Sunshades are made 75 mm at the cantilever end and tapered upwards to the depth of the lintel. They come monolithic with lintel. On an average the projection will be 60–90 cm. The main rods of the cantilever of the sunshade can be 8 mm rods at 10 cm centres with 8 mm distributors at 15 cm centres. At least a 20 mm cover is provided. A typical cross-section of a sunshade (Chajja) is shown in Fig. 9.5.
Figure 9.4 Doubly curved precast shell unit used as a roof
Figure 9.5 Sunshade precast concrete unit
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