Preface
This is the second edition of CSA Standard A370, Connectors for Masonry. It supersedes the first edition, published in 1984.
The following are among the significant changes in this edition:
(a) improved clauses on corrosion in which three levels of corrosion protection are matched with nine classes of exposure;
(b) the mandatory use of stainless steel or equivalent materials for certain connectors in buildings over eleven metres high which are located in areas where the annual driving rain index is either moderate or severe;
(c) standard connectors are now referred to as conventional connectors. Performance criteria are given for nonconventional connectors as well as for conventional connectors;
(d) a section on repair connectors {sometimes called retrofit or remedial connectors) is included;
(e) this is a limit states edition, but working stress values are also given to facilitate use by those not yet familiar with Limit States Design (LSD); however, this will be the last edition to contain Working Stress Design (WSD).
This Standard represents a comprehensive treatment of the subject of connectors in accordance with existing knowledge, and it should be read in conjunction with CSA Standards CAN3-S304, Masonry Design for Buildings, S304.1, Masonry Design for Buildings (Limit States Design), and A371, Masonry Construction for Buildings. This Standard is written in SI (metric).
This Standard was prepared by the Technical Committee on Masonry Connectors under the jurisdiction of the Standards Steering Committee on Masonry and has been formally approved by these Committees.
Scope
1.1 Connectors Included
This Standard applies to the following types of masonry connectors:
(a) ties used to interconnect the wythes of a wall;
(b) ties used to attach masonry veneer to its structural backing;
(c) anchors used to connect masonry walls to intersecting walls or to other structural members;
(d) anchors used to attach stone to its structural backing or to interconnect stone;
(e) fasteners used to secure masonry ties and anchors to structural elements; and
(f) repair connectors used in the restoration or improvement of existing masonry wall systems.
1.2 Connectors Excluded
This Standard does not apply to
(a) connectors for precast concrete;
(b) connectors for prefabricated masonry panels; or
(c) fasteners used to attach equipment or fixtures to buildings.
1.3 Loads
Loads acting on connectors shall be determined in accordance with CSA Standard CAN3-S304 or S304.1.
1.4 Construction
Installation of masonry connectors shall be in accordance with CSA Standard A371.
1.5 Types of Connectors
This Standard recognizes three types of masonry connectors, as follows:
(a) conventional connectors;
(b) nonconventional connectors; and
(c) repair connectors.
Conventional connectors shall comply with the requirements of Clause 9 and all other Clauses of this Standard, except Clauses 10 and 11. Nonconventional connectors shall comply with the requirements of Clause 10 and all other clauses of this Standard, except Clauses 9 and 11. Repair connectors shall comply with the requirements of Clause 11 and all other clauses of this Standard, except Clauses 9 and 10.
