Frame for a construction machine

A frame of a construction machine comprising:

• a center member including a bottom plate and a pair of left and right vertical plates being horizontally disposed at intervals on a top surface of the bottom plate, extending longitudinally, and being provided with a counterweight attaching part at a back end part;
• a pair of left and right skirt members being horizontally disposed on both left and right sides of the center member and extending in longitudinal direction;
• and a plurality of beam members disposed at intervals in a longitudinal direction between the center member and right skirt member and between the center member and left skirt member, respectively;
• wherein a plurality of beam members include a plate beam member disposed in a perpendicularly erected manner against the bottom plate;
• wherein the plate beam member is formed with first and second bent parts;
• and wherein the plate beam member includes a first part extending outward in a horizontal direction from the center member to the first bent part, a second part extending from the first to second bent part, and a third part extending outward in a horizontal direction from the second bent part to the skirt member.