Table 2.

Physical environment sub-system (PES).

Name	Life expectancy	Fundamental characteristics	Typology subdivision	PES Code	Example physical environment components
Primary	50–100 years	Durability	Structural	I s	Structural elements (structural frame, exterior and interior bearing walls, slabs, etc.)
			Architectural	I a	Building envelope (exterior nonbearing walls, glass facades, ventilated facades etc), heavy infill walls, etc.
Secondary	15–50 years	Inspectionability, accessibility, repairability	Architectural	II a	External coatings, light internal partitions, finish floors, false ceilings, doors and windows, ornaments, etc.
			Systems and technical installations	II i	HVAC duct, pipe, reserve water tank, waste pipe, energy generators, terminal unit, elevators, elevators machinery, electricity cable, electricity distribution panel, fire pump, etc.
Tertiary	5–15 years	Replaceability of the single component	–	III	Basic equipment, furniture, etc.