تیر و شاه‌تیر
type: Concept
preferred label: beam and girder @en
related: خرپا

خرپا
type: Concept
broader: سازه
preferred label: truss @en
related: تیر و شاه‌تیر

سازه
type: Concept
narrower: خرپا
preferred label: structure (built object) @en