Building descriptors are grouped under objects or building components. A wall or exterior surface (an object) would have multiple building descriptors dealing with its geometry, thermal performance, etc. Each building descriptor contains the following information.
Building descriptors are grouped under objects or building components. A wall or exterior surface (an object) would have multiple building descriptors dealing with its geometry, thermal performance, etc. Each building descriptor contains the following information.
New buildings, additions, and alterations meeting 90.1 2022 G3.1.4a follow the modeling requirements in Standard 90.1-2022 Section G3.2. All other alterations follow the modeling requirements in Standard 90.1-2022 Section G3.3. For each descriptor where the modeling requirements differ across G3.2 and G3.3 separate headings are presented for G3.2 and G3.3 with a description of the requirements associated with each under the applicable heading. No separate headings were included for G3.2 and G3.3 where the requirements are the same.
Example of the format for distinguishing between 90.1 G3.2 and G3.3 requirements.
G3.2 New Construction/Major Alterations
Requirements for 90.1 G3.2 specifically will be included under this heading.
G3.3 Minor Alterations
Requirements for 90.1 G3.3 specifically will be included under this heading.