A workman employed in shaping and uniting materials, such as wood, metal, etc., into some kind of structure, machine, or other object, requiring the use of tools. Story v. Walker, 11 Lea (Tenn.) 517, 47 Am. Rep. 305; In re Osborn (D. C.) 104 Fed. 7S1; Savannah & C. R. Co. v. Callahan, 49 Ga. 511; Berks County v. Bertolet, 13 Pa. 524.