<p>As a cost-effective seismic isolator, the scrap tire pads (STPs) lack a standardized fabrication process, and their in-plane anisotropic mechanical properties remain insufficiently studied. This study investigates the manufacturing method of STPs, with a focus on the mechanical advantages of spliced and bonded scrap tire pads (SBSTPs). The influence of horizontal loading direction (<i>α</i>) on SBSTPs mechanical performance is subsequently examined. The results indicate that while the horizontal equivalent stiffness exhibits only limited variation, the vertical stiffness demonstrates pronounced directional sensitivity. Among the examined directions, both the horizontal equivalent stiffness and the vertical stiffness attain their minimum values when <i>α</i> is 30°. Subsequently, a two-spring model is developed, introducing the sectional radius of gyration (<i>R</i>(<i>α</i>)), which serves as a parameter characterizing the variation of SBSTPs sectional geometric properties with respect to the horizontal <i>α</i>. Based on this model, a formula is established to predict the vertical stiffness of SBSTPs under varying <i>α</i> and shear deformations (<i>u</i>), with the proposed vertical stiffness formulation achieving a goodness-of-fit index of 0.97. The proposed method highlights the fabrication advantages of SBSTPs, reveals their direction-dependent stiffness characteristics, and presents a predictive stiffness model incorporating both <i>α</i> and <i>u</i>, providing a theoretical basis for their application in rural seismic isolation.</p>