A client in Fremont, CA had a requirement to add two HVAC (Heating, Ventilation, Air Conditioning) units onto their roof. We were called in to weld the structural steel reinforcement for these two units. We brought in the steel and cut the beams onsite. After the beams were cut to fit and welded into place, we opened the roof for the HVAC curbs to be installed. Welding the W10x15 I-beams was done with ER7018 filler as per engineering requirements.