A fuselage structure splice comprising: a first panel having a first-panel major face and a first edge; a strap connected to the first panel, wherein the strap extends along the first edge of the first panel and has a first strap surface in contact with the first-panel major face and a second strap surface tapering toward the first panel with distance from the first edge of the first panel; a first stringer mounted on the first-panel major face, extending away from the first edge of the first panel, and having a first flange mounted to the first-panel major face; and a first fitting having a first stringer base portion and a first strap base portion, wherein the first stringer base portion is connected to the first flange of the first stringer and extends along a first line extending in a first plane normal to the first edge of the first panel, the first strap base portion is mounted on the second strap surface and extends along a second line in the first plane, the second line is transverse to the first line, and the first strap base portion has a constant thickness along the second line, wherein the first fitting includes an intermediate base portion connecting the first stringer base portion to the first strap base portion, the intermediate base portion has a third fitting surface facing the first panel, the third fitting surface extends along a third line extending in the first plane, and the third line is transverse to the first line and the second line; wherein the first stringer base portion has a first fitting surface that is in contact with the first flange and extends parallel to the first line, the first strap base portion has a second fitting surface that is opposite the strap, and the second fitting surface extends along the strap in the first plane parallel to the second line; wherein a first panel region of the second strap surface ends at a strap edge (123a2) that is distal of the first edge of the first panel, the strap edge is spaced from the first strap surface, the strap includes a strap side face that connects the first strap surface to the second strap surface, the first strap base portion has a fourth fitting surface opposite to the second fitting surface and is facing and spaced from the first panel region and that is in contact with the strap, the first fitting further includes a stepped fitting edge joining the third fitting surface to the fourth fitting surface, and the stepped fitting edge faces the strap side face, wherein the strap base portion has a first thickness transverse to the fourth fitting surface, wherein the intermediate base portion has a second thickness transverse to the third fitting surface, wherein the first thickness is less than the second thickness. a first panel having a first-panel major face and a first edge; a strap connected to the first panel, wherein the strap extends along the first edge of the first panel and has a first strap surface in contact with the first-panel major face and a second strap surface tapering toward the first panel with distance from the first edge of the first panel; a first stringer mounted on the first-panel major face, extending away from the first edge of the first panel, and having a first flange mounted to the first-panel major face; and a first fitting having a first stringer base portion and a first strap base portion, wherein the first stringer base portion is connected to the first flange of the first stringer and extends along a first line extending in a first plane normal to the first edge of the first panel, the first strap base portion is mounted on the second strap surface and extends along a second line in the first plane, the second line is transverse to the first line, and the first strap base portion has a constant thickness along the second line, wherein the first fitting includes an intermediate base portion connecting the first stringer base portion to the first strap base portion, the intermediate base portion has a third fitting surface facing the first panel, the third fitting surface extends along a third line extending in the first plane, and the third line is transverse to the first line and the second line; wherein the first stringer base portion has a first fitting surface that is in contact with the first flange and extends parallel to the first line, the first strap base portion has a second fitting surface that is opposite the strap, and the second fitting surface extends along the strap in the first plane parallel to the second line; wherein a first panel region of the second strap surface ends at a strap edge (123a2) that is distal of the first edge of the first panel, the strap edge is spaced from the first strap surface, the strap includes a strap side face that connects the first strap surface to the second strap surface, the first strap base portion has a fourth fitting surface opposite to the second fitting surface and is facing and spaced from the first panel region and that is in contact with the strap, the first fitting further includes a stepped fitting edge joining the third fitting surface to the fourth fitting surface, and the stepped fitting edge faces the strap side face, wherein the strap base portion has a first thickness transverse to the fourth fitting surface, wherein the intermediate base portion has a second thickness transverse to the third fitting surface, wherein the first thickness is less than the second thickness.