parapet wind loading

Parapet Wind Loading

RISAFloor v11 allows users to add parapets while allowing the program to calculate the wind loads per the ASCE 7 parapet wind loading requirements.

How to add a parapet to your model?

The Floors spreadsheet has a parapet height per floor which is the default for the entire floor level. You can then go into the Columns and Wall Panels spreadsheets to customize the height of your parapets around the edges of your roof.

For columns, the program will go around the edge of your roof and find the column parapet height at each location. The smaller of the two values between the two columns is the parapet height.

Parapet Wind4

Once this is complete you can solve your model and use the Director to go to RISA-3D, where you view the Wind Load Generation dialog.

Parapet Wind1 300x81 2x Parapet Wind2 300x142 2x Parapet Wind3 300x68 2x

From here you can see the defined geometry and the wind load at each parapet. This load is then lumped in with the regular roof wind load to give a total wind force in each direction.