Substitutions, omissions and additions to fire resistive design descriptions.
The components or materials allowed in a tested fire resistive design are limited to those elements specifically identified in the description of the tested design. Substituting, omitting, or adding elements to those described for a tested design is prohibited unless specifically approved by the testing agency.
Where the word “proprietary” appears in design descriptions, either the design or one or more of its components are considered proprietary. Each proprietary system shall be built utilizing the components specified by the company or companies listed under the detailed description for that system.