The Benefits of Concealed Lintel Systems in Modern MasonryWords: Chris Mason, Hohmann & Barnard Inc.Photos: MizanurPhotography, Shutterstock.comWhen looking at iconic structures built throughout history, one of the most recognizable architectural elements is the masonry arch. These arches are not only aesthetically and visually pleasing but also serve as an engineering solution for structural stability and durability. Masonry arches have played a fundamental role throughout history, with examples constructed by ancient civilizations that continue to stand today.What is a Masonry Arch and How Does it Work?Typically constructed from blocks of stone or masonry units placed side by side to form a curved structural element, masonry arches are used to span openings, support loads above, and provide architectural character. These applications can be found in barrel and vaulted ceilings, aqueduct systems, underground drainage structures, passageways, and corridors, as well as door and window openings.Masonry arches can take many forms, including semicircular, segmental, elliptical, Gothic (pointed), and flat arches. The masonry units are arranged to form an arch with a keystone located at the center, providing stability by wedging and holding the masonry elements tightly together. This allows loads to be transferred through compression, making the arch both structurally efficient and visually appealing.The Impact of Modern Construction on Masonry StructuresWith advancements in construction methods, cavity wall design, moisture management systems, energy efficiency requirements, masonry manufacturing, and the need to optimize construction schedules, the use of structural multi-wythe masonry and heavy stone construction has become far less common than in previous centuries.Today, many masonry wall assemblies are designed as anchored veneer systems consisting of a masonry exterior, drainage cavity, insulation, air and water-resistive barriers, and a structural backup wall. These systems provide the same traditional appearance and aesthetic appeal architects strive for, while meeting modern performance requirements for energy efficiency, moisture control, and constructability.While modern masonry veneers are generally non-load-bearing, they continue to provide durability, weather resistance, and architectural character, with loads transferred through engineered anchorage systems to the building structure. How are Modern Masonry Veneers Supported?As construction practices have evolved toward masonry veneer and cavity wall construction, concealed lintel systems have emerged as an alternative to conventional visible support members while maintaining architectural expression and masonry authenticity.The design and development of concealed lintel systems have become an important solution for architects seeking to incorporate traditional masonry features into modern building envelopes. These systems are engineered steel support assemblies designed to carry masonry loads above openings while keeping the structural support hidden within the wall assembly.Unlike conventional exposed steel angles or visible support members, concealed lintel systems preserve the visual continuity of the masonry veneer and allow the masonry itself to remain the architectural focal point.Concealed lintel systems are often selected when the design intent calls for clean soffits, uninterrupted masonry spans, arched openings, specialized brick features, and the appearance of traditional all-masonry construction. These custom-engineered solutions can be designed to support flat arches, segmental arches, varied coursing patterns, corbelling, deep reveals, and complex opening geometries while eliminating exposed steel that may otherwise impact the appearance of the finished façade.Benefits of Concealed Lintel SystemsConcealed lintel systems offer a number of architectural and functional advantages:Preserve the authentic appearance of masonry at openings and architectural features.Conceal structural support components, improving aesthetics and maintaining focus on the masonry craftsmanship.Accommodate custom shapes, arches, corners, deep soffits, corbelling, and complex veneer detailing.Eliminate the appearance of exposed steel support members.Provide design flexibility for a wide range of masonry applications.It can be engineered for various backup wall conditions, including steel stud, CMU, concrete, and structural steel systems.Support architectural designs that would otherwise be difficult to achieve using conventional visible support methods.Design and Coordination ConsiderationsSuccessful implementation of a concealed lintel system requires coordination among the architect, structural engineer, masonry contractor, and manufacturer early in the design process.Factors such as opening spans, masonry loads, backup wall conditions, masonry geometry, differential movement, moisture management, and installation sequencing should all be considered during design and detailing.Manufacturers of concealed lintel systems typically provide project-specific engineering, shop drawings, structural calculations, and installation guidance as part of the overall design package. Early collaboration helps ensure that architectural intent, structural performance, and constructability are aligned before construction begins.Proper detailing and integration within the wall assembly contribute to long-term durability while protecting the structural support system from direct environmental exposure.Preserving Traditional Masonry Design in Modern ConstructionThe architectural appeal of masonry arches and decorative masonry detailing remains as strong today as it has throughout history. While modern wall systems have evolved to meet contemporary performance requirements, architects and owners continue to seek the timeless beauty and permanence associated with traditional masonry construction.Concealed lintel systems help bridge the gap between historic architectural expression and modern building technology. By combining engineered structural support with today's cavity wall construction practices, these systems allow designers to incorporate arches, corbelling, deep soffits, and other distinctive masonry features without compromising building performance.Owners, architects, and the design community can confidently incorporate traditional masonry elements into projects such as houses of worship, universities, libraries, civic buildings, and other landmark structures where the design calls for a statement of enduring character and craftsmanship.In the end, concealed lintel systems help ensure that the architectural vision remains focused on what masonry has always done best, providing strength, beauty, and a lasting impression.About: MAP Partner
