Interviewer instructions
<span class="em">4.A.4 Number of floors underground</span></p>
<p>A floor is considered underground if it is found under the height that determines the sidewalk or the terrain.</p>
<p>These variables form part of the basic characteristics of the building.</p>
<p>Categories of this variable:</p>
<div class="i1">0<br />1<br />2<br />3 or more</div>