CAN/CSA-A370-04 (R2014)
Connectors for Masonry
Product Details
Preface
This is the third edition of CSA A370, Connectors for masonry. It supersedes the previous editions published in 1994 and 1984.
Significant changes in this edition include the following:
(a) The annual driving rain index (aDRI) map in the 1994 edition has been replaced by , which provides annual driving rain indices for selected locations across Canada.
(b) Clause 5.2.1 and Table 5.1 divide Canada into three quantitative exposure environments based on the indices in . This division is comparable to the qualitative division (“sheltered”, “moderate”, and “severe”) in the 1994 edition.
(c) The aDRI value for distinguishing between sheltered and moderate environments has been reduced from 3 to 2.75.
(d) For exterior exposures, the level of corrosion protection for connectors is now based on the height of the masonry above building grade, rather than the building height. The height limit for determining the level of corrosion protection has also changed from 11 to 13 m.
(e) The designators for levels of corrosion protection have been changed from roman to arabic numerals.
(f) Ties are to be labelled or colour coded to indicate their corrosion protection level.
(g) The terms “conventional and non-conventional connectors” are no longer used in this Standard. The term “conventional connector” has been replaced by “prescriptive connector”.
This Standard should be read in conjunction with CSA S304.1, Design of masonry structures, and CSA A371, Masonry construction for buildings.
This Standard was prepared by the Technical Committee on Masonry Connectors, under the jurisdiction of the Strategic Steering Committee on Masonry, and has been formally approved by the Technical Committee. It will be submitted to the Standards Council of Canada for approval as a National Standard of Canada.
Scope
Notes:
(1) For requirements pertaining to loads acting on connectors, see CSA S304.1.
(2) For requirements pertaining to installation of masonry connectors, see CSA A371.
1.1
This Standard specifies minimum requirements for designing the following masonry connectors:
(a) ties used to
(i) interconnect the wythes of a masonry wall; or
(ii) attach masonry veneer to its structural backing;
(b) anchors used to
(i) connect masonry walls to intersecting walls or to other structural members;
(ii) attach stone to its structural backing; or
(iii) interconnect stone;
(c) fasteners used to secure masonry ties and anchors to structural elements; and
(d) repair connectors used to restore or improve masonry construction.
1.2
This Standard does not apply to
(a) connectors for
(i) precast concrete; and
(ii) prefabricated masonry panels; and
(b) fasteners used to attach equipment or fixtures to buildings.
1.3
This Standard recognizes two types of masonry connectors:
(a) connectors, including repair connectors, designed in accordance with the performance requirements of this Standard; and
(b) prescriptive connectors, which offer a simple prescriptive solution (or deemed-to-comply solution) to the performance requirements of this Standard.
1.4
In CSA Standards, 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. Legends to equations and figures are considered requirements.
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