Masonry Magazine June 1983 Page. 18
MASONRY PANELS
continued from page 17
2. MORTAR AND GROUT: The day when prisms are made. Representative batches shall be sampled from mortar and grout. Three sets of cubes and cylinders each shall be molded from mortar and grout, cured for 7 days and tested per procedures outlined in ASTM C-91.
D. Brick shall be tested for every 50,000 brick quantity produced. Brick shall be tested in accordance with Sampling and Testing Brick and Structural Clay Tile, ASTM C-67. This test shall be performed and a report submitted by brick manufacturer at his own expense.
E. ASTM E-447 and ASTM E-518 tests shall be performed in a frequency reasonable to the job.
1.06 PRODUCT HANDLING
A. All masonry units, mortar and grout materials shall be stored above ground on level platforms to permit air circulation under stack. All materials shall be protected against weather.
B. All metal reinforcing accessories shall be stored above ground.
C. Masonry panels shall be preassembled under weather cover. Production area shall be protected against rain, wind, dust and direct sunlight and shall be heat controlled to prevent temperatures from dropping below 40°F.
D. Masonry panels shall be handled in such a manner as to assure against cracking, distortion, staining or other physical damage.
E. During curing, storage and transportation, the panels shall not be overstressed, warped or otherwise damaged. Panels unacceptably damaged shall be replaced.
1.07 SHOP DRAWINGS
A. Shop drawings shall include:
1. Masonry layout and dimensions with identification of each "Prefabricated Masonry Panel" to indicate its location in the building.
2. Detail cross-sections of typical members showing reinforcing bars, masonry ties, joint reinforcement, connection inserts. coursing, masonry bond, panel dimensions, size and shape of openings, drip, weep holes and other built-in items as specified in other sections, and
3. Details of all panel connecting arms to the supporting structural framing system. Details shall indicate the type and dimensions of field connection members and the type and size of welds and bolts.
1.08 SAMPLE PANEL
A. Preassemble a full size sample of one typical panel using mortar color, texture of face brick, brick, quality of workmanship, procedures, equipment and jigs established for the production run. This sample panel shall be prefabricated in strict accord with approved shop drawings and specifications. The Architect shall inspect and approve the sample panel at the manufacturer's production facilities. The sample panel shall be clearly marked as the approved sample and shall remain at the production facilities as a basis for maintaining a quality control of succeeding panels, until directed by the Architect to be incorporated into the building.
2.00 PRODUCT
2.01 BRICK
A. Face brick may be solid brick meeting ASTM C-216 or hollow brick meeting ASTM C-652 conforming to UBC recommendation No. 3118 when applicable.
B. Brick shall be as manufactured by
2.02 BLOCK
A. C.M.U. shall meet requirements of ASTM C-90.
B. Block shall be as manufactured by
2.03 STEEL
A. Steel reinforcement shall conform to ASTM A-615.
B. Joint reinforcement bars shall comply with ASTM A-82, mill galvanized conforming to ASTM A-116, Class I.
C. Structural steel shall conform to ASTM A-36. All embedded inserts and panel connecting arms shall have one coat of red- oxide primer or approved equal.
D. Unfinished bolts and nuts shall conform to ASTM A-307.
2.04 MORTAR AND GROUT
A. MORTAR:
1. Shall conform to ASTM C-270 Type "S" or mix proportions as follows:
a. 1 part by volume of Portland Cement, gray and/or white, Type III or Type I, conforming to ASTM C-150, and
b. Sand, conforming to ASTM C-144, 2% to 3 parts by the sum of the volumes of the cementitious materials.
2. Any additives used to increase the strengths of mortar shall be approved by the Architect.
3. All face brick shall be laid with colored mortar matching
If coloring pigments are used for colored mortar:
a. All mortar coloring shall be factory mixed, bagged and labeled. These colorings shall be made from only inorganic materials blended to produce a permanent color. These coloring materials must be alkali resistant, light-fast, inert chemically, water insoluble and uniform in coloration.
b. Mortar pigments shall shall be added to the mortar in accordance with the proportions recommended by the color manufacturer. Pigments shall not exceed 10% of the weight of the cement except carbon black, if used, shall not exceed 3%.
e. Colored mortar shall be mixed to produce uniform color throughout the job.
B. GROUT:
1. Shall be fine grout per ASTM C-476 and shall be proportioned as follows:
a. 1 part by volume of Portland Cement, gray, type III or type I, and
b. Sand, 2% to 3 parts by the sum of the volumes of the cementitious materials.
3.00 EXECUTION
3.01 PREFABRICATION
A. Panels shall be preassembled in the plant using procedures, equipment and jigs used when making the sample panel.
B. Set masonry units plumb, true to line and maintaining all joints in alignment. Proceed in vertical direction, with each succeeding course laid on top of the previous one.
CAVEAT-These guidelines are for general recommended practices and may not be applicable to a particular project. Independent research should be undertaken by the installing contractor.
18 MASONRY-MAY/JUNE, 1983