Service access floor panel

An access floor panel comprising:

• a base that includes an elongated first member (a) that includes spaced longitudinal side walls and spaced inwardly extending top wall portions that extend inwardly from tops of the spaced longitudinal side walls toward each other and (b) defining a first slot having (1) a first depth in a thickness direction of the access floor panel, (2) a first longitudinal axis in a longitudinal direction that is perpendicular to the thickness direction and (3) a first slot opening formed by and between the inwardly extending top wall portions in a top of the base in the thickness direction;
• a top plate (1) attached to the base on the top of the base in the thickness direction and (2) having a first top plate elongated opening that is aligned with the first slot opening of the first slot;
• and
• a fastener assembly that is received through the first top plate elongated opening and the first slot opening and affixed to the inwardly extending top wall portions to attach another member to the access floor panel.