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Comparison Fink vs. Howe roof truss

First, here is what the two trusses have in common :

and now the difference :

So, you think one would prefer the Fink-truss. Right ?

A second look at the data reveal though that in the Howe-truss two members, 26 and 47, are zero-force members. Either member does NOT even prevent a member from buckling and are therefore indeed superfluous !! Leave them out for a saving of 4 m of material, which now give this new Howe-truss the edge !!


  • Force P = 600 N
  • Length a = 4 m
  • Length b = 4 m
Fink-truss



  • Force P = 600 N
  • Length a = 3 m
  • Length b = 4 m
Howe-truss


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Zig Herzog, hgn@psu.edu

Last modified : Sat Aug 09, 1997