04 20 00 UnitMasonry.pdf

657A5-21-700 EHRM Infrastructure Upgrades

Marion VAMC – Marion, IL

100% Construc$on Documents

04-20-23

UNIT MASONRY

04 20 00 - 1

SECTION 04 20 00

UNIT MASONRY

PART 1 - GENERAL

1.1 DESCRIPTION

A. This sec$on specifies requirements for construc$on of masonry unit walls.

1.2 RELATED WORK

A. Mortars and Grouts: Sec$on 04 05 16, MASONRY GROUTING.

B. Steel Lintels and Shelf Angles: Sec$on 05 50 00, METAL FABRICATIONS.

C. Cavity Insula$on: Sec$on 07 21 13, THERMAL INSULATION.

1.3 SUSTAINABILITY REQUIREMENTS

A. Materials in this sec$on may contribute towards contract compliance with sustainability requirements. See Sec$on 01 81 11, SUSTAINABLE DESIGN REQUIRMENTS, for projectlocal/regional materialsrequirements.

1.4 SUBMITTALS

A. Submit in accordance with Sec$on 01 33 23, SHOP DRAWINGS, PRODUCT DATA AND SAMPLES.

B. Samples:

1. Face brick, sample panel, 200 mm by 400 mm (8 inches by 16 inches,) showing full color range and texture of bricks, bond, and proposed mortar joints.

2. Concrete masonry units, when exposed in finish work.

3. Anchors, and $es, one each and joint reinforcing 305 mm (12 inches) long.

C. Shop Drawings:

1. Indicate special masonry shapes.

2. Indicate reinforcement, applicable dimensions and methods of hanging soffit or lintel masonry and reinforcing masonry for embedment of anchors for hung fixtures.

3. Submit shop drawings for fabrica$on, bending, and placement of reinforcing bars prepared in accordance with ACI 315.

D. Cer$ficates:

Brian.Mays Cloud

Brian.Mays Polygon

Brian.Mays Text Box

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1. Submit cer$ficates signed by manufacturer, including name and address of contractor, project loca$on, and the quan$ty, and date or dates of shipment of delivery to which cer$ficate applies.

2. Indicate that the following items meet specifica$on requirements:

a. Face brick.

b. Solid and load-bearing concrete masonry units.

3. Iden$fy tes$ng laboratories facili$es and qualifica$ons of its principals and key personnel to perform tests specified.

E. Manufacturer's Literature and Data:

1. Anchors, $es, and reinforcement.

2. Shear keys.

3. Reinforcing bars.

1.6 WARRANTY

A. Warranty exterior masonry walls against moisture leaks and subject to terms of "Warranty of

Construc$on", FAR clause 52.246-21, except that warranty period to be five years.

1.7 APPLICABLE PUBLICATIONS

A. Publica$ons listed below form a part of this specifica$on to extent referenced. Publica$ons are referenced in text by the basic designa$on only. Comply with applicable provisions and recommenda$ons of the following, except as otherwise shown or specified.

B. American Society for Tes$ng and Materials (ASTM):

A615/A615M-12 Deformed and Plain Carbon-Steel Bars for Concrete

Reinforcement

A675/A675M-03 (2009) Steel Bars, Carbon, Hot-Wrought, Special Quality, Mechanical

Proper$es

A951/A951M-11 Steel Wire for Masonry Joint Reinforcement

C67-12 Sampling and Tes$ng Brick and Structural Clay Tile

C90-12 Load bearing Concrete Masonry Units

C216-12a Facing Brick (Solid Masonry Units Made From Clay or Shale)

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C476-10 Grout for Masonry

C612-10 Mineral Fiber Block and Board Thermal Insula$on

D1056-07 Flexible Cellular Materials - Sponge or Expanded Rubber

C. American Welding Society (AWS):

D1.4/D1.4M-11 Structural Welding Code – Reinforcing Steel

D. Brick Industry Associa$on - Technical Notes on Brick Construc$on (BIA):

11-2001 Brick Masonry, Part I

11A–1988 Brick Masonry, Part II

11B–1988 Brick Masonry, Part III Execu$on

11C-1998 for Brick Masonry Engineered Brick Masonry, Part IV

11D-1988 Brick Masonry Engineered Brick Masonry, Part IV con$nued

11E-1991 Brick Masonry, Part V

E. Masonry Industry Council:

Hot and Cold Weather Masonry Construc$on Manual, 1999

F. Masonry Standards Joint CommiJee; Specifica$ons for Masonry Structures (TMS 602-11/ACI

530.1-11/ASCE 6-11) (MSJC)

G. American Concrete Ins$tute (ACI):

SP-66(2004) ACI Detailing Manual

PART 2 - PRODUCTS

2.1 BRICK

A. Face Brick:

1. ASTM C216, Grade SW, Type FBS.

2. Brick when tested in accordance with ASTM C67: Classified slightly efflorescent or beJer.

3. Size:

a. Modular.

