Shivam Sharma, Bruno Paini, Soham Mitra, Sreekanta Das and Mark D. Hagel
Shivam Sharma, Graduate Student, University of Windsor, 401 Sunset Avenue, Windsor, ON, Canada, sharm189@uwindsor.ca
Bruno Paini, 2 Graduate Student, University of Windsor, 401 Sunset Avenue, Windsor, ON, Canada, paini@uwindsor.ca
Soham Mitra, Research Associate, University of Windsor, 401 Sunset Avenue, Windsor, ON, Canada, mitras@uwindsor.ca
Sreekanta Das, Professor, Department of Civil and Environmental Engineering, University of Windsor, 401 Sunset Avenue, Windsor, ON, Canada, sdas@uwindsor.ca
Mark D. Hagel, Executive Director, Alberta Masonry Council, 2725 12 St NE #205, Calgary, AB, Canada, markhagel@albertamasonrycouncil.ca
ABSTRACT
In Canada, clay brick veneers are often used to protect residential, commercial, and institutional buildings from external weather, thermal, and noise conditions, while allowing the building to
maintain a pleasant architectural appearance. Wood-framed loadbearing structural systems are increasingly paired with this kind of brick veneer wall. However, these brick veneers often utilize a steel angle, known as shelf angle, attached to the rim boards of the wood framing floor system as a means to support the brick veneer. The through-bolts, commonly used for this type of connection, pose a problem in terms of thermal efficiency, as they must penetrate through the wood framing envelope. To overcome this problem, lag screws have been introduced to replace the
through-bolts. However, there is very limited test data available for designing the shelf angle and spacing of lag screws for various wood framing systems. Hence, an experimental study has been completed to determine the structural interaction between a wood flooring system and the shelf angles that connect the rim boards to the brick veneer using lag screws and through-bolts as
fasteners. The displacement of the connection subjected to vertical loads of brick veneer, stiffness, rotation of the rim board, and failure modes of the lag screw and through-bolt connection were investigated. This paper presents the test specimens, test procedures, and results obtained from this study.
KEYWORDS: experimental testing, lag screw, shelf angle, through-bolt
