outer end of the boom and specifically to the outer end of tubular member 50 and similarly as seen in fig3 comprises a yoke like structure having spaced apart bearing brackets 60 aligned bores 62 for receiving bearings or bushings are formed in the respective brackets 60 the connecting means indicated generally at 30 for connecting the lift cylinders to the boom comprises an elongated cylindrical pin 64 extending through aligned bores 66 extending through the center of the central elbow member 56 this tubular design as described will withstand torsional loads such as resulting from side loadings on the stick and bucket much better than conventional rectangular or square boxed designs because of the uniform distribution of stresses within the boom member this construction also limits the number of welding procedures required and thus because of its simplicity the welding can be much better controlled moreover the amount of weld required can be reduced by approximately two thirds it has also been found that this tubular construction can be much lighter in weight for the same relative strength the method of construction or fabrication of the boom in accordance with the present invention includes cast forming the central elbow section 46 to have a substantially uniform circular cross section and diameter throughout its length the member 46 can be cast formed with the pin member 64 in place or the member can be cast formed with a bore for receiving.