2.2 CONCRETE MASONRY UNITS

A. Hollow and Solid Load-Bearing Concrete Masonry Units: ASTM C90.

1. Unit Weight: Normal weight .

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2. Sizes: Modular.

2.3 REINFORCEMENT

A. Steel Reinforcing Bars: ASTM A615, deformed bars, 420 MPa (Grade 60) for bars No. 10 to No. 57

(No. 3 to No. 18), except as otherwise indicated.

C. Joint Reinforcement:

1. Form from wire complying with ASTM A951.

2. Galvanized aNer fabrica$on.

3. Width of joint reinforcement 40 mm (1 5/8-inches) less than nominal width of masonry wall or par$$on.

4. Cross wires welded to longitudinal wires.

5. Joint reinforcing at least 3000 mm (10 feet) in length.

6. Joint reinforcing in rolls is not acceptable.

7. Joint reinforcing that is crimped to form drip is not acceptable.

8. Maximum spacing of cross wires 400 mm (16 inches) to longitudinal wires.

9. Ladder Design:

a. Longitudinal wires deformed4 mm (0.16 inch) diameter wire.

b. Cross wires 2.6 mm (0.10 inch) diameter.

10. Trussed Design:

a. Longitudinal and cross wires not less than 4 mm (0.16 inch nominal) diameter.

b. Longitudinal wires deformed.

2.4 ANCHORS, TIES, AND REINFORCEMENT

A. Adjustable Veneer Anchor for Frame Walls:

1. Two piece, adjustable anchor and $e.

2. Anchor and $e may be either type; use only one type throughout.

3. Loop Type:

a. Anchor: Screw-on galvanized steel anchor strap 2.75 mm (0.11 inch) by 19 mm (3/4 inch) wide by 225 mm (9 inches) long, with 9 mm (0.35 inch) offset and 100 mm (4 inch) adjustment. Provide 5 mm (0.20 inch) hole at each end for fasteners.

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b. Ties: Triangular $e, fabricated of 5 mm (0.20 inch) diameter galvanized cold drawn steel wire. Ties long enough to engage the anchor and be embedded not less than 50 mm (2 inches) into the bed joint of the masonry veneer.

4. Angle Type:

a. Anchor: Minimum 2 mm (16 gage) thick galvanized steel angle shaped anchor strap.

Provide hole in ver$cal leg for fastener. Provide hole near end of outstanding leg to suit upstanding por$on of $e.

B. Rigid Anchors: Fabricate from steel bars bent to configura$on indicated.

2.5 PREFORMED COMPRESSIBLE JOINT FILLER

A. Thickness and depth to fill the joint as specified.

B. Closed Cell Neoprene: ASTM D1056, Type 2, Class A, Grade 1.

C. Non-Combus$ble Type: ASTM C612, Type V, 1800 degrees F.

2.6 ACCESSORIES

A. Weeps: Glass fiber ropes, 10 mm (3/8 inch) minimum diameter, 300 mm (12 inches) long.

B. Mesh Weep/Vent: Free-draining mesh; made from polyethylene strands, of length required to extend from exterior face of stone to cavity behind, in color selected from manufacturer's standard.

C. Cavity Drain Material: Recycled polyester/polyethylene mesh trapezoidal shaped to maintain cavity air flow and drainage while suspending mortar droppings at unequal heights.

D. Reinforcing Bar Posi$oners: Wire units designed to fit into mortar bed joints spanning masonry unit cells with loops for holding reinforcing bars in center of cells. Units are formed from 0.148-inch steel wire, hot-dip galvanized aNer fabrica$on. Provide units designed for number of bars indicated.

