Thousands of people who pass over the Golden Gate Bridge likely didn’t notice the four new metal protrusions on its western and eastern flanks. Kymberlyrenee Gamboa did. For the Fair Oaks resident, the four support beams were evidence that the bridge’s ambitious suicide barrier was actually beginning to take form — a project Gamboa and her family had wished was already completed before her 18-year-old son, Kyle, jumped off the bridge five years ago and died. “It was pretty emotional for everybody that has been involved to actually physically see something out there,” Kymberlyrenee Gamboa said. “Because it does take...