When the the guardrail is installed in configuration other than described in the installation instructions, the installation configuration and fastening detail must be specified by a licensed engineer. William’s 1/4” tempered glass panel system (ANSI Z97.1 tempered glass) has been evaluated with a total railing span of 72” with a Williams secured to a concrete substrate with a 4-ITW Redhead anchors LDT 3824 ⅜”x2½”. The Williams aluminum railing systems have been evaluated with ½”x¾” aluminum balusters (6063-T5) assembled using the patented Interlocking assembly process by which guardrail infill components are press locked together. William’s Colonial 42” aluminum railings were evaluated with a total railing span of 96” with a William 3” post attached at each end and secured to a structural wood frame with four GRK RSS ⁵/₁₆”圆” deck structural screws per post. Acceptance criteria for handrails and guards approved February 2008 and effective Ma(editorially revised January 2012). Williams Architectural Products (Williams) railing products have been evaluated for structural integrity by an independent laboratory as per ICC-ES AC273
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