Steel Bars for Concrete Reinforcement.

ASTM B370 - Copper Sheet and Strip for Building Construction.

ASTM C90 - Hollow Load Bearing Concrete Masonry Units.

ASTM C145 - Solid Load Bearing Concrete Masonry Units.

IMIAC - International Masonry Industry All-Weather Council: Recommended Practices and Guide Specification for Cold Weather Masonry Construction.

SUBMITTALS

Submit shop drawings under provisions of Section [01300.] [01340.]

Submit shop drawings indicating bars sizes, spacings, locations, quantities of reinforcement, bending and cutting schedules, supporting and spacing devices[,][.] [and] [_______________.]

Submit product data under provisions of Section [01300.] [01340.]

Submit product data for [giant brick] [__________] masonry units and [fabricated wire reinforcement.] [____________.]

Submit samples under provisions of Section [01300.] [01340.]

Submit [four] [_____] samples of [face brick] [__________] units to illustrate color, texture and extremes of color range.

Submit manufacturer's certificate under provisions of Section [01400] [01405] that [products] [__________] meet or exceed [specified requirements.] [_______________.]

Submit manufacturer's installation instructions under provisions of Section [01300.] [01340.]

QUALIFICATIONS

Installer: Company specializing in performing the work of this Section with minimum [_____] years [documented] experience.

Design engineered masonry work under direct supervision of a Professional Structural Engineer experienced in design of this work and licensed [at the place where the Project is located.] [in the State of [_______________.]]

REGULATORY REQUIREMENTS

Conform to [UL Assembly No. [_____]] [______________] requirements for [fire rated] [__________] masonry construction.

MOCK-UP

Provide mock-up of [composite] [__________] masonry under provisions of Section [01400.] [01405.]

Erect [giant brick] [__________] to [3 x 4][_____ x _____] feet ([900 x 1 200] [_____ x _____] mm) panel size, include specified mortar and accessories.

When accepted, mock-up will demonstrate minimum standard for the work. Mock-up 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 [01200.] [01220.]

DELIVERY, STORAGE, AND HANDLING

Deliver products to site under provisions of Section [01600.] [01610.]

Store and protect products under provisions of Section [01600.] [01620.]

Accept [glazed] [_____] units on site. Inspect for damage.

ENVIRONMENTAL REQUIREMENTS

Maintain materials and surrounding air temperature to minimum 50 degrees F (10 degrees C) prior to, during, and 48 hours after completion of masonry work.

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

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

SEQUENCING AND SCHEDULING

Coordinate work under provisions of Section [01005.] [01040.] [01041.]

Coordinate the masonry work with [[__________] veneer.] [installation of window anchors.] [_______________.]

EXTRA MATERIALS

Submit under provisions of Section [01700.] [01750.]

Furnish [50] [_____] of each size, color, and type of [glazed] units.

PART 2 PRODUCTS

MANUFACTURERS - CONCRETE MASONRY UNITS

[______________________________] Product [__________.]

[______________________________] Product [__________.]

[______________________________] Product [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

CONCRETE MASONRY UNITS

Hollow Load Bearing Block Units: ASTM C90, Grade [N,] [S,] Type [I - Moisture Controlled;] [II - Non-moisture Controlled;] [normal] [medium] [light] weight.

Solid Load Bearing Block Units: ASTM C145, Grade [N,] [S,] Type [I - Moisture Controlled;] [II - Non-moisture Controlled;] [normal] [medium] [light] weight.

Decorative Block Units: ASTM [C90,] [_____,] Grade [N,] [S,] Type [I - Moisture Controlled;] [II - Non-moisture Controlled;] [_____] color [as selected] to the following design:

[Single scored horizontally] [Single scored vertically] [Double scored vertically] [Triple scored vertically] to a ['V'] [square] [half round] cut.

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

[Ribbed] [Ribbed and split] with [three] [four] vertical ribs.

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

[Ground face.] [_______________.]

