m M M/ 1/1/

FIGURE 24.11 Ways of forming roof slope.

FIGURE 24.11 Ways of forming roof slope.

Sometimes cambering is suggested so as to ensure that the rainwater drains off the roof quickly to avoid ponding. This does not seem to be effective especially when cambering is limited. To solve the water run-off problem in those locations with heavy rains, it is best to form a roof slope by the following methods (Figure 24.11):

1. Establishing short posts of different heights on the joints of top-layer grids.

2. Varying the depth of grids.

3. Forming a slope for the whole grid.

4. Varying the height of supporting columns.

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