Layered body and layering method

A lamination method of laminating a second layer that includes a plurality of second composite sheets in a state of being in contact with a first layer that includes a plurality of first composite sheets, in which

• each first composite sheet of the plurality of first composite sheets has a first longitudinal direction and a first lateral direction and is formed in a form of a sheet that includes a first fiber base material oriented in a first fiber direction having a first predetermined angle with respect to the first longitudinal direction and a first resin material, and
• each second composite sheet of the plurality of second composite sheets has a second longitudinal direction and a second lateral direction and is formed in a form of a sheet that includes a second fiber base material oriented in a second fiber direction having a second predetermined angle with respect to the second longitudinal direction and a second resin material, the method comprising:
• a first laminating step of disposing the plurality of first composite sheets along an arrangement direction such that an end portion in the first longitudinal direction of each first composite sheet on one side and an end portion in the first longitudinal direction of an adjacent first composite sheet on the other side, which is adjacent to the first composite sheet on the one side, are in contiguity with each other in a state where the end portions do not overlap each other in a thickness direction and the first longitudinal direction of each first composite sheet on the one side and an adjacent first longitudinal direction of the first composite sheet on the other side intersect with each other;
• and
• a second laminating step of disposing the plurality of second composite sheets along the arrangement direction such that an end portion in the second longitudinal direction of each second composite sheet on one side and an end portion in the second longitudinal direction of an adjacent second composite sheet on the other side, which is adjacent to the second composite sheet on the one side, are in contiguity with each other in a state where the end portions do not overlap each other in the thickness direction and the second longitudinal direction of each second composite sheet on the one side and the second longitudinal direction of an adjacent second composite sheet on the other side intersect with each other,
• wherein
• each of the plurality of first composite sheets is formed linearly in the first longitudinal direction,
• each of the plurality of second composite sheets is formed linearly in the second longitudinal direction, and
• at least one of the first predetermined angle and the second predetermined angle is 0 degrees, the first longitudinal direction is coincident with the first fiber direction when the first predetermined angle is 0 degrees, and the second longitudinal direction is coincident with the second fiber direction when the second predetermined angle is 0 degrees.