Concrete Brick Units: ANSI/ASTM C55, [Grade [N,] [S,] Type [I - Moisture Controlled;] [II - Non-moisture Controlled;] [normal] [light] weight.] [of same Grade, Type, and Weight as block units.]

Masonry Units: Nominal modular size of[_____ x _____ x _____] inches ([_____ x _____ x _____] mm). Provide special units for 90 degree corners, bond beams, lintels[,][.] [coved base][,][.] [and] [bullnosed corners.]

MANUFACTURERS - GIANT BRICK UNITS

[______________________________] Product [__________.]

[______________________________] Product [__________.]

[______________________________] Product [__________.]

Substitutions: Under provisions of Section [01600.] [01630.]

GIANT BRICK UNITS

Giant Face Brick: ANSI/ASTM C216, Type [FBS,] [FBX,] [FBA,] Grade [MW;] [SW;] [_____] color[.] [as selected.]

Giant Hollow Facing and Building Brick: ANSI/ASTM C652, Grade [SW,] [MW,] Type [HBS;] [HBX;] [HBA;] [HBB;] [_____] color[.] [as selected.]

Brick Masonry Units: Nominal size of[_____ x _____ x _____] inches ([_____ x _____ x _____] mm). Provide special units for [90] [_____] degree corners, [lintels[,][.] [bullnosed corners][,][.] [and] [__________.]

[Special Brick Shape: Shaped to [profile indicated;] [__________;] surface texture on [_____] sides[.] [and ends.]]

REINFORCEMENT AND ANCHORAGE

Single Wythe Joint Reinforcement: [Truss] [Ladder] type; [[hot dip galvanized after fabrication] [unprotected] cold-drawn steel conforming to ANSI/ASTM A82,] [stainless steel conforming to ASTM A580 Type 304,] [3/16] [_____] inch ([4.8] [_____] mm) side rods with [_____] inch ([_____] mm) cross ties; [__________] manufactured by [_______________.]

Reinforcing Steel: [__________] type, specified in Section [03200;] [_____;] [_____] size, [galvanized] [unprotected] finish.

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

Reinforcing Steel: ASTM A615, [40] [60] [75] ksi ([276] [414] [517] MPa) yield grade, [plain] [deformed] billet bars, [galvanized] [unprotected] finish.

Strap Anchors: [__________] bent steel shape,[_____ x _____] inch ([_____ x _____] mm) size x [_____] inch ([_____] mm) thick, [galvanized to ASTM A123 [G90] [_____]] [unprotected] finish.

FLASHINGS

Plastic Flashings: Sheet [polyvinyl chloride;] [polyethylene;] [10] [20] [_____] mil ([0.25] [0.5] [_____] mm) thick; [__________] manufactured by [________________.]

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

Copper/Kraft Paper Flashings: [1] [2] [3] [_____] oz/sq ft ([305] [610] [915] [_____] g/sq m) sheet copper bonded to fiber reinforced asphalt treated Kraft paper; [__________] manufactured by [_______________.]

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

Plastic/Kraft Paper Flashings: [3] [_____] mil ([0.8] [_____] mm) thick sheet polyethylene bonded to layer of fiber reinforced asphalt and backed with Kraft paper; [__________] manufactured by [_______________.]

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

Copper: ASTM B370, [cold rolled;] [soft temper;] [20] [24] [_____] oz/sq ft, [0.027] [0.032] [_____] inch ([0.7] [0.8] [_____] mm) thick; natural finish.

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

Pre-coated Galvanized Steel: ASTM A525, [G90;] [_____;] [_____] gage ([_____] mm) core steel, shop pre-coated with [__________] coating of [__________] color[.] [as selected.]

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

Galvanized Steel: ASTM A525, [G90] [G140] [_____] finish, [24] [26] [_____] gage ([0.6] [0.5] [_____] mm) core steel.

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

Stainless Steel: ASTM A167, Grade [_____,] Type 304, softtemper; [_____] inch ([_____] mm) thick; smooth finish.

ACCESSORIES

Preformed Control Joints: [Rubber] [Neoprene] [Polyvinylchloride] [__________] material. Provide with corner and tee accessories, [heat] [cement] fused joints, [__________] manufactured by [_______________.]

