In recent years, there has been a global trend towards designing sustainable buildings using wood as the main structural material in both high-rise and low-rise construction. Cross Laminated Timber (CLT) is a relatively new mass timber material deemed a promising structural element for a variety of applications considering its mechanical characteristics. CLT panels can be used in both lateral and vertical load resisting systems (LLRS & VLRS) of a building whether it is an all-timber or hybrid structure. As a component of LLRS in both platform and balloon type construction methods, it is mainly used as shearwalls subjected to lateral in-plane loadings. The most common application of CLT panels is as horizontal floors that transfer the vertical loads to the supporting members through out-of-plane bending, while also acting as a diaphragm, transferring induced lateral loads to vertical elements of LLRS. Besides its use as floor systems, CLT can also be used as walls in the VLRS subjected to axial in-plane compression from gravity and live loads; as well as possible out-of-plane loading due to wind loads or offset vertical loads. Whether it is utilized as a part of LLRS or VLRS, it is possible to induce effects from other type of loading e.g. CLT platform or CLT balloon shearwalls taking gravity load at each floor level. There is a significant amount of research performed on CLT under mentioned loading scenarios leading to a consensus on the behavior and design parameters to an acceptable extent.
In addition to the common applications such as walls and floors discussed above, CLT can be used as beam, header or girder members, with loads applied on its edge. One example is a lintel spanning over a large opening. Some literature suggests that CLT beams may behave superior over solid or glued laminated timber members, in terms of strength and robustness, due to their orthogonally bonded layers, but only limited research in this area is available. There is currently no standardized design information on use of CLT beams subjected to in-plane loading in North America. Additionally, a CLT beam could be subjected to an eccentric load due an offset of the floor on the beam or when the CLT beam supports a floor via a ledger support. Such situations make the problem more complex in terms of stress states and potential failure modes. The current study investigates the behavior of deep CLT beams, girders or lintels, (thereafter called CLT lintel, abbreviated CL) under edge-wise concentric and eccentric loadings.