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	SECTION 04270
	GLASS UNIT MASONRY
	** NOTE TO SPECIFIER ** Pittsburgh Corning Corporation; hollow and solid glass blocks, accessories, and mortar. This section is based on the products of Pittsburgh Corning Corporation, which is located at: 800 Presque Isle Drive Pittsburgh, PA 15239-2799 Tel: (800) 624-2120 Tel: (724) 327-6100 Fax: (724) 325-9704 Website: www.pittsburghcorning.com [ Additional Product Data ] Pittsburgh Corning Corporation is a leading U.S. supplier of building materials to worldwide markets and has been in business for the last 65 years. The company's innovative glass block products are used extensively in industrial, commercial, and residential construction and renovation.
	PART 1	GENERAL
	1.1	SECTION INCLUDES
	** NOTE TO SPECIFIER ** Delete items below not required for project.
		A.	Glass block, hollow.
		B.	Glass block, solid.
		C.	Accessories.
		D.	Mortar.
	1.2	RELATED SECTIONS
	** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
		A.	Section 05500 - Metal Fabrications: Steel channels, sills, lintels, and jambs.
		B.	Section 07900 - Joint Sealers.
	1.3	REFERENCES
	** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
		A.	ASTM A 82 - Standard Specification for Steel Wire, Plain, for Concrete Reinforcement.
		B.	ASTM A 153 - Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware.
		C.	ASTM C 144 - Standard Specification for Aggregate for Masonry Mortar.
		D.	ASTM C 150 - Standard Specification for Portland Cement.
		E.	ASTM C 207 - Standard Specification for Hydrated Lime for Masonry Purposes.
		F.	ASTM C 270 - Standard Specification for Mortar for Unit Masonry.
		G.	ASTM D 1187 - Standard Specification for Asphalt-Base Emulsions for Use as Protective Coatings for Metal.
		H.	ASTM D 1227 - Standard Specification for Emulsified Asphalt Used as a Protective Coating for Roofing.
		I.	ASTM E 163 - Standard Methods of Fire Tests of Window Assemblies.
		J.	CAN 4-S106 - Fire Test of Window and Glass Block Assemblies.
		K.	UL 9 - Standard for Fire Tests of Window Assemblies.
	1.4	SUBMITTALS
		A.	Submit under provisions of Section 01300.
		B.	Product Data: Manufacturer's literature on each product to be used, including:
			1.	Preparation instructions and recommendations.
			2.	Storage and handling requirements and recommendations.
			3.	Installation methods.
		C.	Verification Samples:
			1.	Two glass block units of each type specified, showing size, design, and pattern of faces.
			2.	Representative samples of panel reinforcing, panel anchors, expansion strips, and sealant, as required for project.
	** NOTE TO SPECIFIER ** Not all glass block units have been assigned fire ratings.
		D.	Fire Test Reports: Submit documents verifying glass block units are classified for the specified fire exposure according to ASTM E 163, CAN 4-S106, or UL 9 "Fire Tests of Window Assemblies." Label cartons of tested units with appropriate UL label.
	1.5	DELIVERY, STORAGE, AND HANDLING
		A.	Store products in manufacturer's unopened packaging in clean, cool, dry area until ready for installation.
		B.	Protect opened cartons of glass block against windblown rain or water run-off with tarpaulins or plastic covering.
	1.6	PROJECT CONDITIONS
		A.	Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
		B.	Do not install glass block units when temperature is 40 degrees F (4 degrees C) and falling.
	1.7	WARRANTY
		A.	Glass Block Units: Limited 5 year warranty on product only.
	PART 2	PRODUCTS
	2.1	MANUFACTURERS
		A.	Acceptable Manufacturer: Pittsburgh Corning Corporation, which is located at: 800 Presque Isle Dr. ; Pittsburgh, PA 15239-2799; Toll Free Tel: 800-624-2120; Tel: 724-327-6100; Fax: 724-325-9704; Email: request info; Web: www.pittsburghcorning.com
	** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
		B.	Substitutions: Not permitted
		C.	Requests for substitutions will be considered in accordance with provisions of Section 01600.
	** NOTE TO SPECIFIER ** Select the glass block required from the following paragraphs. If more than one type is required, clearly indication the location of each on the Drawings. Delete the paragraphs not required.
