Washington Administrative Code › Title 51 - Enterprise Services, Department of (Building Code Council) › Chapter 51-11C - State Building Code adoption and amendment of the 2021 edition of the International Energy Conservation Code, Commercial › Section 51-11C-50500 - Section C505-Change of space conditioning, occupancy or use

Current through Register Vol. 24-14, July 15, 2024
C505.1
General.
Buildings or spaces undergoing a change in space
			 conditioning alteration shall comply with Sections C505.2 and C505.4. Buildings
			 or spaces undergoing a change in occupancy alterations shall comply with
			 Sections C505.3 and C505.4. Spaces changing from one use type to another shall
			 comply with Section C505.5.
Buildings or spaces undergoing a change in space conditioning,
				change in occupancy or use shall conform to the provisions of this code without
				requiring the unaltered portion of the existing building to comply with this
				code. Alterations shall be such that the existing building or structure is no
				less conforming to the provisions of this code than the existing building or
				structure was prior to the alteration.
A change in space conditioning alteration shall be deemed to
				comply with this code if the alteration area alone complies or if the
				alteration area is combined with all other spaces within the existing building
				that are of the same space conditioning category according to Section C505.2 to
				demonstrate compliance. A change in occupancy alteration shall be deemed to
				comply with this code if the alteration area alone complies or if the existing
				building and the alteration area are combined to demonstrate complete for the
				whole building. This allowance applies to prescriptive compliance in accordance
				with Section C505.4 or total building performance in accordance with Section
				C407.
Buildings or spaces that were permitted prior to the 2009
				Washington state energy code, or were originally permitted as unconditioned,
				may comply with this section as follows:
1. Where the component performance
			 alternative in Section C402.1.5 is used to demonstrate compliance with this
			 section, the Proposed Total UA is allowed to be up to 110 percent of the
			 Allowable Total UA. This exception may be applied to the project area alone, or
			 to the existing building and project area combined as a whole
			 building.
2. Where total building
			 performance in accordance with Section C407 is used to demonstrate compliance
			 with this section, the total annual carbon emissions from energy consumption of
			 the proposed design is allowed to be up to 110 percent of the annual carbon
			 emissions from energy consumption allowed by Section C407.3. This exception may
			 be applied to the project area alone, or to the existing building and project
			 area combined as a whole building.
C505.1.1
Additional energy efficiency
			 credits.
Buildings or spaces that are required to comply with Sections
			 C505.2 or C505.3 shall also comply with Section C502.1.1 in the same manner as
			 an addition.
C505.1.2
Renewable energy.
Buildings or spaces that are required to comply
			 with Section C505.2 or C505.3 shall also comply with Section C502.1.2 in the
			 same manner as an addition.