The emphasis of a flat field beratuaran or can be seen in the following figure:

**1. Cross-section ampat terms.**

For a rectangular cross-section has a length and width h mm b mm, where the emphasis is the intersection point of the diagonal or e = ½ h mm for the vertical cross section and size e = ½ b mm for horizontal cross-section.

See the following figure.

Figure 4.4 Ttitk heavy rectangular cross-section

**2. Cross-section square**

Location of the center of gravity for the fields that form a square that has the size of a mm, the size e = ½ a (mm), see the following picture

Figure 4.5 The weight of a square cross-section

**3. Cross-section circle** **
** Location of the center of gravity for the field that has the shape of a circle with a diameter d mm is at its center point, ie e = ½ d (mm) or see the following picture.

Figure 4.6 The emphasis of circular cross section

**4. The triangular cross-section**

Location of the center of gravity for the fields that form a triangle which has the size of the base b (mm) and height h (mm), then the position of the emphasis is on the point Z and sizes: e = 2/3 h (mm), see the following picture

Figure 4.7 The emphasis for the triangular cross section

**5. Sectional trapezium**

Location of the center of gravity for the fields that form the trapezium which has the size of the pedestal a (mm), the upper side b (mm) and height h (mm), then the position of the emphasis is on the point Z see the picture and size: e is calculated by the following equation:

Figure 4.8 The emphasis for sectional trapezium