Preface
This is the fourth edition of CSA S347, Method of test for evaluation of truss plates used in lumber joints. It supersedes previous editions published in 1980, 1976, and 1999.
The major changes in this addition include the following:
a) change from basic relative density to oven-dry relative density
b) introduction of test requirements for machine stress rated lumber, machine evaluated lumber and structural composite lumber
c) introduction of additional tests for roller press embedment of truss plates
d) updating of calculations and reporting to suit changes in truss plate analysis requirements in CSA O86
The plate and teeth resistance and the teeth lateral slip resistance, determined in accordance with this Standard, provide the basis for the truss plate connection design and design values set forth in CSA O86, Engineering design in wood.
Scope
1.1
This Standard provides basic procedures based on joint ultimate load or a limiting slip for the determination of the lateral strength resistance and lateral slip resistance of truss plate teeth embedded in sawn and structural composite lumber members.
1.2
This Standard provides for the determination of the lateral strength resistance and lateral slip resistance of nails embedded in lumber members when used in nail-on truss plates. When this Standard is so applied, the word tooth is understood to be replaced by the word nail.
1.3
This Standard provides basic procedures based on truss plate ultimate strength for the determination of the tensile and shear strengths of the net section of the plates.
1.4
The capacities determined by testing methods and procedures described herein, and corrected for the variations in the ultimate tensile strength of the plate material used in the manufacture of the test truss plates, will yield values that may be adjusted for use in engineering design, such as specified in CSA O86.
1.5
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.
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