{"id":501,"count":5,"description":"Ideal for the main function of glass blocks - the passage of light through external and internal walls. The Standard Pattern of Glass Blocks Clear Blocks have a light transmission value of 80% with additional benefits of reducing sound by 37dB, thermal insulation (U-value) 3.0 Wm-2K-1, Solar energy Characteristics (g) 79% and compressive strength of &gt; 9 MPa.  When installed in accordance to test reports they are capable of achieving Fire Rating Levels of FRL \/60\/-.","link":"https:\/\/www.glassblockconstruction.com\/product-category\/standard-blocks\/","name":"Standard Blocks","slug":"standard-blocks","taxonomy":"product_cat","parent":0,"meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Standard Blocks Archives | Glass Block Constructions<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.glassblockconstruction.com\/product-category\/standard-blocks\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Standard Blocks Archives | Glass Block Constructions\" \/>\n<meta property=\"og:description\" content=\"Ideal for the main function of glass blocks &#8211; the passage of light through external and internal walls. The Standard Pattern of Glass Blocks Clear Blocks have a light transmission value of 80% with additional benefits of reducing sound by 37dB, thermal insulation (U-value) 3.0 Wm-2K-1, Solar energy Characteristics (g) 79% and compressive strength of &gt; 9 MPa. 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The Standard Pattern of Glass Blocks Clear Blocks have a light transmission value of 80% with additional benefits of reducing sound by 37dB, thermal insulation (U-value) 3.0 Wm-2K-1, Solar energy Characteristics (g) 79% and compressive strength of &gt; 9 MPa. 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