The water distribution system in Cheyenne includes four prestressed concrete cylinder pipelines (PCCP), approximately 13.5 mi long. The 16 to 30 in. dia., lined-cylinder pipes (LCP) were installed between 1950 and 1962. Three of the PCCP carry...
For the R.O. Pickard Environmental Centre digester expansion program, the owner's engineer envisioned two structurally-identical, modified, egg-shaped digesters founded on drilled piers extending 80 ft to bedrock. The general contractor elected...
A portion of The Colonade’s parking structure, constructed with precast concrete plank supported on precast prestressed concrete beams, was beyond repair. SGH worked with the demolition contractor to develop construction documents for...
DN Tanks (formerly Natgun) designs and constructs prestressed concrete liquid storage tanks. The tanks are American Water Works Association (AWWA) D110 prestressed wire-wound concrete tanks that incorporate precast concrete panels. SGH developed...
Recognizing sports and fitness are important to the campus community, Worcester Polytechnic Institute (WPI) wanted to update its current facilities by constructing a new sports and recreation center. The facility includes a precast concrete...
This article examines the structural considerations of modifying existing PC floor elements and provides a case study where these methods were used successfully. The focus is on simply supported tee beams with fully bonded strands. It is...
By: Robert Holland, Kurtis, Kimberly E., Moser, Robert D., Kahn, Lawrence F., Aguayo, Fred, Singh, Preet M.
Abstract: The article presents a forensic investigation of precast prestressed concrete piles removed from the I-95 Turtle River Bridge, near Brunswick, GA. The piles exhibited extensive damage that led to the discovery of unexpected threats to...
Abstract: An investigation of the stability of the roof of an 85-ft diameter cylindrical prestressed concrete wastewater treatment tank is presented. The roof of the tank is a very thick, shallow spherical dome. With a 1/16 rise to span ratio, 2...
Abstract: The identification and rehabilitation of circular prestressed concrete tanks to increase their service lives by implementing tested standards such as ANSI/AWWA D110 and ACI 372 is discussed. A prestressed concrete tank is mainly a...
In a recent interview, Simpson Gumpertz & Heger (SGH) Senior Principal Rasko Ojdrovic gave an overview of his experience with pipelines and discussed some challenges of this work.