Snow and wind generator

In addition to separate wind and snow generators, SCIA Engineer offers also a complex tool for the generation of wind and snow load on frame structures.

This complex generator does several tasks at once:

• it creates a new load case for wind from the left hand side with overpressure and generates the appropriate load for it,

• it creates a new load case for wind from the left hand side with under-pressure and generates the appropriate load for it,

• it creates a new load case for wind from the right hand side with overpressure and generates the appropriate load for it,

• it creates a new load case for wind from the right hand side with under-pressure and generates the appropriate load for it,

• it creates a new load case for snow generates the snow load.

Procedure to use Snow and Wind generator

• Open service Load

• Start function Wind snow generator.

• Define the input parameters (see below).

• Confirm with [OK].

• The load-generator wizard is opened on the screen.

• If necessary, you may alter some of the parameters (for more see chapters dealing with standalone wind and snow generators).

• Use button [Next] to go through all the screens of the wizard.

• At the end the specified load cases are created and corresponding load generated in them.

Wind snow generator parameters

Frame distance

Defines the distance between adjacent frames. Similarly to standalone wind or snow generator, you select one planar frame that will be subject to the generated load. Therefore, you must specify the distance to the neighbouring frames in order to define the loading width.

Wind

Load group	The generated load cases for wind load will be inserted to the given group.
Load case name	You may input the base of the load case name. E.g. if you specify the base of the name "WND", the names of the generated load cases will be: WND – LO, WND – LU, WND – RO, WND – RU. Also corresponding descriptions of load cases are automatically generated: Wind from left – overpressure, Wind from left – underpressure, Wind from right – overpressure, Wind from right – underpressure.
Overpressure	If ON, the overpressure load case will be generated.
Underpressure	If ON, the underpressure load case will be generated.

Snow

Load group	The generated load case for snow load will be inserted to the given group.
Load case name	You may input the name of the load case. Also a corresponding description of the load case is automatically generated.

International standards

For some national standards the parameters of the generator may be extended. E.g. for the French code, two more wind load cases (front wind – overpressure and front wind-underpressure) and one more snow load case (accidental) are generated in compliance with the provisions of the national standard. Also snow accumulation is taken into account for the French standard.