	2.2	GLASS BLOCK
		A.	Glass Block: General.
			1.	Finish: Polyvinyl butyral edge coating.
	** NOTE TO SPECIFIER ** Delete one of the following two paragraphs. Panel anchor construction is not permitted for 90 minute fire rated glass blocks.
			2.	Framing: Framed and anchored with channel-type restraints.
			3.	Framing: Framed and anchored using panel anchor construction.
		B.	Glass Block: PC Standard Premiere Series block; hollow; 3-7/8 inches (98 mm) thick.
			1.	Physical Properties:
				a.	Face Size: Actual face size is 1/4 inch (6 mm) less than nominal.
				b.	Weight Installed With Mortar: 20 lb/sq ft (98 kg/sq m).
				c.	Thermal Conductance (U Value): 0.51 Btu/hr sq ft deg F (2.9 W/sq m K); winter night.
				d.	Thermal Resistance (R Value): 1.96 deg F hr sq ft/Btu (0.35 (K sq m)/W).
				e.	Visible Light Transmission: 75 percent.
				f.	Shading Coefficient: 0.65.
				g.	Fire Rating: 45 minute rated window assemblies for panels in masonry walls up to 120 sq ft (11 sq m) with maximum height or width of 12 feet (3658 mm); and for panels in non-masonry walls up to 94 sq ft (9 sq m) with maximum height or width of 10.75 feet (3277 mm); rating does not apply to all 12 inch (305 mm) by 12 inch (305 mm) blocks.
	** NOTE TO SPECIFIER ** Delete the following sound transmission paragraphs not required by project.
				h.	Sound Transmission: 37 for size 6 inches (152 mm) by 6 inches (152 mm), unless otherwise indicated.
				i.	Sound Transmission: 39 for size 8 inches (203 mm) by 8 inches (203 mm), unless otherwise indicated.
				j.	Sound Transmission: 35 for size 12 inches (305 mm) by 12 inches (305 mm), unless otherwise indicated.
				k.	Sound Transmission: No rating for sizes not square.
	** NOTE TO SPECIFIER ** Delete the following pattern paragraphs if not required; if more than one is specified, indicate where each is to be used.
			2.	Pattern: ARGUS.
	** NOTE TO SPECIFIER ** Actual size is 1/4 inch (6 mm) less than nominal. Delete two of the following three size paragraphs; if more than one is specified, indicate where each is to be used.
				a.	Face Size: 6 inches (152 mm) by 6 inches (152 mm), nominal.
				b.	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal.
				c.	Face Size: 12 inches (305 mm) by 12 inches (305 mm), nominal.
			3.	Pattern: ARGUS Parallel Fluted Block.
				a.	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal.
			4.	Pattern: DECORA.
	** NOTE TO SPECIFIER ** Delete all but one of the following paragraphs. If more than one is specified, indicate where each is to be used.
				a.	Face Size: 6 inches (152 mm) by 6 inches (152 mm), nominal.
				b.	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal.
				c.	Face Size: 12 inches (305 mm) by 12 inches (305 mm), nominal.
				d.	Face Size: 4 inches (102 mm) by 8 inches (203 mm), nominal.
				e.	Face Size: 6 inches (152 mm) by 8 inches (203 mm), nominal.
			5.	Pattern: ESSEX AA.
				a.	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal.
				b.	Visible Light Transmission: 50 percent.
				c.	Shading Coefficient: 0.45.
			6.	Pattern: IceScapes.
	** NOTE TO SPECIFIER ** Delete all but one of the following paragraphs. If more than one is specified, indicate where each is to be used.
				a.	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal.
				b.	Face Size: 4 inches (102 mm) by 8 inches (203 mm), nominal.
				c.	Face Size: 6 inches (152 mm) by 8 inches (203 mm), nominal.
			7.	Pattern: SPYRA.
				a.	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal.
			8.	Pattern: VUE.
	** NOTE TO SPECIFIER ** Delete all but one of the following paragraphs. If more than one is specified, indicate where each is to be used.
				a.	Face Size: 6 inches (152 mm) by 6 inches (152 mm), nominal.
				b.	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal.
				c.	Face Size: 12 inches (305 mm) by 12 inches (305 mm), nominal.
				d.	Face Size: 4 inches (102 mm) by 8 inches (203 mm), nominal.
				e.	Face Size: 6 inches (152 mm) by 8 inches (203 mm), nominal.