Joint Filler: Closed cell [polyvinylchloride;] [polyethylene;] [polyurethane;] [rubber;] [__________;] oversized 50 percent to joint width; self-expanding; [_____] inch ([_____] mm) wide by maximum lengths; [__________] manufactured by [_______________.]

Building Paper: [#15] [#30] asphalt saturated felt.

[Nailing Strips: Softwood, preservative treated for moisture resistance, dovetail shape, sized to masonry joints.]

Cleaning Solution: Non-acidic, not harmful to masonry work or adjacent materials.

LINTELS

Precast Concrete Lintels: [_______________] type,[_____ x _____] inch ([_____ x _____] mm) size, [_____] psi ([_____] MPa) strength at 28 days, [__________] manufactured by [_______________.]

PART 3 EXECUTION

INSTALLERS

[________________________________________.]

[________________________________________.]

[________________________________________.]

EXAMINATION

Verify that field conditions are acceptable and are ready to receive work.

Verify items provided by other Sections of work are properly sized and located.

Verify that built-in items are in proper location, and ready for roughing into masonry work.

Beginning of installation means installer accepts existing conditions.

PREPARATION

Direct and coordinate placement of metal anchors supplied to other Sections.

Provide temporary bracing during installation of masonry work. Maintain in place until building structure provides permanent bracing.

COURSING

Establish lines, levels, and coursing indicated.	Protect from displacement.

Maintain masonry courses to uniform dimension. Form vertical and horizontal joints of uniform thickness.

Lay concrete masonry units in [running] [stacked] [__________] bond. Course one unit and one mortar joint to equal [8] [_____] inches ([200] [_____] mm). Form [concave] [raked] [flush] [bevelled] [__________] mortar joints.

Lay brick units in [running] [stacked] [common] [__________] bond. Course three brick units and three mortar joints to equal [8] [_____] inches ([200] [_____] mm). Form [concave] [raked] [flush] [bevelled] [extruded] [__________] mortar joints.

PLACING AND BONDING

Lay solid masonry units in full bed of mortar, with full head joints, uniformly jointed with other work.

Lay hollow masonry units with face shell bedding on head and bed joints.

Buttering corners of joints or excessive furrowing of mortar joints are not permitted.

Remove excess mortar as Work progresses.

[Interlock] [__________] intersections and external corners.

Do not shift or tap masonry units after mortar has achieved initial set. Where adjustment must be made, remove mortar and replace.

Perform jobsite cutting of masonry units with proper tools to provide straight, clean, unchipped edges. Prevent broken masonry unit corners or edges.

Cut mortar joints flush where [ceramic or quarry wall tile is scheduled][,][.] [cement parging is required][,][.] [resilient base is scheduled][,][.] [or] [bitumen dampproofing is applied.]

Isolate masonry partitions from vertical structural framing members with a control joint[.] [as indicated.]

Isolate top joint of masonry partitions from horizontal structural framing members and slabs or decks with [compressible joint filler.] [_______________.]

REINFORCEMENT AND ANCHORAGES - REINFORCED UNIT MASONRY

Install horizontal joint reinforcement [16] [_____] inches ([400] [_____] mm) oc.

Place masonry joint reinforcement in first [and second] [__________] horizontal joints above and below openings. Extend minimum [16] [_____] inches ([400] [_____] mm) each side of opening.

Place joint reinforcement continuous in first [and second] joint below top of walls.

Lap joint reinforcement ends minimum [6] [_____] inches ([150] [_____] mm). Extend minimum [16] [_____] inches ([400] [_____] mm) each side of openings.

Support and secure reinforcing bars from displacement. Maintain position within 1/2 inch (13 mm) of dimensioned position.

Embed anchors [embedded in concrete.] [attached to structural steel members.] Embed anchorages in every [second block] [sixth brick] [__________] joint.

Reinforce [stack bonded unit] joint corners and intersections with strap anchors [16] [_____] inches ([400] [_____] mm) oc.

