Which component runs in between studs for support or fire blocking?

• A. Cripple
• B. Header
• C. Blocking
• D. Jack Stud

Answer: (C)

Blocking is the piece that runs between studs to provide a solid backing and to act as fire blocking in concealed wall spaces. It’s installed horizontally between studs at required intervals or where a nailing surface is needed, giving stability to the wall, helping drywall attach securely, and slowing the spread of fire through the cavity.

The other items serve different roles: a header spans and carries load above openings like doors or windows; jack studs are the vertical studs that support that header; cripple studs are the short vertical members above or below openings. Blocking, by contrast, fills the space between studs for general support and fire safety throughout the wall.