Circular hollow sections are commonly used in lattice towers.
The geometry of hollow circular sections provides particularly
effective compression members. Fully developed welded endconnections
are generally considered to be uneconomical and
flattened end connections provide economical benefits and simple
fabrication. The process of flattening the ends of circular
hollow sections reduces the overall stiffness of the member
and introduces eccentricities at the junctions. The reduction in
stiffness and the influence of such eccentricities are not taken
into account in the design process. This paper examines the
influence of the flattened ends and the eccentricities and recommends
a rational design process to account for such effects.