PrefaceThis is the first edition of CSA S851, Post-blast safety evaluation of buildings.Scope1.1 This Guideline specifies procedures for the assessment of the safety of the structural and architectural components of a building affected by a blast event. 1.2 This Guideline does not contain procedures for assessing all post-blast hazards or pre-existing risks, but they should be considered. 1.3 The principles and criteria of post-blast assessment may be incorporated into existing emergency response protocols. 1.4 In this Guideline, "should" is used to express a recommendation or that which is advised but not required; "may" is used to express an option or that which is permissible within the limits of the Guideline; and "can" is used to express possibility or capability.