A system for bonding a structural component to a rail that comprises a bottom surface , a first sidewall extending from the bottom surface , a plurality of blind holes defined in the bottom surface , and a second sidewall extending from the bottom surface , so that a channel is defined by the bottom surface , the first sidewall , and the second sidewall , the system comprising: a plurality of spacers , each comprising a stem and a top portion , extending substantially perpendicular to the stem , wherein: the stem of a given spacer of the plurality of spacers is configured to be positioned in a corresponding one of the plurality of blind holes such that a longitudinal axis of the top portion of each of the plurality of spacers is parallel to a longitudinal axis of the channel , at least a portion of the structural component is configured to be positioned into the channel such that the structural component rests on the top portion of the plurality of spacers , the stem of each of the plurality of spacers comprises a first side , a second side opposite the first side , a third side , and a fourth side , opposite the third side , the first side and the second side of the stem are substantially flat and are parallel to the longitudinal axis of the channel , and each of the third side and the fourth side of the stem has a radius of curvature , corresponding to a diameter of each of the plurality of blind holes . a plurality of spacers , each comprising a stem and a top portion , extending substantially perpendicular to the stem , wherein: the stem of a given spacer of the plurality of spacers is configured to be positioned in a corresponding one of the plurality of blind holes such that a longitudinal axis of the top portion of each of the plurality of spacers is parallel to a longitudinal axis of the channel , at least a portion of the structural component is configured to be positioned into the channel such that the structural component rests on the top portion of the plurality of spacers , the stem of each of the plurality of spacers comprises a first side , a second side opposite the first side , a third side , and a fourth side , opposite the third side , the first side and the second side of the stem are substantially flat and are parallel to the longitudinal axis of the channel , and each of the third side and the fourth side of the stem has a radius of curvature , corresponding to a diameter of each of the plurality of blind holes . the stem of a given spacer of the plurality of spacers is configured to be positioned in a corresponding one of the plurality of blind holes such that a longitudinal axis of the top portion of each of the plurality of spacers is parallel to a longitudinal axis of the channel , at least a portion of the structural component is configured to be positioned into the channel such that the structural component rests on the top portion of the plurality of spacers , the stem of each of the plurality of spacers comprises a first side , a second side opposite the first side , a third side , and a fourth side , opposite the third side , the first side and the second side of the stem are substantially flat and are parallel to the longitudinal axis of the channel , and each of the third side and the fourth side of the stem has a radius of curvature , corresponding to a diameter of each of the plurality of blind holes . <EOS>