			9.	Pattern: DECORA "LX" FILTER; with fibrous glass insert.
	** NOTE TO SPECIFIER ** Delete two of the following three face size paragraphs. If more than one is specified, indicate where each is to be used.
				a.	Face Size: 6 inches (152 mm) by 6 inches (152 mm), nominal; no sound transmission rating.
				b.	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal; sound transmission: 40.
				c.	Face Size: 12 inches (305 mm) by 12 inches (305 mm), nominal; no sound transmission rating.
				d.	Thermal Conductance (U Value): 0.48 Btu/hr sq ft deg F (2.7 W/sq m K); winter night.
				e.	Thermal Resistance (R Value): 2.06 deg F hr sq ft/Btu (0.36 (K sq m)/W).
				f.	Visible Light Transmission: 50 to 55 percent.
				g.	Shading Coefficient: 0.45 to 0.50.
		C.	Glass Block: PC THICKSET Series block; hollow; 3-7/8 inches (98 mm) thick.
			1.	Physical Properties:
				a.	Face Size: Actual face size is 1/4 inch (6 mm) less than nominal.
				b.	Thermal Conductance (U Value): 0.51 Btu/hr sq ft deg F (2.9 W/sq m K); winter night.
				c.	Thermal Resistance (R Value): 1.96 deg F hr sq ft/Btu (0.35 (K sq m)/W).
				d.	Visible Light Transmission: 75 percent.
				e.	Shading Coefficient: 0.65.
				f.	Fire Rating: Maximum 90 minute rated window assemblies for panels in masonry walls up to 100 sq ft (9 sq m) with maximum height or width of 10 feet (3048 mm); maximum 60 minute rated window assemblies for panels in non-masonry walls up to 94 sq ft (9 sq m) with maximum height or width of 10.75 feet (3277 mm); rating does not apply to all 12 inch (305 mm) by 12 inch (305 mm) blocks.
	** NOTE TO SPECIFIER ** Delete the following acceptable product paragraphs if not required. If more than one is specified, indicate where each is to be used.
			2.	Acceptable Product: THICKSET 60 Block.
	** NOTE TO SPECIFIER ** Delete one of the following two patterns. If more than one is specified, indicate where each is to be used.
				a.	Pattern: DECORA.
					1)	Visible Light Transmission: 49 percent.
					2)	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal; sound transmission: 48.
					3)	Weight Installed With Mortar: 25 lb/sq ft (146 kg/sq m).
					4)	Fire Rating: Maximum 60 minute rated window assemblies for panels in masonry walls up to 100 sq ft (9 sq m) with maximum height or width of 10 feet (3048 mm).
				b.	Pattern: VUE.
					1)	Visible Light Transmission: 75 percent.
					2)	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal; sound transmission: 48.
					3)	Weight Installed With Mortar: 25 lb/sq ft (146 kg/sq m).
					4)	Fire Rating: Maximum 60 minute rated window assemblies for panels in masonry walls up to 100 sq ft (9 sq m) with maximum height or width of 10 feet (3048 mm).
				c.	Pattern: Essex AA.
					1)	Visible Light Transmission: 50 percent.
					2)	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal; sound transmission: 48.
					3)	Weight Installed With Mortar: 25 lb/sq ft (146 kg/sq m).
					4)	Fire Rating: Maximum 60 minute rated window assemblies for panels in masonry walls up to 100 sq ft (9 sq m) with maximum height or width of 10 feet (3048 mm).
			3.	Acceptable Product: PC THICKSET 90 Block.
				a.	Pattern: DECORA.
					1)	Face Size: 6 inches (152 mm) by 6 inches (152 mm), nominal; sound transmission: 50.
					2)	Weight Installed With Mortar: 30 lb/sq ft (146 kg/sq m).
					3)	Visible Light Transmission: 38 percent.
			4.	Acceptable Product: PC THICKSET 90 Block.
	** NOTE TO SPECIFIER ** Delete two of the following three pattern paragraphs. If more than one is specified, indicate where each is to be used.
				a.	Pattern: DECORA.
					1)	Visible Light Transmission: 38 percent.
	** NOTE TO SPECIFIER ** Delete one of the following two face size paragraphs. If more than one is specified, indicate where each is to be used.
