2. Full Brick Units: Install <Galvanized> <Type 304 stainless steel> dovetail slots in precast:
not less than 0.5 mm thick, felt or fiber filled or cover face opening of slots. Attach brick units
with wire anchors, ASTM A82 or B227, Grade 30HS not less than 3/16 inch (W2.8) in diameter
and hooked on one end and looped through a 7/8 in. (25 mm) wide, 12-gage (2.68 mm) steel
sheet bent over the wire with dovetail on opposite end.
STONE MATERIALS AND ACCESSORIES
Retain this Article if stone facing is required. Material, fabrication, and finish requirements are usually specified in Division 4 Section “Dimension Stone Cladding.” Replace first paragraph below with stone requirements, if preferred.
Stone facing for architectural precast concrete is specified in Division 4 Section “Dimension Stone Cladding.”
Tolerance of length and width of +0, -1/8 inch (+0, -3mm).
Anchors are generally supplied by stone fabricator or, in some cases, by precaster. Specify supplier.
Anchors may be toe-in, toe-out, or dowels.
Anchors: Stainless steel, ASTM A 666, Type 304, of temper and diameter required to support loads without exceeding allowable design stresses.
Grommets will usually be required if filling dowel holes with rigid epoxy.
Fit each anchor leg with 60 durometer neoprene grommet collar of width at least twice the diameter and of length at least five times the diameter of the anchor.
Sealant Filler: ASTM C 920, low-modulus, multicomponent, nonsag urethane sealant complying with requirements in Division 7 Section ”Joint Sealants” and that is nonstaining to stone substrate.
Dowel hole filling is used to prevent water intrusion into stone and future discoloration at anchor locations. Retain paragraph above for a flexible filler or paragraph below for a rigid filler.
Epoxy Filler: ASTM C 881, 100 percent solids, sand –filled non-shrinking, non -staining of type, class, and grade to suit application.
Preformed, compressible, resilient, nonstaining, nonwaxing, closed-cell polyethylene foam pad, nonabsorbent to liquid and gas, 1/8 inch (3.2 mm) thick.
Polyethylene sheet, 6 to 10 mil thick.
INSULATED PANEL ACCESSORIES
Retain this Article if integrally, insulated, architectural precast concrete panels are required. State desired minimum aged R-value or insulation thickness required, or both. Select insulation material from one of the three following paragraphs; if using more then one type identify location. As