Used and surplus W30 beams for sale! Buy and sell W30 beams through Eiffel Trading. W30 beams are a steel wide flange beam with a flange dimension of 30”. Common W30 sizes are W30x116, W30x124, W30x132, W30x148, and more. W30 beams are a great size for king pile combiwalls, waler and bracing systems such as cofferdams, and more.