International Building Code Section 1710

International Building Code 1710.1

Conformance to standards. The design strengths and
permissible stresses of any structural material that are identified
by a manufacturer’s designation as to manufacture and
grade by mill tests, or the strength and stress grade is otherwise
confirmed to the satisfaction of the building official, shall conform
to the specifications and methods of design of accepted
engineering practice or the approved rules in the absence of
applicable standards.

International Building Code 1710.2

New materials. For materials that are not specifically
provided for in this code, the design strengths and permissible
stresses shall be established by tests as provided for in Section