The Eliot Memorial Bridge, a stone arch pedestrian bridge, was constructed circa 1904 in the Blue Hills Reservation. The bridge carries the popular Skyline Trail over a ravine. In certain areas where the mortar had deteriorated, outer face stones...
Designed by Lorado Taft, the Indian stands on a high bluff in Lowden State Park as a tribute to Native Americans. The 50 ft figure, dedicated in 1911, is composed of structural concrete with an architectural concrete exterior. The concrete...
This seventeen-story structure is one of several architecturally significant, mid-century modernist concrete buildings designed by Josep Lluís Sert for Boston University’s campus. The tower's concrete facade deteriorated over time,...
Now part of Pacific Gas & Electric Company’s (PG&E’s) General Offices, The Matson Shipping Building (215 Market Street) was constructed in 1924 and is listed on the National Register of Historic Places. The seven-story annex...
Now part of Pacific Gas & Electric Company’s (PG&E’s) General Offices, The Matson Shipping Building (215 Market Street) was constructed in 1924 and is listed on the National Register of Historic Places. After performing an...
The Massachusetts Bay Transportation Authority (MBTA) uses the Quincy Bus Garage to repair, maintain, and store many buses that they own and operate. The building includes three garage bays, offices, and locker facilities for the bus...
Built in 1926, St. Dominic’s Church was designed by Arnold S. Constable and the Beezer Bros. of Seattle with a blend of collegiate and English Gothic-Revival styles. The church sought to arrest heavy leaks and address deteriorating and...
Griffith Observatory, which sits on the southern slope of Mount Hollywood, is a Designated Historic-Cultural Monument for the City of Los Angeles. The Art Deco observatory, constructed in 1935, was envisioned and funded by Col. Griffith J....
The Hampden County Courthouse was designed by Henry Hobson Richardson and is listed on the National Register of Historic Places. Constructed in 1871, the courthouse features a thick-walled, gneiss stone facade. SGH assessed the condition of the...
The Central Artery/Tunnel (CA/T) Project relocated Boston’s elevated Central Artery below ground. The CA/T tunnel walls used soldier pile tremie concrete (SPTC) slurry walls as a component of the final structure. During later stages of...
Fiber Reinforced Polymer (FRP) composite lining systems are used by major municipalities throughout the United States to structurally rehabilitate and upgrade large diameter pipelines. For internal Carbon Fiber Reinforced Polymer (CFRP)
Arizona Public Service Company’s Cholla Power Plant has four units with circulating water lines made of 66 in. to 72 in. diameter prestressed concrete cylinder pipe (PCCP) in Units 2, 3, and 4. PCCP in these three units has been in
A long performance history dating to the time of the Romans shows that concrete can be a very long-lasting material that requires very little routine maintenance. However, concrete is not invincible.
Kirk M. Stauffer and Kevin C. Poulin published an article titled, “Repair of Draped Mesh Slabs,” in the January/February 2015 issue of Concrete Repair Bulletin. In the article, Kirk and Kevin discuss the history, prevalence,...
SGH's Scott A. Tomlinson, Erik W. Farrington, and Makoto S. Weinstein recently published an article in Civil + Structural Engineer Magazine. The article titled, “Build Strong Guards: Part 2,” is a follow up to...
The Association for Preservation Technology Northeast Chapter (APTNE) held their 2015 Annual Symposium in New York on 6 February 2015. At this symposium, Nathaniel B. Smith and Milan Vatovec gave a presentation titled, “Wood for...
On 14 January, WoodWorks Wood Products Council presented a webinar titled “Durable Design: Lessons from Historic Wood Structures,” featuring SGH's Matthew B. Bronski. The webinar had almost 1,000 attendees, which is one of...
New England is home to many iconic and historic bridges. Within the Boston area, many well-known historic bridges cross the Charles River connecting Boston to Cambridge. Typically, these bridges have a distinctive masonry component related to the...
By: Mehdi Zarghamee, Michael McReynolds, Bill Sleeper, Anna Pridmore
Abstract: Metropolitan Water District of Southern California (MWD) was one of the first agencies to adopt the use of Carbon Fiber Reinforced Polymer (CFRP) as a method to repair distressed Prestressed Concrete Cylinder Pipe (PCCP) starting in the...
Abstract: Repairing failed materials in building enclosures is often difficult and expensive. Take the example of walls, which require exterior access, removal of materials, and replacement of cladding. Below-grade, blindside waterproofing repair...