E. Masonry Cleaner:

1. Detergent type cleaner selected for each type of masonry used.

2. Acid cleaners are not acceptable.

3. Use soap-less type specially prepared for cleaning brick or concrete masonry as appropriate.

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PART 3 - EXECUTION

3.1 JOB CONDITIONS

A. Protec$on:

1. Cover tops of walls with non-staining waterproof covering, when work is not in progress;

secure to prevent wind blow off.

2. On new work protect base of wall from mud, dirt, mortar droppings, and other materials that will stain face, un$l final landscaping or other site work is completed.

B. Cold Weather Protec$on:

1. Masonry may be laid in freezing weather when methods of protec$on are u$lized.

2. Comply with MSJC and “Hot and Cold Weather Masonry Construc$on Manual”.

3.2 CONSTRUCTION TOLERANCES

A. Lay masonry units plumb, level and true to line within the tolerances as per MSJC requirements and as follows:

B. Maximum varia$on from plumb:

1. In 3,000 mm (10 feet) - 6 mm (1/4 inch).

2. In 6,000 mm (20 feet) - 10 mm (3/8 inch).

C. Maximum varia$on from level:

1. In any bay or up to 6,000 mm (20 feet) - 6 mm (1/4 inch).

2. In 12,000 mm (40 feet) or more - 13 mm (1/2 inch).

D. Maximum varia$on from linear building lines:

1. In any bay or up to 6,000 mm (20 feet) - 13 mm (1/2 inch).

2. In 12,000 mm (40 feet) or more - 19 mm (3/4 inch).

E. Maximum varia$on in cross-sec$onal dimensions of columns and thickness of walls from dimensions shown:

1. Minus 6 mm (1/4 inch).

2. Plus 13 mm (1/2 inch).

F. Maximum varia$on in prepared opening dimensions:

1. Accurate to minus 0 mm (0 inch).

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2. Plus 6 mm (1/4 inch).

3.3 INSTALLATION GENERAL

A. Keep finish work free from mortar smears or spaJers, and leave neat and clean.

B. Anchor masonry as specified in Paragraph, ANCHORAGE.

C. Wall Openings:

1. Fill hollow metal frames built into masonry walls and par$$ons solid with mortar as laying of masonry progresses.

2. If items are not available when walls are built, prepare openings for subsequent installa$on.

D. Tooling Joints:

1. Do not tool un$l mortar has s$ffened enough to retain thumb print when thumb is pressed against mortar.

2. Tool while mortar is soN enough to be compressed into joints and not raked out.

3. Finish joints in exterior face masonry work with a join$ng tool, and provide smooth, water-

$ght concave joint unless specified otherwise.

4. Tool Exposed interior joints in finish work concave unless specified otherwise.

E. Lintels:

1. Lintels are not required for openings less than 1,000 mm (3 feet 4 inches) wide that have hollow metal frames.

2. Openings 610 mm (2 feet 0 inches) wide to 1600 m (5 feet 4 inches) wide with no structural steel lintel or frames, require a lintel formed of concrete masonry lintel or bond beam units filled with grout per ASTM C476 and reinforced with 1- #15m (1-#5) rod top and boJom for each 100 mm (4 inches) of nominal thickness unless shown otherwise.

3. Use steel lintels, for openings over 1600 m (5 feet 4 inches) wide, and brick masonry unless shown otherwise.

4. Provide length for minimum bearing of 100 mm (4 inches) at ends.

F. Before connec$ng new masonry with previously laid, remove loosened masonry or mortar, and clean and wet work in place as specified under weUng.

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G. When new masonry par$$ons start on exis$ng floors, machine cut exis$ng floor finish material down to concrete surface.

H. WeUng and WeUng Test:

1. Test and wet brick in accordance with BIA 11B.

2. Do not wet concrete masonry units before laying.

3.4 ANCHORAGE

A. Veneer to Frame or Masonry Walls:

1. Use adjustable veneer anchors.

2. Fasten anchor to stud through sheathing with self-drilling and tapping screw, one at each end of loop type anchor. In masonry backup stagger $es in alternate courses.

3. Space anchors not more than 400 mm (16 inches) on center ver$cally at each stud or 600 mm (24 inches) maximum horizontally.

3.5 REINFORCEMENT

A. Joint Reinforcement:

1. Use as joint reinforcement in CMU wythe of combina$on brick and CMU, cavity walls, and single wythe concrete masonry unit walls or par$$ons.