MASONRY FLASHINGS

Extend flashings [under] [over] [through] veneer, turn up minimum [8] [_____] inches ([200] [_____] mm) and [bed into mortar joint of masonry] [seal to concrete] [seal to sheathing over [wood] [steel stud] [framed]] back-up.

Lap end joints minimum [6] [_____] inches ([150] [_____] mm) and seal watertight.

[Use flashing manufacturer's recommended adhesive and sealer.]

LINTELS

Install [precast concrete] [__________] lintels over [window openings][,][.] [door openings][,][.] [and] [__________.]

Install reinforced unit masonry lintels over openings where steel or precast concrete lintels are not scheduled.

Openings Up To [42] [_____] Inches ([1 070] [_____] mm) Wide): Place [two,] [_____,] [No. 3] [No. 4] [_____] ([M9] [M12] [_____]) reinforcing bars [1] [_____] inch ([25] [_____] mm) from bottom web.

Openings From [42] [_____] Inches ([1 070] [_____] mm) Up To [78] [_____] Inches ([1 980] [_____] mm) Wide: Place [two,] [_____,] [No. 5] [_____] ([M16] [_____]) reinforcing bars [1] [_____] inch ([25] [_____] mm) from bottom web.

Openings Over [78] [_____] Inches ([1 980] [_____] mm): [Reinforce openings as detailed.] [_______________.]

Use single piece reinforcing bars only.

Support and secure reinforcing bars from displacement. Maintain position within 1/2 inch (13 mm) of dimensioned position.

Place and consolidate grout fill without displacing reinforcing.

[Allow masonry lintels to attain specified strength before removing temporary supports.]

Maintain minimum [_____] inch ([_____] mm) bearing on each side of opening.

GROUTED COMPONENTS

Reinforce bond beam with [2,] [_____,] [No. [_____]] (M[_____]) bars, [1] [_____] inch ([25] [_____] mm) from bottom web.

Reinforce [pilaster] [__________] with [_____,] [No. [_____]] (M[_____]) bars, placed [_______________.]

Lap splices minimum [24] [_____] bar diameters.

Support and secure reinforcing bars from displacement. Maintain position within 1/2 inch (13 mm) of dimensioned

position.

Place and consolidate grout fill without displacing reinforcing.

At bearing locations, fill masonry cores with grout for a minimum [12] [_____] inches ([300] [_____] mm) either side of opening.

ENGINEERED MASONRY

Lay masonry units with core cells vertically aligned [and cavities between wythes] clear of mortar and unobstructed.

Place mortar in masonry unit bed joints back 1/4 inch (6 mm) from edge of unit grout spaces, bevel back and upward. Permit mortar to cure [7] [_____] days before placing grout.

Reinforce masonry unit cores [and cavities] with reinforcement bars and grout[.] [as indicated.]

Retain vertical reinforcement in position at top and bottom of cells and at intervals not exceeding [192] [_____] bar diameters. Splice reinforcement in accordance with Section [03200.] [_____.]

[Wet masonry unit surfaces in contact with grout just prior to grout placement.]

Grout spaces less than 2 inches (50 mm) in width with fine grout using low lift grouting techniques. Grout spaces 2 inches (50 mm) or greater in width with course grout using high or low lift grouting techniques.

When grouting is stopped for more than one hour, terminate grout [1-1/2] [_____] inch ([38] [_____] mm) below top of upper masonry unit to form a positive key for subsequent grout placement.

Low Lift Grouting: Place first lift of grout to a height of 16 inches (400 mm) and rod for grout consolidation. Place subsequent lifts in 8 inch (200 mm) increments and rod for grout consolidation.

High Lift Grouting:

Provide cleanout opening no less than [4] [_____] inches ([100] [_____] mm) high at the bottom of each cell to be grouted by cutting one face shell of masonry unit.

In double wythe walls, omit every [second] [_____] masonry unit in one of the wythes for clean out and cell inspection purposes.

In double wythe walls, construct vertical grout barriers or dams between the masonry wythes, with masonry units every [30] [_____] feet ([10] [_____] m) maximum.

