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Title: Section 2110  •  Size: 5287

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2110.1 General. Masonry of glass blocks may be used in nonload-bearing exterior or interior walls and in openings which might otherwise be filled with windows, either isolated or in continuous bands, provided the glass block panels have a minimum thickness of 3 inches (76 mm) at the mortar joint and the mortared surfaces of the blocks are treated for mortar bonding. Glass block may be solid or hollow and may contain inserts.

2110.2 Mortar Joints. Glass block shall be laid in Type S or N mortar. Both vertical and horizontal mortar joints shall be at least 1/4 inch (6 mm) and not more than 3/8 inch (10 mm) thick and shall be completely filled. All mortar contact surfaces shall be treated to ensure adhesion between mortar and glass.

2110.3 Lateral Support. Glass panels shall be laterally supported along each end of the panel.

Lateral support shall be provided by panel anchors spaced not more than 16 inches (406 mm) on center or by channels. The lateral support shall be capable of resisting the horizontal design forces determined in Chapter 16 or a minimum of 200 pounds per lineal foot (2920 N per linear meter) of wall, whichever is greater. The connection shall accommodate movement requirements of Section 2110.6.

2110.4 Reinforcement. Glass block panels shall have joint reinforcement spaced not more than 16 inches (406 mm) on center and located in the mortar bed joint extending the entire length of the panel. A lapping of longitudinal wires for a minimum of 6 inches (153 mm) is required for joint reinforcement splices. Joint reinforcement shall also be placed in the bed joint immediately below and above openings in the panel. Joint reinforcement shall conform to U.B.C. Standard 21-10, Part I. Joint reinforcement in exterior panels shall be hot-dip galvanized in accordance with U.B.C. Standard 21-10, Part I.

2110.5 Size of Panels. Glass block panels for exterior walls shall not exceed 144 square feet (13.4 ) of unsupported wall surface or 15 feet (4572 mm) in any dimension. For interior walls, glass block panels shall not exceed 250 square feet (232 ) of unsupported area or 25 feet (7620 mm) in any dimension.

2110.6 Expansion Joints. Glass block shall be provided with expansion joints along the sides and top, and these joints shall have sufficient thickness to accommodate displacements of the supporting structure, but not less than 3/8 inch (19.5 mm). Expansion joints shall be entirely free of mortar and shall be filled with resilient material.

2110.7 Reuse of Units. Glass block units shall not be reused after being removed from an existing panel.

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