Spliced tread for ladder and folding ladder

A spliced tread for a ladder, comprising:

• at least two tread units, wherein:
• the at least two tread units comprises at least one of a first tread unit or a second tread unit,
• one end of a top surface of the first tread unit in a width direction of the spliced tread extends in a thickness direction of the spliced tread to form a first connection portion to define a side of the first tread unit,
• a corresponding end of the second tread unit extends in the thickness direction of the spliced tread to form a second connection portion to define a side of the second tread unit,
• the first connection portion of the first tread unit and the second connection portion of the second tread unit are connected to each other, so that the at least two tread units are spliced in the width direction of the spliced tread to form the spliced tread for the ladder, and
• one of:
• the first connection portion comprises at least two first riveting portions protruding in a thickness direction of the first connection portion and spaced apart from each other in a length direction of the first connection portion, the second connection portion comprises at least two second riveting portions recessed in a thickness direction of the second connection portion and spaced apart from each other in a length direction of the second connection portion, and the at least two first riveting portions and the at least two second riveting portions are connected by pressure riveting,
• the first connection portion comprises at least two riveting holes spaced apart from each other in the length direction of the first connection portion, the second connection portion comprises at least two riveting holes spaced apart from each other in the length direction of the second connection portion, and the at least two riveting holes of the first connection portion and the at least two riveting holes of the second connection portion are riveted together by rivets, or
• the first connection portion comprises at least two bolt holes spaced apart from each other in the length direction of the first connection portion, the second connection portion comprises at least two bolt holes spaced apart from each other in the length direction of the second connection portion, and bolts are configured to pass through the at least two bolt holes of the first connection portion and the at least two bolt holes of the second connection portion to be connected to nuts.