Using Projected Loads in RISA-3D
August 18, 2011

Using Projected Loads in RISA-3D

RISA-3D, RISA-2D and RISAFloor have the capability to project distributed and area loads onto members. Consider the case of snow load on two buildings: one with a flat roof and one with a sloped roof. Ignoring the concept of shedding, if both buildings have the same footprint then they should both...

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How to Assign Column Base Boundary Conditions in RISAFloor
August 2, 2011

How to Assign Column Base Boundary Conditions in RISAFloor

Column boundary conditions are set in RISAFloor per the Splice Type that you have set in the Columns spreadsheet. For any column at the lowest floor level, the Splice checkbox will automatically be checked, indicating that a boundary condition will be set at the base. You may set the boundary...

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How to export a model to DXF
July 19, 2011

How to export a model to DXF

RISAFloor, RISA-3D, and RISAFoundation all allow the user to export a model as a DXF file for use in most major CAD programs.

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How to Model Trusses in RISAFloor
June 3, 2011

How to Model Trusses in RISAFloor

In RISAFloor on the roof level, you layout only the top chords of the truss and create your slope. These top chords by themselves probably won’t be sufficient enough to get designed in RISAFloor, but, don’t worry, we’ll take care of that in RISA-3D when we model the rest of truss.

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What are the Unbalanced Forces on Beams?
April 6, 2011

What are the Unbalanced Forces on Beams?

V-Brace frames in RISA-3D seismic design have unbalanced forces shown on both the beams and braces. As brace frames displace under lateral loads, one brace will buckle and its force decreases while the other brace in tension will have an increase of force until it reaches yield.

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