| duct space | ช่องท่อ |
| dummy joint | รอยต่อหลอก เพื่อให้เกิดรอยร้าวที่รอยนั้น |
| dumpling | หย่อมดิน |
| durability | ความคงทน, ความทนทาน |
| dynamic load | น้ำหนักบรรทุกจลน์ |
| Deflection: | (english) This word usually carries the same meaning as displacement, although it is sometimes used in place of deformation. |
| Deformation: | (english) A change in the shape of an object or material. |
| Degree of Freedom: | (english) A displacement quantity which defines the shape and location of an object. In the two dimensional plane, a rigid object has three degrees of freedom: two translations and one rotation. In three dimensional space, a rigid object has six degrees of freedom (three translations and three rotations). |
| Displacement: | (english) A change in position. A displacement may be a translation a rotation or a combination of those. |
| Distributed load: | (english) An external force which acts over a region of length, surface, or area: essentially any external force which is not a concentrated force. |