Table 2.
The lifetime of residential buildings with different building structures.
| Design Lifetime/Year | Actual Lifetime/Year | |
|---|---|---|
| BW | 40 | 30 |
| BC | 50 | 30 |
| SC | 70 | 40 |
| S | 80 | 50 |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.