Environmental Engineering Reference
In-Depth Information
Figure 1.2
Mobile or manufactured home.
mately 10 million housing units. These are often described as trailers, mobile
homes, double-wides, modulars, and, increasingly, prebuilts. Most are
described as mobile homes because they are transported on a frame and
wheels which are part of the structure. The construction of manufactured
houses differs significantly from that of site-built houses because the former
are designed to provide lower cost, more affordable housing. They often
employ lower cost materials and have, in the past, been less well-con-
structed than site-built houses. They are more vulnerable to wind and
weather-related damage and are usually less well-insulated. Prebuilts are
erected on substructures and differ from site-built homes primarily in their
simplicity of design.
Multifamily dwellings (
Figure 1.3
)
vary from single-story to multistory
structures. In most instances, ownership is second-party. Multifamily dwell-
ings are always site-built, with building materials that reflect cost and engi-
neering considerations.
Figure 1.3
Multiple-family dwelling.
