Transportation officials said crews will begin up-close inspections of the bridge's towers to assess the condition of the steel and determine if any areas need repair. "Our salty marine environment does its best to corrode the steel," district engineer Ewa Bauer said. "The inspection teams will look carefully at every rivet and seam to determine what work we need to do to keep this beautiful structure standing strong."
VIDEO: Security stepped up on Golden Gate Bridge after tower climbing stunt
Engineers will be strapped in to their ropes and pulleys.
Officials said inspection teams will descend by rope from the top of the towers down to the sidewalks, beginning on the west legs of the tower and then moving to the east legs. They will never be directly over traffic.
RELATED: Golden Gate Bridge seismic retrofit to be completed by 2021
Crews have started installing scaffolding Friday on the sidewalks around the towers to protect people passing by below.
Cyclists are also asked to walk their bikes around the towers.
And click here for more videos and stories about the Golden Gate Bridge.