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Completed falsework: Decking and some formwork has been added. The illustrations are of modern pipe-column falsework, used to support the formwork for a post-tensioned reinforced concrete flyover connector for the eastern span replacement of the San Francisco-Oakland Bay Bridge. When the supports are complete, wood beams and plywood or reusable ...
Structural failure — support piers collapsed 7 killed, 0 injured Complete failure of two spans on I-5 Due to extreme rainfall, the Arroyo Pasajero experienced high volumes of water at high speed. This caused scouring of the river bed undermining the support piers of both spans. Elhovo bridge over the Tundzha river [43] Elhovo, Yambol Province
A wooden deck was then erected atop the falsework to support the lowest forming surface. Reinforcing for the lowest surface of the box structure was then added, and the concrete was poured. During the initial pour, reinforcing and formwork for interior shear beams and any included tendon conduits were added. Later, another concrete pour was ...
Placement of concrete began at 8:30 am at a rate of around 84 cubic yards (64 m 3) per hour, dropping to 50 cubic yards (38 m 3) per hour later that morning before rising again to 88 cubic yards (67 m 3) per hour. [1]: 113–115 At 1:35 pm the east end of the formwork fell around 6 inches (150 mm). Seconds later the entire deck plunged into the ...
1971 Certej dam failure: Certeju de Sus, Hunedoara County, Romania: Dam: 89 dead, 76 injured 1972: Buffalo Creek Flood: West Virginia, US: Dam: 125 dead, 1,121 injured 1972: Königs Wusterhausen Central Tower: Königs Wusterhausen, Germany: Lattice tower: 1973 Skyline Towers collapse: Bailey's Crossroads, Virginia, US Building under ...
Shoring is designed to prevent collapse where shielding is only designed to protect workers when collapses occur. Concrete-structure and stone-building shoring, in these cases also referred to as falsework, provides temporary support until the concrete becomes hard and achieves the desired strength to support loads.
Falsework required Yes, if cast-in-place reinforced or prestressed concrete is used, which is typical for freeway overpasses Section of a twin box girder bridge Erskine Bridge , near Glasgow, Scotland Single box girder bridge ( concrete ), Australia .
It expanded rapidly in formwork and scaffolding under GKN ownership in the end of the 1980s. [2] In June 2000, GKN Kwikform merged with RMD (Rapid Metal Developments, established in 1948), the formwork and scaffolding unit of RM Douglas (part of Tilbury Douglas), to form RMD Kwikform. [3] [1] Tilbury Douglas renamed itself Interserve in 2001. [4]