Sheeting definition

Name

Name of the sheeting.

I moment

Moment of inertia (i.e. second moment of area) per length.

K1 +

Factor K1 for positive position.

K2 +

Factor K2 for positive position.

K1 -

Factor K1 for negative position.

K2 -

Factor K2 for negative position.

The K-factors (above) refer to the bending stiffness of the sheeting. This information needs to be obtained from the manufacturer, because they determine these values via testing. The picture below illustrates an example of a manufacturer's sheet with these values.

Geometry

bs

Dimension bs: see the Fig. below.

br

Dimension br: see the Fig. below.

bb

Dimension bb: see the Fig. below.

b0

Dimension b0: see the Fig. below.
hp Dimension hp: see the Fig. below.
Top dovetail height hd Dimension hd: see the Fig. below. Note: this dimension is used only in some checks related to composite beams.

Thickness

Thickness of the sheet.

Nominal thickness

This value is used ONLY for Composite beam design checks. It is not used in normal steel design checks.

"Nominal thickness" is the "gauge value" whereas "Thickness" is the "actual thickness" of the profile deck.

"Nominal thickness" is used for longitudinal shear check in calculating the contribution of profiled steel sheeting as per clause 6.6.6.4 and 9.7.4 of EN 1994-1-1.

The procedure for definition of a new sheeting

  1. Open the database manager for sheetings by using the library function Libraries > Steel > Sheeting library.

  2. Click button [New] to create a new sheeting.

  3. A new sheeting is added into the list of defined sheetings.

  4. Click button [Edit] to edit its properties.

  5. Input the parameters.

  6. Confirm with [OK].

  7. Close the database manager.

Note: A new sheeting is defined in the program tool called Database manager. The database manager can be used not only for the definition of a new sheeting, but also for editing of existing ones, for removal of no more necessary ones, and for other operations related to the management of sheeting database.

In addition, other settings must be made in order to apply the sheeting in a structure model.

Note: some additional properties are defined (material, orthotropic properties), which are related to the composite analysis model