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Load Generator and Distributor

The Load Generator and Distributor tool uses the dimensions and load specification for a building to calculate the lateral wind and seismic forces according to ASCE 7 “Minimum Design Loads for Buildings and Other Structures.” Now included in the Load Generator is the IBC 2012 and ASCE 7-10 design codes for development of lateral forces and snow loads. The lateral forces are distributed between floor levels and the shear walls at that floor level. The method of distribution considers either rigid or flexible floor diaphragms, while considering torsional effects when rigid diaphragms are selected. Output can be exported directly into the X-Brace Shear Wall design module or into an Excel spreadsheet.

The load generator input is split into 5 input tabs including: Building Data, Wind Data, Seismic Data, Snow Data, and Shear Walls Data. The Building Data tab includes the Loading Code, building location and geometry.

ASCE7LoadGeneratorBuildingInput

Under the Wind Data tab users input the basic wind design parameters and effective areas for component & cladding and main wind force resisting system design.

ASCE7LoadGeneratorWindInput

Within the Seismic data tab the basic system for the lateral force resistance is selected. Building limits and design coefficients are automatically loaded according to ASCE 7. The user inputs the spectral response accelerations and appropriate loads for calculation of the effective seismic weight of the building.

ASCE7LoadGeneratorSeismicInput

Within the Snow Data tab users can input the Ground Snow Load, Roof Surface Type, Terrain Category, and Thermal Condition to calculate the design snow load for a structure.

ASCE7LoadGeneratorSnowInput

Shear wall locations and geometry can be input in the Shear Walls Data tab. The active floor layout can be viewed and selections for rigid or flexible floor diaphragms can be made. Shear walls can also be viewed in a 3D model layout. The load generator includes a new wind and seismic input lookup feature. This feature uses the building zip code and automatically loads the wind and seismic design parameters according to ASCE 7.

ASCE7LoadGenerator

 

ASCE7LoadGeneratorImage

Load generator results are given in 4 output tabs: Wind Output, Seismic Output, Snow Output, and Shear Walls Output. Wind Output includes the Component & Cladding and Main Wind Force Resisting System wall and roof design pressures. The lateral wind load at each floor level is also given in the X and Y direction.

ASCE7LoadGeneratorWindOutput

The Seismic Output tab displays the Seismic Design Category (SDC), total building weight, cumulative base shear, and lateral force at each floor.

ASCE7LoadGeneratorSeismicOutput

Within the Snow Output tab, the user is returned the Roof Snow Load, Thermal Factor, and the Roof Slope Factor.

ASCE7LoadGeneratorSnowOutput

Under the Shear Walls Output tab the user can view the distributed lateral wind and seismic forces for individual shear walls within the layout. Shear walls can also be viewed in a 3D model layout.

ASCE7LoadGeneratorShearWallOutput

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