2011.005

Lukacs, Claire

Gift

Museum Collections. Gift of a friend of the Museum.

1956 - 1956

Date(s) Created: 1956 Date(s): 1956

Notes: Text 2011.005.0235: ANOTHER PRESTRESSED CONCRETE PIER for The Port of New York Authority - [caption beneath top photo] General view of pier deck nearing completion. Post-tensioned pile caps 21' 6" on centers are supported on steel H piles. Pier is 323 feet wide x 702 feet long. [view is north] - [caption beneath lower left photo] Pulling 320-foot length of Roebling strand from barge-mounted reel into pile cap forms. Strand was delivered encased in flexible metal hose and fittings attached ready for placement in form. - [caption beneath lower right photo] Tensioning a strand while standing in railroad well. Use of single long-stroke center-hole ram and threaded connections cuts jacking time to minimum. - IT IS INTERESTING to recall that prestressed [pre-stressed] concrete was specified as an alternate to more conventional designs for Pier C. The results of that project were so satisfactory that prestressed concrete alone was specified for the new Pier A at Hoboken, N. J. - Roebling Tensioning Elements were used for pre-tensioning the deck stringers on both piers, and for post-tensioning the pile caps at Pier A. Several factors led to the choice of Roebling Strand Assemblies for the pile caps: - * Machine fabricated strands permitted larger units and reduced the number of tensioning elements handled on the * For units exposed to tide action, Galvanized Strand Assemblies provided corrosion resistance while curing and minimized friction while tensioning. - * 320-ft. assemblies complete with metal hose and fittings could be pulled into the forms (with stirrups in place) in 15 minutes; - * Quick and easy tensioning with a standard center holeram and threaded connections permitted supervision by regular personnel without need for specialists. - Precast stringers on the new pier, 5 ft. wide x 1 ft. deep and spanning between pile caps 21'—6" on centers, were pre-tensioned with over 400 miles of Roebling %" 7-wire Un-coated Stress-Relieved Prestressed Concrete Strand. - Linear prestressing in America was initiated by Roebling. In fact, after two years of development and tests, Roebling assumed the role of "guinea pig" in 1946 and placed a prestressed concrete floor in its new Chicago warehouse. - Today, as the result of continuous development and participation in all types of prestressed projects, Roebling is the foremost supplier of tensioning materials in the industry. Why hot ask the most dependable source for suggestions and advice on specific applications? Write Construction Materials Division, John A. Roebling's Sons Corporation, Trenton 2, N. J. - Pier A was designed by Parsons, Brinckerhoff, Hall and Macdonald for The Port of New York Authority. Erection including stringer fabrication, by J. Rich Steers, Incorporated. - ROEBLING A Subsidiary of the Colorado Fuel and Iron Corportation - 152 ARCHITECTURAL RECORD APRIL 1956 Status: OK Status By: dw Status Date: 2011-11-29