Third or fourth degree heat (thermal) burns

An employee was working inside a power boiler (permit-required confined space) while arc gouging (cutting) a 30-foot long by 27-inch wide I-beam into 5-foot sections. He was standing on the I-beam he was cutting and another I-beam that was positioned 6 inches away. The I-beam he was gouging shifted after he finished cutting through it and moved toward the adjacent I-beam. As the I-beam shifted, it caught his right arm between the I-beams. He sustained third degree burns to his right forearm and hand from the I-beams, which were heated from the arc gouging process.