鉄骨

1. Origins, structure, and basic meaning

• Structure: 鉄骨, read てっこつ, means a building's steel framework or a steel member of that framework.
• Basic usage: It appears when describing a building's structure or moving structural steel at a construction site.

2. Common pitfalls and similar expressions

• Framework and individual member
  • 骨組みに太い鉄骨が使われている describes thick steel members being used in the building's framework.
  • 鉄骨をクレーンで持ち上げた refers to an individual steel member that was lifted.
• Reading and meaning
  • てっこつ contains a small っ.
  • Here, 骨 means the framework supporting a building, not a bodily bone.