NEW DECK REGILDS THE GATE

The deck of San Francisco's fifty year old Golden Gate suspension bridge is being replaced at night in 15m long sections across half the bridge width at a time. High fines, imposed for each minute that all six lanes are not open after 5.30 am, have resulted in negligible delays. Chloride attack on the 175mm thick reinforced concrete slab has caused extensive cracking and the deck and stringer beams are being replaced by orthotropic steel panels stiffened by 300mm deep trapezoidal ribs. The panels slot into cross beams to suit the original structure and are equipped with pedestals so that deck levels are maintained. Precise control of operations has meant that work is done during the day to prepare for the cutting up and removal of deck sections after the closure at 8 pm. Rivets holding the stringers are broken off and replaced by bolts, seal welding of previously installed panels is done and the scaffold forming the work platform is moved into place during the day. Adjoining halves of deck are replaced consecutively together with refurbished walkways. Because the new deck is lighter the new section "hogs" and the old sags visibly; however this rippled profile does not concern the designer. (TRRL)

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 16-18
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00395108
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Aug 31 1985 12:00AM