Influence of Sheathing Gaps on Wood Floor Systems
Keywords:Beams, composite structures, construction materials, deflection, deformation, fasteners, floors, joists, loads (forces), mechanics, moments, plywood, stresses
This paper describes a comparative study of the partial composite action of wood floors with and without sheathing gaps. The beams investigated consist of plywood sheathing bonded to joists with elastomeric adhesive. Beams are considered to be simply supported and subjected to uniformly distributed loading. Results for continuous sheathing, open gaps at third and fourth points are compared and displayed graphically.
It is shown that the influence of gaps on the partial composite action is drastic and can increase deflections by as much as 82%, compared to a system with continuous sheathing. Little difference is obtained when comparing a beam with gaps at third and fourth points.
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