Airfoil, One Shear Web
 @SHAPE_BUILDER_ANALYSIS {
 @SHAPE_BUILDER_NAME {Bcs1Name} {
 @SHAPE_GROUP {AIRFOIL}
 @SHAPE_TYPE {ONE_SHEAR_WEB}
 @DIMENSIONS {
 @DIMENSION_01 {c}
 @DIMENSION_02 {t_{F}}
 @DIMENSION_03 {t_{R}}
 @DIMENSION_04 {η_{T}}
 @DIMENSION_05 {η_{B}}
 }
 @MATERIALS {
 @MATERIAL_01 {Mat_{1}}
 @MATERIAL_02 {Mat_{2}}
 }
 @AIRFOIL_SHAPE_NAME {AirfName}
 @NUMBER_OF_CONTROL_POINTS {N_{cp}}
 @IS_DEFINED_IN_FRAME {FrameName}
 @MESH_DENSITY {m_{d}}
 @COMMENTS {CommentText}
 }
 }
Notes

ShapeBuilder can generate beam crosssections in the shape of an airfoil with one shear web. To define an airfoil section with one shear web, use the following parameters.
 @SHAPE_GROUP: AIRFOIL, and
 @SHAPE_TYPE: ONE_SHEAR_WEB.

The base section is a closed section in the shape of an airfoil with one shear web, as illustrated in fig. 1. No options are available for this shape.

The definition of the geometry of the crosssection relies on the concept of NURBS curves. N_{cp} control points will be used for the definition of these NURBS curves. (Default: N_{cp} = 2,048)

Sectional shapes are defined in their own local coordinate system, which is assumed to coincide with the global coordinate system. If a fixed frame, FrameName, is specified, the local coordinate system coincides with this fixed frame.

The mesh density parameter, m_{d}, determines the level of mesh refinement. (Default: m_{d} = 4)

It is possible to attach comments to the definition of the object; these comments have no effect on its definition.
The airfoil with one shear web: base configuration

Fig.1 illustrates the base configuration of the airfoil with one shear web.

The geometric configuration of the airfoil section if defined by the dimensions listed in table 1, which are also indicated in fig. 1. Dimensions labeled in red are required. Dimensions labeled in blue are optional and are assigned the default value indicated in table 1.
Component 
Dimension 
Symbol 
Default 
Nb. 
Airfoil 
chord length 
c 
required 
01 
Airfoil 
thickness 
t_{F} 
required 
02 
Airfoil 
thickness 
t_{R} 
required 
03 
Airfoil 
location 
η_{T} 
required 
04 
Airfoil 
location 
η_{B} 
required 
05 
Table 1. Dimensions defining the geometry of the airfoil section.

Zone 1 of the airfoil section is defined as follows.

Zone 2 of the airfoil section is defined as follows.

It comprises the following faces: RightWeb, TopBack, TopTab, BotBack, and BotTab.

It is associated with material Mat_{2} , which can refer to material properties or solid properties.
Figure 1. The airfoil section
Figure 2. The airfoil section, shear web detail
Figure 3. The airfoil section, back portion detail