Rashi on Exodus 25:25/רש"י על שמות כ״ה:כ״ה

1מסגרת — Understand this as the Targum renders it: גדנפא, A RIM. The Sages in Israel are of different opinion as to what this מסגרת signifies. Some say it was on top all the way round the table like the vertical ledge that is on the edges of the table of noble men, whilst others say it was fixed beneath the table from leg to leg on the four sides of the table and that the table-top rested upon that ledge (cf. Menachot 96b and Sukkah 5a).

2ועשית זר זהב למסגרתו AND THOU SHALT MAKE A GOLDEN BORDER TO THE RIM THEREOF —This is the same border spoken of above (v. 24), and here it explains to you that it was fixed to the rim.