Users often encounter an issue where a Line Load cannot be applied to a beam or column, leading to an error message upon running the analysis:

Error: “Projected length of zero for element load”

Why Does This Error Occur?

This error usually occurs when:

• The Line Load is longer than the element it’s applied to. 
• If a node is generated over the punched area of a slab but remains unconnected to the structure, it may cause the error.
• Incorrect Application to Vertical Beams (Columns) → If a beam is used as a vertical column and the load direction is incorrect, an error will occur.

Solutions to Fix the Line Load Length Error

• Verify Load Application on Vertical Beams (Columns)
  • If applying a line load to a vertical beam, ensure the load direction is correctly defined.

Under the Properties Palette, change the direction from Y to X Or Z (as appropriate):

Note: In SUMO, line loads are typically projected in a horizontal or inclined direction. Applying them vertically may result in zero projection length, causing an error. Instead of a line load, consider using a point load at the correct height for vertical members.

• Ensure Proper Load Snapping to Nodes
  • When applying a line load, ensure it snaps to the start and end points of the beam or column. Zoom in and check the load is precisely assigned within the member’s extents.

• Correct Nodes That Are Not Connected to the Structure
  • Extend the Line Load to a position where all components connect in the model.
  • Ensure the node aligns with an existing structural element to maintain proper load distribution.