The aim of this study is to determinate the distortion tendencies which were formed by various welding sequences (WS) in the welded lattice beams. Distortion tendencies in the beams were determined by means of distortion forces. Distortion forces created by different applications of WS in the lattice beam were transferred to data-logger and then to a personal computer. The relationship between WS and distortion forces was analyzed. Effects of three different combinations of WS on distortion forces in the lattice beam were determined. It was found that minimum distortion tendencies were observed for WS includes homogenous heat gradient and welding joint points arranged far from to each other on the lattice beam.