In masonry construction, which parts require angle iron?

• A. All openings and voids
• B. Door headers only
• C. Around windows and doors
• D. Along top of masonry

Answer: (A)

In masonry work, any place the wall is pierced—doors, windows, vents, or other openings—creates a weak point where the wall must carry and transfer load differently. Angle iron acts as a lintel and reinforcement, spanning the opening and carrying the weight from above down to the masonry on the sides. Since every opening or void can become a point of cracking or sagging if not supported, the safest and most effective approach is to reinforce all openings and voids with angle iron. Install it across the top of each opening with proper bearing on the surrounding masonry and secure it as required, so the load is carried through the steel into the wall on each side.