Clean out masonry cells [and cavities] with high pressure water spray. Permit complete water drainage.

Request the Architect/Engineer to inspect the cells[.] [and cavities.] Allow [3] [_____] days advance notice of inspection.

After cleaning and cell inspection, seal openings with masonry units.

Pump grout into spaces. Maintain water content in grout to intended slump without aggregate segregation.

Limit grout lift to [48] [_____] inches ([1 200] [_____] mm) and rod for grout consolidation. Wait [30 to 60] [_____] minutes before placing next lift.

CONTROL [AND EXPANSION] JOINTS

Do not continue horizontal joint reinforcement through control [and expansion] joints.

Form control joint with a sheet building paper bond breaker, fitted to one side of the hollow contour end of the block unit. Fill the resultant elliptical core with grout fill. Rake joint at exposed unit faces for placement of backer rod and sealant.

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

Install preformed control joint devices in continuous lengths. Seal butt and corner joints in accordance with manufacturer's instructions.

Size control joint in accordance with Section 07900 for sealant performance.

[Form expansion joint as detailed.]

BUILT-IN WORK

As work progresses, build in [metal door [and glazed] frames] [fabricated metal frames] [window frames] [wood nailing strips] [fireplace accessories] [anchor bolts] [plates] [__________] and other items furnished by other Sections.

Build in items plumb and level.

Bed anchors of metal door [and glazed] frames in adjacent mortar joints. Fill frame voids solid with grout. [Fill adjacent masonry cores with grout minimum [12] [_____] inches ([300] [_____] mm) from framed openings.]

Do not build in organic materials subject to deterioration.

TOLERANCES

Maximum Variation From Alignment of [Columns:] [Pilasters:] [1/4] [_____] inch ([6] [_____] mm).

Maximum Variation From Unit to Adjacent Unit: [1/32] [_____] inch ([1.5] [_____] mm).

Maximum Variation From Plane of Wall: 1/4 inch in 10 feet (6 mm/3 m) and 1/2 inch in 20 feet (13 mm/6 m) or more.

Maximum Variation From Plumb: 1/4 inch (6 mm) per story non-cumulative; 1/2 inch (13 mm) in two stories or more.

Maximum Variation From Level Coursing: 1/8 inch in 3 feet (3 mm/m) and 1/4 inch in 10 feet (6 mm/3 m); 1/2 inch in 30 feet (13 mm/9.1 m).

Maximum Variation of Joint Thickness: 1/8 inch in 3 feet (3 mm/m).

CUTTING AND FITTING

Cut and fit for [chases][,][.] [pipes][,][.] [conduit][,][.] [sleeves][,][.] [grounds][,][.] [and] [__________.] Coordinate with other Sections of work to provide correct size, shape, and location.

Obtain Architect/Engineer approval prior to cutting or fitting masonry work not indicated or where appearance or strength of masonry work may be impaired.

PARGING

Dampen masonry walls prior to parging.

[Scarify each parging coat to ensure full bond to subsequent coat.]

Parge masonry walls in [two] [_____] uniform coats to mortar to a total thickness of [_____] inch ([_____] mm).

[Steel trowel] [__________] surface smooth and flat with a maximum surface variation of 1/8 inch per foot (1:100).

CLEANING

Clean work under provisions of Section [01700.] [01710.]

Remove excess mortar and mortar smears.

Replace defective mortar. Match adjacent work.

Clean soiled surfaces with cleaning solution.

Use non-metallic tools in cleaning operations.

PROTECTION OF FINISHED WORK

Protect finish installation under provisions of Section [01500.] [01535.]

Without damaging completed work, provide protective boards at exposed external corners which may be damaged by construction activities.

SCHEDULES

Exterior Wall: An exterior veneer of face brick veneer, bonded with strap anchors to inner wythe of engineered concrete masonry units.

Interior Fire Walls: Single wythe engineered concrete masonry units, 8 inch nominal thickness, to two hour fire assembly rating.

END OF SECTION