Design Criteria

The deflection limits that are used for member design.

Deflection Settings

Deflection Limit

How much a structural element bends under a load.

Span (Deflection Settings as a Ratio)

This is the deflection limit and is a predefined number. If users would like to enter a custom number they are also able to do so.

L/value, where: L= member length (in) value= min. 360 for floor beams/joists live load deflection; 240 for floor beams/joists total load deflection; 240 for roof beams/rafters live load deflection; 360 for roof beams with gypsum ceiling for live load deflection; 180 for roof beams/rafters total load deflection

Span Max. (Deflection Setting as an Absolute Dimension)

Allows users to enter deflection in inches (example: maximum deflection= 0.5")

Cantilever

It will perform the deflection check on the cantilever portion (in above picture that is the 180 area).

If a user checks 2L/ it will double the cantilever to 360 instead of the 180. Which then makes the cantilever more stiff.

LL (Live Load)

Reflects a moving variable or weight added to dead load

TL (Total Load)

The complete measurement of live and dead load together

Load Duration Override

The user can override the load durations factors that are automatically implemented in the application

Lateral Bracing

Bracing to prevent the lateral displacement of the member

All bending members are deigned in accordance with the lateral stability calculations (as per NDS/CSA-USA/Canada design standards)

Automatic vs. Manual Bracing

The user can enter a specific distance/length/o.c. spacing where the lateral braced will be installed

Manual Bracing Settings

Allows the user to manually select bracing for a member

Importance Category

For the purpose of determining the specified snow and wind loads. Importance factors will be applied in accordance with ICC/IRC or NBCC building codes from USA and Canada, respectively

Temperature

When structural members will experience sustained exposure to elevated temperatures, design values will be multiplied by the temperature factors