| 摘要 |
PROBLEM TO BE SOLVED: To provide a boom of a work machine that allows the weight of a side wall of a split boom to be reduced and the labor in assembly work to be mitigated.SOLUTION: A body 20 of an insert boom 6c2 includes an overhanging part 26 that overhangs forward from a constituent part 21 of a closed cross-section. The overhanging part 26 has a part 26c configured in an area between an upper edge 22c and a lower edge 22d of a protruded part 22b that protrudes forward of a pair of forward side walls 22 on a forward side of the constituent part 21 of the closed cross-section, and has a portion that protrudes forward to include a tip 26a between a first engaging part 30 and a second engaging part 31 formed on the forward side wall 22. |
