CSA S852-18 pdf download – Blast-resistant window anchor systems.
ASTM International F1642-12 Standard Test Method for Glazing and Glazing Systems Subject to Airblast Loadings BSI (British Standards Institution) BS EN 572-1:2004 Glass in building. Basic soda lime silicate glass products. Definitions and general physical and mechanical properties GSA (General Services Administration) TSO1-2003 Standard Test Method for Glazing and Window Systems Subject to Dynamic Overpressure Loadings ISO (International Organization for Standardization) 16933:2007 Glass in building — Explosion-resistant security glazing — Test and classification for arena air-blast loading 16934:2007 Glass in building — Explosion-resistant security glazing — Test and classification by shock-tube loading Other publications Alameer, A., Elnabelsy, G., Jacques, E., Saatcioglu, M. and Foo, S. 2017a. Tests of blast-resistant windows. Research report, Hazard Mitigation and Disaster Management Research Centre, University of Ottawa, Ottawa, Canada. Alameer, A., Elnabelsy, G., Jacques, E., Saatcioglu, M. and Foo, S. 2018. “Performance of window retention anchors on reinforced concrete and structural steel substrates”. International Journal of Protective Structures. Submitted for publication, 2018.
3 Definitions, abbreviations, and symbols 3.1 Definitions The following definitions shall apply in this Standard: Anchor — the means of attachment of the window component to the structure, composed of the fastener and the anchorage. Anchorage strength — the strength of the anchorage to resist disengagement from the substrate. Anchorage — the means of attachment of the component to the structure. Attached film configuration — film that is secured to a window frame with either a batten/mechanical anchorage system or with structural silicone. Notes: 1) Film can be attached to the frame on two opposite sides or on all four sides. 2) Film in an attached configuration typically requires an upgrade for the connections between the window frame and the surrounding substrate since the batten system and silicone attachment will transfer significantly more load into the frame than the existing frame-to-wall connection was designed for. Authority having jurisdiction (AHJ) — a federal, provincial, or municipal ministry, department, board, agency, or commission that is responsible for regulating by statute the requirements of a code or standard, or use of products, materials, or services. Blast — a transient change in the gas density, pressure, and velocity of the air surrounding an explosion point. Note: The initial change can be either discontinuous or gradual. A rapid discontinuous change is referred to as a shock wave. A more gradual change is known as a pressure wave. Blast load — the load resulting from the overpressure and drag forces from the blast wave. Connection — the means by which two or more components are attached to each other. Critical section — the interface of the anchorage and fastener Daylight (unattached) film configuration — a film that is applied to the face of the glazing but is not attached to the window frame.
4 Performance criteria 4.1 Performance objectives The performance objectives of blast-resistant window anchor systems shall be in compliance with Clauses 4.3.4 and 4.3.5 of CSA S850. 4.2 Performance requirements 4.2.1 4.2.1.1 The blast design of window retention anchors on new or retrofitted blast-resistant substrates shall conform to the principles of balanced design specified in Clause 11.2.3 of CSA S850 and the requirements of Clauses 4.2.1.2 and 4.2.1.3. 4.2.1.2 The supporting substrates of window systems shall have higher capacity than the window system and its connections to the substrate. 4.2.1.3 The strength of window retention anchors connecting the window system to the supporting substrates shall have higher structural capacity than the strength of the window system by a minimum factor of safety of 1.5. 4.2.1.4 The margin of safety required in Clause 4.2.1.3 can be provided by using factored design forces as described in Clause 6.2.2. 4.2.2 Windows on unretrofitted substrates, potentially having higher blast resistance than the attached substrate, or windows that have overstrengths necessitated by other functional requirements (e.g., ballistic windows) shall have performance objectives established by the building owner or by the authority having jurisdiction over the building, provided that the safety of the occupants is ensured. 4.2.3 The window retention anchors shall have sufficient strength to maintain their integrity during elastic window response prior to glass breakage, as well as inelastic response beyond the glass breakage, including the effects of the membrane action.CSA S852-18 pdf download.
