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430   Advanced Design Examples of Seismic Retrofit of Structures










                                      (B)





                                                (Photo taken by Mohammad Yekrangnia)
                    adapted by Zamrashidi [35]
                    (E)

            FIG. 6.27, CONT’D (C) Adapted from H. Zamrashidi, “Architecture of Iran—Construction of
            Traditional Houses”, Zomorrod Publications, Tehran, Iran, 1995 (photo taken by Mohammad
            Yekrangnia). (D) From http://www.calearth.org (photo taken by Mohammad Yekrangnia).
            (E) Adapted by H. Zamrashidi, “Architecture of Iran—Construction of Traditional Houses”,
            Zomorrod Publications, Tehran, Iran, 1995 (photo taken by Mohammad Yekrangnia).)





                                         Thatch


                            32 cm
                                         Mud

                                          Stone
                                          Adobe



            FIG. 6.28 Placement of several layers insulation on a complex roof which makes it heavy.

            on top of these roofs which make them heavier by aging (Fig. 6.28). The height
            of the wall up to the pivot of arch is 2.0–2.8m. The typical span of dome arched
            roof is 4.0–5.0m, while for barrel vault roof it ranges between 2.8m and 3.6m.
            Also for the latter, the longitudinal span can be greater than 5.0m. The height of
            the arch usually ranges from 0.7m to 1.5m.
               Based on the study by Mousavi Eshkiki et al. [34], who surveyed eight seis-
            mic prone provinces in Iran, the average areas of doors, windows, and shelves
                              2
            are 1.9, 2.2, and 2.1m , respectively. There are two types of openings in Iranian
            adobe buildings: one type is wooden lintel and the other, which is more common
            for arched roof adobe buildings, is an arched shape without any lintel
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