【Daily Question】Utilities – Civil Engineering – 20190512

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The incorrect practice in insulation and thermal retention work is: a) The installation thickness does not include the adhesive materials, and it should be calculated based on the net thickness. 　　b. When rice husks along with insecticides are used for thermal insulation, this should be specified in the relevant item column of the list. c. For column insulation, the calculation is done by multiplying the length measured from the center line of the insulation layer by its height and thickness (excluding the thickness of the bonding layer). d. The volume occupied by holes through which pipes pass through the wall is not deducted when calculating the thermal insulation of walls. 　　 Answer: d Analysis: 1. For indoor insulation and that of greenhouses, the thickness to be considered is the net thickness, without including any bonding materials. The unit of measurement is cubic meters. 2. Wall insulation: The thickness to be considered for installation does not include the adhesive materials, and the volume occupied by refrigeration door openings and holes through which pipes pass must be deducted. The unit of measurement is cubic meters. 3. The thermal insulation for columns is calculated by multiplying the length along the centerline of the insulation layer by its height and thickness (excluding the thickness of the bonding layer). The unit of measurement is cubic meters. 4. The insulation layer for floor surfaces does not include the bonding materials, and is calculated based on its net thickness. The volume occupied by columns and piers is not deducted. The unit of measurement is cubic meters. Acid-resistant and anti-corrosion integral surface coatings, as well as acid-resistant and anti-corrosion block surface coatings applied to horizontal or vertical surfaces, should be described in the item list; when rice husks combined with insecticides are used for insulation, this should also be specified in the item list.