Cross-laminated timber (CLT) is produced from renewable bio-composite material and has been gaining popularity in building industry largely due to easily customised panellised construction technique, which is fast, efficient, minimises construction risk and waste. CLT is often considered as a sustainable alternative to traditional construction materials, and can be used to complement steel and concrete to build a sustainable future. CLT is reported to provide excellent resistance against both out-of-plane and in-plane loading but rolling shear properties have been recognized as one of the critical parameters that often controls the design resistance when CLTs are subjected to out-of-plane loading scenario. Rolling shear characteristics are highly dependent on wood species, sawing patterns and width-to-thickness ratio (w_l/t_l) of a single lamella. This paper presents a thorough investigation on rolling shear properties of two types three-layer CLT panels (CL3/105 and CL3/135) produced by XLam from Australian Radiata Pine. Rolling shear properties were measured using two test methods i.e. short-span four-point bending test and planar shear test. Typical rolling shear failures were observed in samples tested using short-span bending method and rolling shear stresses were evaluated by using various analytical methods. Planar shear samples also failed in rolling shear, as expected, and showed comparable results. Existing theoretical approaches were used to evaluate the rolling shear properties with a characteristic rolling shear strength of 2.0 MPa and shear modulus of 65.5 MPa for the considered Radiata Pine CLT panels. In addition, an empirical equation has been proposed based on the rolling shear results for other similar species published in literature and the current observations were compared against the proposed equation.

交叉层压木材（CLT）由可再生的生物复合材料制成，并在建筑行业中广受欢迎，这主要归功于易于定制的拼板化建筑技术，该技术快速，高效，最大程度地降低了建筑风险和浪费。CLT通常被认为是传统建筑材料的可持续替代品，可用于补充钢铁和混凝土以构建可持续发展的未来。据报道，CLT对平面外和平面内载荷均具有出色的抵抗力，但滚动剪切性能已被认为是关键参数之一，当CLT承受平面外载荷时，该参数通常会控制设计阻力。 。轧制剪切特性高度依赖于木材种类，锯切模式和宽厚比（w_升/吨_升）的单个薄片。本文对XLam公司从澳大利亚辐射松生产的两种类型的三层CLT板（CL3 / 105和CL3 / 135）的滚动剪切性能进行了全面的研究。滚动剪切性能是使用两种测试方法测量的，即短跨度四点弯曲测试和平面剪切测试。在使用短跨度弯曲法测试的样品中观察到典型的滚动剪切破坏，并通过各种分析方法评估了滚动剪切应力。平面剪切样品也未能如预期那样在滚动剪切中失败，并显示出可比的结果。现有的理论方法用于评估所考虑的Radiata Pine CLT板的滚动剪切性能，其特征在于滚动剪切强度为2.0 MPa，剪切模量为65.5 MPa。此外，