Section 04155 MASONRY ACCESSORIES

Section 04155

_{MASONRY ACCESSORIES}

PART 1 - GENERAL

1.1 THE REQUIREMENT

A. The CONTRACTOR shall furnish all tools, equipment, materials, and supplies and shall perform all labor required to complete the reinforced hollow unit masonry work as indicated on the Drawings and specified herein.

1.2 RELATED WORK SPECIFIED ELSEWHERE

A. The requirements of the following sections and divisions apply to the Work of this section. Other sections and divisions of the Specifications, not referenced below, shall also apply to the extent required for proper performance of this Work.

1. Division 01, Additional General Requirements

2. Section 04230, Reinforced Hollow Unit Masonry

3. Section 04510, Masonry Cleaning

1.3 REFERENCE SPECIFICATIONS, CODES AND STANDARDS

A. All Work specified herein shall conform to or exceed the applicable requirements of the referenced portions of the following publications to the extent that the provisions thereof are not in conflict with other provisions of these Specifications.

B. Comply with the applicable provisions of the following codes, regulations and standards.

1. ASTM International (ASTM):

A82 Standard Specification for Steel Wire, Plain, for Concrete

Reinforcement

A153 Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

A951 Standard Specification for Steel Wire for Masonry Joint

Reinforcement

A1008 Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy, High- Strength Low-Alloy with Improved Formability, Solution Hardened, and Bake Hardenable

D624 Standard Test Method for Tear Strength of Conventional

Vulcanized Rubber and Thermoplastic Elastomers

D2287 Standard Specification for Nonrigid Vinyl Chloride Polymer and Copolymer Molding and Extrusion Compounds

2. Building Code:

a. International Code Council (ICC):

1) California Building Code and associated standards, 2010 Edition including all amendments, referred to herein as Building Code.

C. Mock-Ups:

1. Provide specified products for inclusion into mock-up panels required by

Specification section 04230, Reinforced Hollow Unit Masonry.

2. Coordinate with built-in items.

1.4 CONTRACTOR SUBMITTALS

A. Submittals shall be made in accordance with the General Requirements, Additional

General Requirements and as specified herein.

1. Product technical data including:

a. Acknowledgement that products submitted meet requirements of standards referenced.

b. Manufacturer's installation instructions.

c. Manufacturer's data sheet on each product.

PART 2 - PRODUCTS

2.1 ACCEPTABLE MANUFACTURERS

A. Subject to compliance with the Contract Documents, the following manufacturers are acceptable:

1. Masonry anchors, horizontal joint reinforcing veneer anchorage system and miscellaneous anchors:

a. Dur-O-Wal. b. Heckman.

c. Hohmann & Barnard, Inc. d. Wire Bond.

e. Or Equal.

2. Preformed control joint inserts:

a. Dur-O-Wal.

b. Hohmann & Barnard, Inc. c. Or Equal.

3. Grout screen: a. Wire Bond. b. Dur-O-Wal.

c. Heckman Building Products. d. Hohmann & Barnard, Inc.

e. Or Equal.

2.2 MANUFACTURED UNITS

A. Horizontal Joint Reinforcing:

1. General:

a. Conform to ASTM A951.

b. Cold drawn steel wire ASTM A82. c. 9 GA side rods.

d. 9 gauge cross rods.

e. Hot-dipped galvanized, ASTM A153.

f. Prefabricated corner and tee sections with minimum length of 30 inches from point of intersection

2. Single Wythe wall joint reinforcing:

a. Ladder design at walls with vertical reinforcing.

b. Truss design at walls without vertical reinforcing.

3. Composite wall joint reinforcing: (Not Used).

_{4. Cavity wall joint reinforcing with masonry back-up:}

a. Ladder design horizontal joint reinforcing. B. Grout Screen:

1. Polypropylene monofilament.

2. 1/4 x 1/4 inch mesh.

3. Width of grout screen to be 2 inches less than nominal width of CMU.

C. Preformed Control Joint Inserts:

1. ASTM D2287.

2. Hardness: 85 durometer.

_{3. Shear Strength: Minimum 2,831 pounds per foot joint.}

4. Dur-O-Wal #D/A 2002 or Hohmann & Barnard #VS Series, Or Equal.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install products in accordance with manufacturer's instructions.

B. Butt joints of preformed control joint inserts tightly together and secure with adhesive or sealant acceptable to insert manufacturer.

C. Anchoring Veneer:

1. Veneer with concrete block back-up: (Not Used)

_{2. Veneer with concrete back-up: (Not Used)}

D. Reinforcing Masonry:

1. General:

a. Provide continuous horizontal joint reinforcing in all concrete masonry wall construction.

1) Embed longitudinal side rods in mortar for entire length with minimum cover of 5/8 inch on exterior side of walls and 1/2 inch at other locations.

a) For interior partitions, the "exterior" side of the wall is considered the side having the most corrosive atmosphere or the corridor side of the wall.

2) Lap reinforcement minimum of 12 inches at ends

a) Remove cross wires on one (1) side of the lap splice and bend the side rods slightly so the lap is provided with 12 inches of uninterrupted wire lap occurring in the same plane.

3) Do not bridge control joints with horizontal joint reinforcing.

4) Do not bridge expansion joints with horizontal joint reinforcing.

5) At corners and wall intersections use prefabricated "L" and "T" horizontal joint reinforcing sections.

6) Cut and bend as required.

b. Install reinforcing at 16 inches OC vertically unless noted otherwise on

Drawings.

c. Install reinforcing 8 inches OC vertically for a minimum of 24 inches at starter courses.

2. Reinforcing Concrete Masonry:

a. At intersecting (interior/exterior or interior/interior) load-bearing walls, provide rigid steel anchors 16 inches OC vertically, embed ends in grout filled cores.

1) Alternate rigid steel anchors with horizontal joint reinforcing.

b. At intersecting non-load bearing walls or at intersecting (interior/exterior or interior/interior) load bearing/non-load bearing walls provide grout screen in mortar joint at 16 inches OC vertically.

1) Extend minimum 6 inches into each wall.

2) Alternate grout screen with horizontal joint reinforcing

c. Install vertical reinforcing bars where indicated on Drawings.

1) Provide means necessary to ensure position of vertical steel reinforcing meets requirements of Building Code.

d. Anchor intersecting concrete masonry (regardless of load bearing capacity) to intersecting concrete or concrete back-up using dovetail slots and anchors.

1) Provide dovetail anchors at 16 inches OC or as noted on Drawings.

3. Reinforcing veneer: (Not Used)