					2)	Face Size:
					3)	6 inches (152 mm) by 6 inches (152 mm), nominal; sound transmission: 50.
					4)	8 inches (203 mm) by 8 inches (203 mm), nominal; sound transmission: 50.
					5)	Weight Installed With Mortar: 30 lb/sq ft (146 kg/sq m).
				b.	Pattern: VUE.
					1)	Visible Light Transmission: 70 percent.
					2)	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal; sound transmission: 50.
					3)	Weight Installed With Mortar: 30 lb/sq ft (146 kg/sq m).
				c.	Pattern: ENDURA.
					1)	Visible Light Transmission: 38 percent.
					2)	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal; sound transmission: 50.
					3)	Weight Installed With Mortar: 30 lb/sq ft (146 kg/sq m).
		D.	Glass Block: PC Thinline Series block; hollow; 3-1/8 inches (79 mm) thick.
			1.	Physical Properties: Applies to all Thinline Series unless otherwise indicated.
				a.	Face Size: Actual face size is 1/4 inch (6 mm) less than nominal.
				b.	Weight Installed With Mortar: 16 lb/sq ft (78 kg/sq m).
				c.	Thermal Conductance (U Value): 0.57 Btu/hr sq ft deg F (3 W/sq m K); winter night.
				d.	Thermal Resistance (R Value): 1.75 deg F hr sq ft/Btu (0.31 (K sq m)/W).
				e.	Visible Light Transmission: 75 percent.
				f.	Shading Coefficient: 0.65.
				g.	Fire Rating: 45 minute rated window assemblies for panels in masonry walls up to 120 sq ft (11 sq m) with maximum height or width of 12 feet (3658 mm); and for panels in non-masonry walls up to 94 sq ft (9 sq m) with maximum height or width of 10.75 feet (3277 mm), unless otherwise indicated; rating does not apply to DELPHI pattern blocks.
			2.	Pattern: DECORA.
	** NOTE TO SPECIFIER ** Delete all but one of the following paragraphs. If more than one is specified, indicate where each is to be used.
				a.	Face Size: 6 inches (152 mm) by 6 inches (152 mm), nominal.
				b.	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal.
				c.	Face Size: 4 inches (102 mm) by 8 inches (203 mm), nominal.
				d.	Face Size: 6 inches (152 mm) by 8 inches (203 mm), nominal.
			3.	Pattern: IceScapes.
	** NOTE TO SPECIFIER ** Delete all but one of the following paragraphs. If more than one is specified, indicate where each is to be used.
				a.	Face Size: 6 inches (152 mm) by 6 inches (152 mm), nominal; no fire rating.
				b.	Face Size: 6 inches (152 mm) by 8 inches (203 mm), nominal.
				c.	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal.
			4.	Pattern: DELPHI; no fire rating.
	** NOTE TO SPECIFIER ** Delete all but one of the following paragraphs. If more than one is specified, indicate where each is to be used.
				a.	Face Size: 6 inches (152 mm) by 6 inches (152 mm), nominal.
				b.	Face Size: 8 inches (203 mm) by 8 inches (203 mm), nominal.
				c.	Face Size: 4 inches (102 mm) by 8 inches (203 mm), nominal.
				d.	Face Size: 6 inches (152 mm) by 8 inches (203 mm), nominal.
		E.	Glass Block: PC VISTABRIK solid glass block.
			1.	Physical Properties:
				a.	Weight Installed With Mortar: 40 lb/sq ft (195 kg/sq m).
				b.	Thermal Conductance (U Value): 0.87 Btu/hr sq ft deg F (5 W/sq m K); winter night.
				c.	Thermal Resistance (R Value): 1.15 deg F hr sq ft/Btu (0.2 (K sq m)/W).
				d.	Visible Light Transmission: 80 percent.
				e.	Fire Rating: Maximum 90 minute rated window assemblies for panels in masonry walls up to 100 sq ft (9 sq m) with maximum height or width of 10 feet (3048 mm); maximum 60 minute rated window assemblies for panels in non-masonry walls up to 94 sq ft (9 sq m) with maximum height or width of 10.75 feet (3277 mm); rating does not apply to 8 inch (197 mm) by 8 inch (197 mm) by 1-1/2 inch (38 mm) blocks.
				f.	Sound Transmission: No rating for VISTABRIK Block unless otherwise indicated.
