moving load

This week’s truss: Moving Load


This truss has two plate pairs at 101% capacity with a 2000lb concentrated moving load applied to each panel and mid-panel point (i.e. at each vertical and halfway between each pair of verticals or the end of the truss). Without changing the load, how would you modify this truss to bring it under capacity?

Top Chords: Douglas Fir Larch Select Structural
Bottom Chords: Douglas Fir Larch Number 2
End Verticals: Douglas Fir Larch Number 3
Webs: Douglas Fir Larch Number 2

Building Code: IBC 2021

Loads(psf unless otherwise noted):
TC Live Load 20
TC Dead Load 10
BC Live Load 0
BC Dead Load 10
Application: Residential

Wind: 110MPH

The answer will be posted on Thursday! This is not a production truss! This is simply an example for Truss Tuesday conversation.

Passing Moving Load

Updated Thursday, February 22nd, 2024


There are many ways you could fix the issues with this truss, but stacking the webs at the failing plate pairs gives the teeth more area to bite and brings the capacities within acceptable parameters.