Which term describes the horizontal member placed between roof trusses to support the roof?

• A. Ridge
• B. Purlin
• C. Stud
• D. Rafter

Answer: (B)

In roof framing, a horizontal support member that runs between roof trusses to carry the roof deck is called a purlin. This piece sits across the trusses and provides a surface for the roof covering, helping to transfer the load from the roofing material down to the trusses. It’s distinct from a ridge, which is the peak line where roof slopes meet; from a rafter, which is a sloped beam from the ridge to the wall; and from a stud, which is a vertical wall framing member. So the horizontal between-trusses role described aligns with a purlin.