	** NOTE TO SPECIFIER ** Delete one of the following two paragraphs. If more than one is specified, indicate where each is to be used.
			2.	Pattern: Clear.
	** NOTE TO SPECIFIER ** Select one of the following two size paragraphs and delete the one not required. If more than one is specified, indicate where each is to be used.Face size is 3/8 inch (10 mm) less than nominal; thickness dimensions are actual.
				a.	Size: Face, 8 inches (203 mm) by 8 inches (203 mm), nominal; thickness, 3 inches (76 mm); sound transmission: 53.
				b.	Size: Face, 3 inches (76 mm) by 8 inches (203 mm), nominal; thickness, 3 inches (76 mm).
				c.	Size: Face, 4 inches (102 mm) by 8 inches (203 mm), nominal; thickness, 3 inches (76 mm).
			3.	Pattern: Stipple finish.
	** NOTE TO SPECIFIER ** Face size is 3/8 inch (10 mm) less than nominal; thickness dimensions are actual.
				a.	Size: Face, 8 inches (203 mm) by 8 inches (203 mm), nominal; thickness, 3 inches (76 mm); sound transmission: 53.
		F.	Specially Shaped Glass Block: Premiere Series finishing units; no fire rating.
			1.	Pattern: Decora
			2.	Pattern: Icecapes
	** NOTE TO SPECIFIER ** Delete the following paragraphs if not required. If more than one is specified, indicate where each is to be used. Face size is 1/4 inch (6 mm) less than nominal; thickness dimensions are actual.
			3.	End Blocks: PC EndBlock; rounded end; face, 8 inches (203 mm) long by 8 inches (203 mm) high, nominal; thickness 3-7/8 inches (98 mm).
			4.	End Blocks: PC EndBlock; rounded end; face, 6 inches (152 mm) long by 8 inches (203 mm) high, nominal; thickness, 3-7/8 inches (98 mm).
			5.	Corner Units: PC HEDRON; Hexagonal cylinder; face, 6 inches (152 mm) total width, by 8 inches (203 mm) high, nominal; single face 3-7/8 inches (98 mm) wide.
			6.	Corner Units, 45 degree: PC TRIDRON; one face, 1-1/2 inches (32 mm) wide by 8 inches (203 mm) high, nominal; two faces, 2-1/4 inches (57 mm) wide by 8 inches (203 mm) high; thickness 3-7/8 inches (98 mm).
			7.	Blocks for Curved Corners: PC ARQUE; one face 4-1/2 inches (114 mm) wide by 8 inches (98 mm) high, nominal; one face, 6 inches (152 mm) wide by 8 inches (98 mm) high; thickness, 3-7/8 inches (98 mm).
			8.	Blocks with Rounded Corners: PC ENCURVE; face, 8 inches (203 mm) long by 8 inches (203 mm) high, nominal; thickness, 3-7/8 inches (98 mm).
			9.	ThinLine End Blocks: PC EndBlock; face, 6 inches (95 mm) long by 8 inches (203 mm) high, nominal; thickness, 3-1/8 inches (79 mm); for DECORA Thinline Series pattern only.
		G.	Solar Reflective Glass Block: PC SRT Block; reflective metal oxide coating on inside.
			1.	Physical Properties:
				a.	Weight Installed with Mortar: 20 lb/sq ft (98 kg/sq m).
				b.	Visible Light Transmission: 30 percent.
	** NOTE TO SPECIFIER ** Select one of the following two paragraphs and delete the one not required.
			2.	Pattern: Clear.
				a.	Size: Face, 7-1/2 inches (190 mm) by 7-1/2 inches (190 mm), nominal; thickness, 3-3/4 inches (95 mm).
				b.	Thermal Conductance (U Value): 0.58 Btu/hr sq ft deg F (2 W/sq m K); winter night.
				c.	Thermal Resistance (R Value): 1.72 deg F hr sq ft/Btu (0.51 (K sq m)/W).
				d.	Solar Heat Gain Coefficient (SHGC): 0.40
			3.	Pattern: Wavy.
				a.	Size: Face, 7-1/2 inches (190 mm) by 7-1/2 inches (190 mm), nominal; thickness, 3-3/4 inches (95 mm).
