CSA S852:18 (R2023)

Preface This is the first edition of CSA S852, Blast-resistant window anchor systems. This Standard is intended for use in the design and assessment of anchor systems for windows that have been designed to resist defined blast threats. This Standard applies to both new and existing buildings. While building security (which includes window security), within the context of building protection against blast threats, is beyond the scope of this Standard, it is an essential aspect to evaluating or modifying the design threat and thus must be well understood by the designer. Although not specifically identified, users should be aware that the authority having jurisdiction might have additional approval requirements, which are outside of the scope of this Standard. See Clause A.1 for additional information on regulatory compliance. The development of this Standard was supported by the Canadian Safety and Security Program (CSSP- 2014-CP-2011). This Standard was prepared by the Subcommittee on Blast-Resistant Window Anchor Systems, under the direction of the Technical Committee on Blast-Resistant Buildings, and under the jurisdiction of the Strategic Steering Committee on Construction and Civil Infrastructure, and has been formally approved by the Technical Committee. This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. Scope 1.1 General This Standard provides criteria for the design of blast-resistant window anchor systems for use in new or existing buildings. 1.2 Window types considered 1.2.1 General The design criteria included in this Standard are intended for anchoring windows with glass types specified in Clause 1.2.2 and frame types specified in Clause 1.2.3, anchored on substrates specified in Clause 1.2.3. 1.2.2 Glass types The design criteria included in this Standard are intended for anchoring windows with the following glass types: a) thermally tempered or heat-strengthened glass with or without security film installed on the interior surface and anchored to the window frame; b) annealed glass with security film installed on the interior surface and anchored to the window frame; and c) laminated thermally tempered, laminated heat-strengthened, or laminated annealed glass. Note: Often security film is installed on the interior surface, anchored or not, to prevent glass spalling and fragmenting. 1.2.3 Frame types 1.2.3.1 The design criteria included in this Standard are intended for anchoring windows with the following frame types: a) punched windows; b) curtain walls; and c) ribbon windows. 1.2.3.2 The design criteria included in this Standard are intended for anchoring windows with the following frame materials: a) aluminum; b) steel; and c) wood. 1.2.4 Substrates The design criteria included in this Standard are intended for anchoring windows on the following substrates: a) structural steel; b) reinforced concrete; c) concrete, brick, or stone masonry; and d) any other substrate that can be demonstrated through analysis or tests to be capable of supporting the attached window system, as per Clause 7. 1.3 Anchor load transfer Window retention anchors are attached to substrates utilizing one or more of the following force transfer mechanisms: a) friction; b) bearing; and c) bond or adhesion. 1.4 Anchors not included Window retention anchors with load transfer mechanisms not included in Clause 1.3 are not used unless it has been demonstrated by tests conforming to Clause 7 that they meet the performance criteria of Clause 4. 1.5 Terminology In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.