Literal question
<span class="em">Questions 25-29 are to be answered only if at least one conventional dwelling in the building</span></p>
<p>28 Construction materials of the building's outer walls</p>
<div class="i1">[] 1 Reinforce concrete<br />[] 2 Prefabricated units<br /><br />Masonry of brick, stone or substitute (gas-formed concrete), with floors of<br /><br />[] 3 Reinforced concrete (iron beams)<br />[] 4 Wood<br />[] 5 Wood (beams, boards etc.)<br />[] 6 Framework, adobe<br />[] 7 Other materials (fiberboard, OSB, glass, etc.)<br />[] 8 Mixed Materials</div>