2. Reinforcing may be used instead of individual $es for anchoring brick facing to CMU backup in exterior masonry walls.

3. Brick veneer over frame backing walls does not require joint reinforcement.

B. Steel Reinforcing Bars:

1. Install in cells of hollow masonry units where required for ver$cal reinforcement and in bond beam units for lintels and bond beam horizontal reinforcement. Install in wall cavi$es of reinforced masonry walls where shown.

3.6 BRICK EXPANSION AND CMU CONTROL JOINTS

A. Provide brick expansion (BEJ) and CMU control (CJ) joints where shown on drawings.

B. Keep joint free of mortar and other debris.

C. Where joints occur in masonry walls:

1. Install preformed compressible joint filler in brick wythe.

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2. Install cross shaped shear keys in concrete masonry unit wythe with preformed compressible joint filler on each side of shear key unless otherwise specified.

3. Install filler, backer rod, and sealant on exposed faces.

D. Use standard notched concrete masonry units (sash blocks) made in full and half-length units where shear keys are used to create a con$nuous ver$cal joint.

E. Interrupt steel joint reinforcement at expansion and control joints unless otherwise shown.

F. Fill opening in exposed face of expansion and control joints with sealant as specified in Sec$on

07 92 00, JOINT SEALANTS.

3.7 BUILDING EXPANSION AND SEISMIC JOINTS

A. Keep joint free of mortar. Remove mortar and other debris.

B. Install non-combus$ble, compressible type joint filler to fill space completely except where sealant is shown on joints in exposed finish work.

C. Where joints are on exposed faces, provide depth for backer rod and sealant as specified in

Sec$on 07 92 00, JOINT SEALANTS, unless shown otherwise.

3.8 BRICKWORK

A. Lay clay brick in accordance with BIA Technical Note 11 series.

B. Laying:

1. Lay brick in running bond with course of masonry bonded at corners unless shown otherwise.

2. Maintain bond paJern throughout.

3. Do not use brick smaller than half-brick at any angle, corner, break or jamb.

4. Where length of cut brick is greater than one half but less than a whole brick, maintain the ver$cal joint loca$on of such units.

5. Lay exposed brickwork joints symmetrical about center lines of openings.

6. Before star$ng work, lay facing brick on founda$on wall and adjust bond to openings, angles, and corners.

7. Lay brick for sills with wash and drip.

8. Build solid brickwork as required for anchorage of items.

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C. Joints:

1. Exterior and interior joint widths: Lay for three equal joints in 200 mm (eight inches) ver$cally, unless shown otherwise.

2. Rake joints for poin$ng with colored mortar when colored mortar is not full depth.

D. Weep Holes:

1. Install weep holes at 600 mm (24 inches) on center in boJom of ver$cal joints of exterior masonry veneer or cavity wall facing over founda$ons, bond beams, and other water stops in the wall.

2. Form weep holes using wicks made of mineral fiber insula$on strips turned up 200 mm (8 inches) in cavity. Anchor top of strip to backup to securely hold in place.

3. Install cavity drain material.

E. Cavity Type Exterior Walls:

1. Keep air space clean of mortar accumula$ons and debris.

a. Clean cavity by use of hard rubber, wood or metal channel strips having soN material on sides contac$ng wythes.

b. LiN strips with wires before placing next courses of horizontal joint reinforcement or individual $es // or adjustable cavity wall $es. //

3. Insulated Cavity Type Exterior Walls:

a. Install the insula$on against the cavity face of inner masonry wythe.

b. Place insula$on between rows of $es or joint reinforcing or bond to masonry surface with a bonding agent as recommended by the manufacturer of the insula$on.

c. Lay the outer masonry wythe up with an air space between insula$on and masonry units.

4. Veneer Framed Walls:

a. Build with 100 mm (4 inches) of face brick over sheathed stud wall with air space.

b. Keep air space clean of mortar accumula$ons and debris.

3.9 CONCRETE MASONRY UNITS

A. Kind and Users:

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1. Provide special concrete masonry shapes as required, // including lintel and bond beam units, sash units, and corner units //. Use solid concrete masonry units, where full units cannot be used, or where needed for anchorage of accessories.

2. Provide solid load-bearing concrete masonry units or grout the cell of hollow units at jambs of openings in walls, where structural members impose loads directly on concrete masonry, and where shown.

