Literal question
<span class="em">Part 3. Information on housing</span></p>
<p>55. What is the main construction material of the pier (or the pivot or the load-bearing wall) of this dwelling/flat?</p>
<div class="i1">[] 1 Durable material (concrete, brick or stone, steel or iron or durable wood)<br />[] 2 Undurable materials (wood of low quality or bamboo, soil, other)</div>
Interviewer instructions
<span class="h2">Part V: Instructions on how to question and record information on the census form</span></p>
<p><span class="h3">Part 3: Information about housing</span>
<br />The DTV collects information about the housing situation of the household. Do not collect housing information for specific demographics.</p>
<p><span class="em">Question 55: What is the main material for columns (or pillars, or load-bearing walls) of this house/apartment?</span>
<br />A column (or pillar, or load-bearing wall) is a structural element built to support a roof (or ceiling, or beam).</p>
<p><span class="pg">[p.77]</span></p>
<p>The determination of the quality of timber used to make columns (or pillars, or load-bearing walls) is based on Vietnam's current classification of timber groups, in which durable timbers are those belonging to groups I, II, III, IV, V; low quality, fragile timber are those belonging to groups VI, VII and VIII or young trees, with a diameter of less than 10 cm. Details of timber species are presented in the "Nationwide unified provisional classification of timber types table" in Appendix 13.</p>
<p>Some column materials are specified as durable materials, including: reinforced concrete, brick/stone, and durable iron/steel/wood.</p>
<p>Some materials for making columns are specified as temporary materials, including: low-quality wood/bamboo, earth, ...</p>
<p>In case the household regularly lives in 2 or more houses on the same lot, the main material for making columns is taken from the main house.
