# Monopitch Roofs - Wind Pressure Coefficients

Pressure coefficients of monopitch roofs are calculated automatically.

**Notation**

**b _{ }**

**=**Width of the structure

**e**_{ }**=**Edge distance

**c**_{pe,10 }**=**External pressure coefficient

**h**_{ }**=**Height of the structure

**q**_{b }**=**Basic velocity pressure

**q**_{p}(z_{e})_{ }**=**Peak velocity pressure

**z**_{e }**=**Reference height

**w**_{e}**=**Wind pressure acting on the external surfaces

*Wind direction angle*

**θ =**The wind pressure acting on the external surfaces, *w _{e}* is obtained from equation below.

The roof, including its protruding parts, should be divided in zones. Pressure coefficients *c _{pe}* should be defined for each zone. Zones are given in EN 1991-1-4

**Figure 7.7.**Pressure coefficient values are given in EN 1991-1-4

**Table 7.3a**and

**Table 7.3b**.

Pressure coefficient values are given in EN 1991-1-4 **Table 7.3a** and **Table 7.3b**.

In the ideCAD software, the regions to which the pressure coefficients of monopintch roofs will be applied are calculated automatically.

**Related Topics**