B. Laying:

1. Lay concrete masonry units with 10 mm (3/8 inch) joints, with a bond overlap of not less than 1/4 of the unit length.

2. Do not wet concrete masonry units before laying.

3. Bond external corners of par$$ons by overlapping alternate courses.

4. Lay first course in a full mortar bed.

5. Set anchorage items as work progress.

6. Where ends of anchors, bolts, and other embedded items, project into voids of units, completely fill such voids with mortar or grout.

7. Provide a an open joint as indicated in the drawingsfor caulking between exis$ng construc$on, exterior walls, concrete work, and abuUng masonry par$$ons.

8. Lay concrete masonry units with full face shell mortar beds and fill head joint beds for depth equivalent to face shell thickness.

9. Lay concrete masonry units so that cores of units, that are to be filled with grout, are ver$cally con$nuous with joints of cross webs of such cores completely filled with mortar.

10. Do not wedge the masonry against the steel reinforcing. Minimum 13 mm (1/2 inch) clear distance between reinforcing and masonry units.

11. Hold ver$cal steel reinforcement in place by centering clips, caging devices, $e wire, or other approved methods, ver$cally at spacing noted.

12. Grout cells of concrete masonry units, containing the reinforcing bars, solid as specified under grou$ng.

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3.10 GROUTING

A. Prepara$on:

1. Clean grout space of mortar droppings before placing grout.

2. Close cleanouts.

B. Placing:

1. Consolidate each liN of grout aNer free water has disappeared but before plas$city is lost.

2. Interrup$ons: When grou$ng must be stopped for more than an hour, top off grout 40 mm

(1-1/2 inch) below top of last masonry course.

3.11 PLACING REINFORCEMENT

A. General: Clean reinforcement of loose rust, mill scale, earth, ice or other materials which will reduce bond to mortar or grout. Do not use reinforcement bars with kinks or bends not shown on the Contract Drawings or final shop drawings, or bars with reduced cross-sec$on due to excessive rus$ng or other causes.

B. Posi$on reinforcement accurately at the spacing indicated. Support and secure ver$cal bars against displacement. Horizontal reinforcement may be placed as the masonry work progresses.

Where ver$cal bars are shown in close proximity, provide a clear distance between bars of not less than the nominal bar diameter or 25 mm (1 inch), whichever is greater.

C. Splice reinforcement bars where shown; do not splice at other places unless accepted by the

RE/COR. Provide lapped splices, unless otherwise indicated. In splicing ver$cal bars or aJaching to dowels, lap ends, place in contact and wire $e.

D. Provide not less than minimum lap as indicated on shop drawings, or if not indicated, as required by governing code.

E. Embed metal $es in mortar joints as work progresses, with a minimum mortar cover of 15 mm

(5/8 inch) on exterior face of walls and 13 mm (1/2 inch) at other loca$ons.

F. Embed prefabricated horizontal joint reinforcement as the work progresses, with a minimum cover of 15 mm (5/8 inch) on exterior face of walls and 13 mm (1/2 inch) at other loca$ons. Lap joint reinforcement not less than 150 mm (6 inches) at ends. Use prefabricated “L” and “T” sec$ons to provide con$nuity at corners and intersec$ons. Cut and bend joint reinforcement as

04 20 00 - 13 recommended by manufacturer for con$nuity at returns, offsets, column fireproofing, pipe enclosures and other special condi$ons.

G. Anchoring: Anchor reinforced masonry work to suppor$ng structure as indicated.

3.12 CLEANING AND REPAIR

A. General:

1. Clean exposed masonry surfaces on comple$on.

2. Protect adjoining construc$on materials and landscaping during cleaning opera$ons.

3. Cut out defec$ve exposed new joints to depth of approximately 19 mm (3/4 inch) and repoint.

4. Remove mortar droppings and other foreign substances from wall surfaces.

B. Brickwork:

1. First wet surfaces with clean water; then wash down with a solu$on of soap-less detergent.

Do not use muria$c acid.

2. Brush with s$ff fiber brushes while washing, and immediately thereaNer hose down with clean water.

3. Free clean surfaces of traces of detergent, foreign streaks, or stains of any nature.

C. Concrete Masonry Units:

1. Immediately following seUng, brush exposed surfaces free of mortar or other foreign maJer.

2. Allow mud to dry before brushing.

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