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News and Insights on the Masonry Repair and Maintenance of Institutional, Commercial, and Condominium Buildings in Greater Boston and Eastern Massachusetts

Volume 16 No. 2

Fall 2024

In this issue, our Case Study article describes our comprehensive masonry repair project at the historic Riverside Theatre building church building in Boston's Hyde Park neighborhood. Our Masonry 101 article describes jack arches and their use.

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Case Study

Abbot Completes Comprehensive Masonry Repair Project at the Historic Riverside Theatre Building in Hyde Park

Abbot recently completed a comprehensive masonry repair project at the historic Riverside Theatre located in the Cleary/Logan Square area of Hyde Park, MA. The three-story brick building was originally constructed in 1897, sustained a fire just 15 months later, and was immediately rebuilt surpassing its original size. Completed in 1899, the new rebuild retained parts of the earlier façade, and included a 700-seat opera house auditorium, with a masonic hall on the third floor.

 

Now, the first floor is used for retail while the upper floors are used to provide a portfolio of fine arts programs for young adults in New England and throughout the United States.

 

Replacement of Rusted Steel Lintels


The scope of the work focused on the deteriorated front and left sides of the building façade. The major portion of the project involved the replacement of the rusted steel lintels above the second floor windows that could only be accessed by taking out the decorative jack arches over each window. Abbot removed the rusted old lintels, replaced them with new matching galvanized lintels, and installed flashing on the lintels. The jack arches were then returned to their original position. Abbot also cut and pointed various locations on the facades.

 

Demolition of Damaged Brick


Then, Abbot demolished and replaced the damaged brick primarily located around the step cracks that in some instances had formed as a result of the rusted lintels above the second floor windows.

 

Minor Roof Repairs


Finally, Abbot performed minor repairs to the roofline where the rubber at the top of the barrel arch was stripped and the flashing along the ledge where the barrel arch meets the roofline was replaced.

 

The entire project went seamlessly and was completed on time to the satisfaction of the building owner.

 

Resourcing Matching Brick Challenging


Perhaps the most challenging aspect of the project was the difficulty in resourcing an appropriate color and size of the original older brick. In the end, Abbot was able to locate a sufficient number of bricks to mix into the facades along with the original bricks they were able to salvage. Combined with the use of matching pointing, the overall appearance is as if the work had never been done.

 

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In October 1995, the Massachusetts Historical Commission announced that the building contributes to the architectural quality of the Cleary/Logan Square area thus making it eligible for the National Register of Historic Places.

Masonry 101

Jack Arches

In our Case Study article, we mention the need to remove the decorative jack arches above the second floor windows of the theatre building to allow for the rusted steel lintels to be replaced.


Individual Masonry Elements Formed into a Wedge Shape


A jack arch is an assembly of specially shaped bricks used as a decorative accent and structural element to support openings over windows and doors.


Alternate names are lintel arch, flat arch and straight arch. Unlike regular arches, jack arches are not curved in form. Instead, they are flat in profile and are used under the same circumstances as lintels. Unlike lintels, which are subject to bending stress, jack arches are composed of individual masonry elements cut or formed into a wedge shape that efficiently uses the compressive strength of the masonry in the same manner as a regular arch. Like regular arches, jack arches require a mass of masonry to either side to absorb the considerable lateral thrust created by the jack arch.


Constructed of Smaller Pieces for Easy Handling


Jack arches have the advantage of being constructed from smaller pieces of material that can be handled by individuals, as opposed to lintels which must necessarily be monolithic and which must be oversized unless reinforced by other means.


Precise and Consistent Joint Width


In small-scale brick masonry projects, jack arches are typically sawn from an appropriately sized fired-clay lintel, giving a more precise and consistent joint width than field-sawn shapes.

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