				b.	Thermal Conductance (U Value): 0.57 Btu/hr sq ft deg F (2 W/sq m K); winter night.
				c.	Thermal Resistance (R Value): 1.75 deg F hr sq ft/Btu (0.51 (K sq m)/W).
				d.	Solar Heat Gain Coefficient (SHGC): 0.34
	2.3	ACCESSORIES
		A.	Panel Reinforcing: Two parallel 9 gage wires either 1-5/8 inches (41 mm) or 2 inches (51 mm) on center with electrically butt-welded crosswires spaced at regular intervals, galvanized after welding; complying with ASTM A 82 and ASTM A 153 or Stainless Steel in the same dimensions.
		B.	Panel Anchors: 20 gage perforated steel strips 24 inches (610 mm) long by 1-3/4 inches (44 mm) wide, hot dipped galvanized after perforation or 24 gage Stainless Steel 16 inches long (406 mm) by 1-3/4 inches (44 mm) wide.
		C.	Expansion Strips: Polyethylene foam with thickness of 3/8 inch (10 mm).
		D.	Asphalt Emulsion: Water-based; complying with ASTM D 1187 or D 1227 as applicable to substrate.
	** NOTE TO SPECIFIER ** Delete two of the following three paragraphs.
		E.	Sealant (caulk): Non-staining; waterproof mastic; silicone type; use fire rated sealant for fire rated assemblies.
		F.	Sealant (caulk): Non-staining; waterproof mastic; urethane type; use fire rated sealant for fire rated assemblies.
		G.	Sealant (caulk): Fire rated.
	** NOTE TO SPECIFIER ** Model building codes also accept the use of Type N mortar.
		H.	Mortar: Type S, in accordance with ASTM C 270; 1 part Portland Cement, 1/2 part lime, and sand to equal 2-1/4 to 3 times the amount of cementitious material, all measures by volume; add integral type waterproofer for exterior glass block panels; antifreeze compound or accelerators are unacceptable.
			1.	Portland Cement: Type 1, in accordance with ASTM C 150; omit integral type waterproofer if waterproof Portland Cement is used.
	** NOTE TO SPECIFIER ** Select one of the following two paragraphs. Insert color required if applicable. Delete the paragraph not required.
				a.	Color: ____________.
				b.	Color: As selected by architect from the manufacturer's full line of colors.
			2.	Lime: Type S, in accordance with ASTM C 207; use pressure hydrated dolomitic lime, providing that not less than 92 percent of active ingredients are completely hydrated.
			3.	Sand: Clean, white quartzite essentially free of iron compounds, in accordance with ASTM C 144; not less than 100 percent passing a No. 8 sieve.
			4.	Integral Type Water-Repellant: Stearate; as recommended by block manufacturer.
			5.	External Type Waterproofer: Water based silane sealer; as recommended by block manufacturer.
	PART 3	EXECUTION
	3.1	EXAMINATION
		A.	Do not begin installation until substrates have been properly prepared.
		B.	If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
		C.	Verify that structural members supporting glass blocks are designed for maximum deflection of L/600 under installed load.
		D.	Verify that panel anchors or channels for support at head and jambs are properly installed.
	3.2	PREPARATION
		A.	Clean surfaces thoroughly prior to installation.
		B.	Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
	3.3	INSTALLATION
		A.	Install in accordance with manufacturer's instructions with glass block set in full mortar bed with joint reinforcing at 16 inches (406 mm) on center and in joints immediately above and below openings.
		B.	Paint sills of all panels with heavy coat of asphalt emulsion and dry for minimum two hours before first mortar bed is placed.
		C.	Make provision for expansion and movement at jambs and heads of all panels; do not allow structural loads to bear on glad blocks.
		D.	Mix mortar and apply in accordance with manufacturer's recommendations.
	3.4	CLEANING
		A.	Remove excess sealer from glass surfaces immediately following application.
		B.	Remove excess mortar from faces of glass block at time joints are struck or tooled.
	3.5	PROTECTION
		A.	Protect installed products until completion of project.
		B.	Maintain temperature of glass unit masonry above 40 degrees Fahrenheit (4 degrees Celsius) for first 48 hours after construction.
		C.	Touch-up, repair or replace damaged products before Substantial Completion.
	END OF SECTION