Behavior of metal-plate-connected trusses with square-end webs

Metal-plate-connected trusses are presently fabricated with webs cut to produce tight joints and approximately equal panel lengths on the top and bottom chords. This paper evaluates the structural feasibility of replacing these custom-cut webs with webs that have square end cuts and come in a few st...

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Bibliographic Details
Published in:Forest products journal 1996-06, Vol.46 (6), p.78-84
Main Authors: Stahl, D.C. (University of Wisconsin, Madison, WI.), Cramer, S.M, Wolfe, R.W
Format: Article
Language:English
Subjects:
APLICACIONES DEL ORDENADOR
APPLICATION DES ORDINATEURS
Applied sciences
ASSEMBLAGE EN BOIS
Building construction
Buildings. Public works
Commodities
Custom design
Design
Design engineering
Design specifications
Exact sciences and technology
Forest products industry
JUNTAS
LOGICIEL
PROGRAMAS DE ORDENADOR
SIMULACION
SIMULATION
Stresses. Safety
Structural analysis. Stresses
Studies
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Description
Summary:Metal-plate-connected trusses are presently fabricated with webs cut to produce tight joints and approximately equal panel lengths on the top and bottom chords. This paper evaluates the structural feasibility of replacing these custom-cut webs with webs that have square end cuts and come in a few standard "commodity" lengths. A computer model was developed to simulate the behavior of trusses with square-end webs and its performance was verified by comparison with data from full-scale truss tests. The model and the test data showed that moments in chords and webs were affected by the presence of square-end webs, raising the possibility that higher grade chords and/or webs could be required. The square ends themselves have less effect on member forces when the web length is such that panel lengths are approximately equal. Although plate buckling did not directly cause failure of any of the trusses tested or modeled, we believe that plate buckling should be treated as a truss failure mode for design purposes. Given this limitation and the narrow scope of this study, we believe that the use of square-end webs is feasible from a structural viewpoint
ISSN:0015-7473
2376-9637