Engineering design in wood

1.1 General

This Standard provides criteria in accordance with the National Building Code of Canada, for the structural design and evaluation of structures or structural elements made from wood or wood products, including:

a) graded lumber;

b) glued-laminated timber;

c) cross-laminated timber (CLT);

d) mechanically laminated timber (MLT);

e) unsanded plywood;

f) oriented strand board (OSB);

g) composite building components;

h) shearwalls and diaphragms;

i) timber-concrete-composite (TCC);

j) timber piling;

k) pole-type construction;

l) prefabricated wood I-joists;

m) structural composite lumber;

n) permanent wood foundations;

o) plank decking;

p) nail-laminated decking; and

q) structural connections.

1.2 Exclusions

This Standard does not include design of timber bridges.

1.3 Design method

This Standard employs the limit states design method.

1.4 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; 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.

1.5 Units of measurement

If a value for measurement as given in this Standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification.