Bricks and Building Forms
All openings in brick walls need some way of keeping up the bricks above the openings. This may be an arch, or a flat lintel of some kind. Above are different forms of flat lintels.
Fig. A. A brick wall with and without a lintel.
Fig. B. The setting out of a brick arch with wedge-shaped bricks.
Fig. C. The setting out of a rough brick arch. These are normal bricks and the wedges are formed with mortar.
Fig. D. A ferro-concrete lintel is the modern solution to the problem. Some builders use steel lintels and wooden ones used to be common, but these were often attacked by dry rot were.