2.By plotting the maximum angular distortion (d/L, see Fig. 7.1) versus the maximum differential
settlement Δsuch as shown in Fig. 7.24, a correlation was obtained that is defined as Δ=350 d/L
(note: Δis in inches). Using this relationship and a maximum angular distortion d/Lof 1/300,
cracking of brick panels in frame buildings or load-bearing brick walls is likely to occur if the
maximum differential settlement Δexceeds 1
1
/
4
in. (32 mm).