Nesting Load Combinations
March 27, 2013

Nesting Load Combinations

The Load Combinations spreadsheet in RISA-3D is limited to ten columns of BLC and Factor combinations. However, there are times where you may need to include additional entries to your Load Combination. To do this, you can simply “nest” your load combinations.

Read More
How to Model Multiple Pedestals/Loads on One Footing
August 31, 2012

How to Model Multiple Pedestals/Loads on One Footing

RISAFoundation includes a footing element which is represented by a single node. A frequent question that arises is how to apply multiple point loads to a single footing, but at different locations. This can be done with or without corresponding pedestals, but for the example below multiple...

Read More
How to Apply Hydrostatic Loads to Circular Tanks in RISA-3D
June 7, 2012

How to Apply Hydrostatic Loads to Circular Tanks in RISA-3D

RISA-3D v10 now has the ability to quickly and easily apply hydrostatic loads to circular tanks using the Cylinder Generator. This generator can be found by clicking the Templates button and choosing the Cylinder - Plates/Members option.

Read More
How to Check Floor Vibrations Using RISAFloor
October 13, 2011

How to Check Floor Vibrations Using RISAFloor

One of the most overlooked design criteria for commercial buildings is the tendency of the floor system to bounce or vibrate due to human footfalls. Excessive vibration of the floor system is a serviceability issue, and can lead to annoyance or concern from the building’s occupants.

Read More
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...

Read More
How to Apply Notional Loads in RISA-3D
May 23, 2011

How to Apply Notional Loads in RISA-3D

In RISA-3D you can automatically apply notional loads to your structure to comply with your steel code (such as AISC 360). Notional loads take into account a building’s actual out-of-plumbness by adding de-stabilizing lateral loads. The AISC 360 recommends either 0.2% or 0.3% of the vertical loads...

Read More