Page 20 - GRIHA Manual Volume III - Introduction to National Rating System
P. 20
Building and system design optimization 13
Figure 10 Vertical shadow angle and horizontal shading device
Note: Refer Annexure 4 for methods of HSA and VSA calculation
Shading design with the help of HSA and VSA
Once the requisite horizontal or vertical window angles are calculated, it is easy to determine the
size of the shading device. In figure 11 below, the required horizontal window angle H is shown. AB
is the resulting vertical louver normal to the wall. AB can also be replaced by an inclined louver AC
without any effect on the masking angle of AB. The size of the inclined louver AC is less than that of
the normal louver AB.
A similar strategy can be adopted in designing horizontal shading devices.
Figure 10 Vertical shadow angle and horizontal shading device
Note: Refer Annexure 4 for methods of HSA and VSA calculation
Shading design with the help of HSA and VSA
Once the requisite horizontal or vertical window angles are calculated, it is easy to determine the
size of the shading device. In figure 11 below, the required horizontal window angle H is shown. AB
is the resulting vertical louver normal to the wall. AB can also be replaced by an inclined louver AC
without any effect on the masking angle of AB. The size of the inclined louver AC is less than that of
the normal louver AB.
A similar strategy can be adopted in designing horizontal shading devices.
