• • • • • • Setting Blocks shall be provided in neoprene, EDPM or silicone as required for compatibility with glazing sealants, 80 to 90 Shore A durometer hardness, 100 mm minimum length, and in widths to suit glass thicknesses. Shims and spacers installed with setting blocks shall be of the same materials, hardness length and width as the edge blocks. Edge Blocks shall be provided in the same material as setting blocks, 50 to 60 Shore A durometer, of a size to limit lateral movement of glass. Preformed glazing tape shall be provided butyl compound tape with integral resilient tube spacer, 10 to 15 Shore A durometer hardness, width as required. Sealant shall be provided 1-part silicone type to BS EN ISO 11600 or alternatively sealant shall comply to the manufacturer’s specifications for interiors or exteriors as applicable. Glazing compounds shall be as follows: o For metal frames, a suitable type for application and, unless otherwise specified, in accordance with section, “Glazing Materials” of GANA (formerly FGMA) Glazing Manual. Metal sash putty, non-skinning compounds, non-resilient type preformed sealers, and preformed impregnated type gaskets shall not be permitted. When flexible vinyl gasket channels are used, material shall conform to ASTM D2287. o Compound used for glazing aluminium shall be pigmented with aluminium powder to match aluminium unit without staining or discolouring. It shall be non hardening, and shall be a type that does not require painting. o Glazing accessories as required to supplement items to be glazed and to provide a complete installation, including glazing points, clips, shims, angles, heads, setting blocks, and spacer strips. 1.1.16 Glass Blocks Glass blocks may be solid or hollow blocks with clear, coloured or obscured appearance and shall be manufactured in square or rectangular units on the product. A fire rating shall be supplied where indicated. Installation shall be in accordance with manufacturers instructions. 1.1.17 Obscured/Frosted Glass In double glazed units the obscured glass shall comprise the inner face of the inner pane. Obscuration shall be provided using sand blast, acid etching or surface pattern. 1.1.18 Spandrel Panel (pacified) Spandrel panel (pacified) shall be heat strengthened or tempered float glass with ceramic frit or silicone polyester enamel pacifier coating applied to surface. 1.1.19 Anti-Bandit Glass Anti-bandit glass shall comply with BS 5544 and shall be capable of resisting an assault with the use of an axe, crowbar or pickaxe and hinder entry to the protected area for a short period of time. The installation of this glass shall conform to BS 5357 and the manufacturer’s instructions. 1.1.20 Quality Control All glass shall be manufactured and processed in a factory operating a certified BS EN ISO 9001/ BS EN ISO 9002 quality management system. All glass shall be free of local defects (bubbles, inclusions), distortion and impurities. A thermal stress analysis shall be carried out, where required by the Engineer, for heat gain and shading stress. Page 7