Series I contains materials relating to club membership and includes lists of members organized by year, chronologically, and alphabetically; and lists of officers and committee members. Records relating to meeting attendance and membership information forms compiled for the 30th anniversary of the club are included in this series. The information forms contain biographical data such as work histories, education, etc. Series II consists of meeting minutes. Series III is primarily correspondence and pertains to meeting attendance, remembrance of deceased members, committees, budgetary expenditures, topics of weekly meetings, and the Oregon State College Masonic student organization the Square and Compass Club. Series IV contains publications published for the Triad Club membership and includes booklets commemorating the club's 30th and 50th anniversaries, the club Songbook, and printed quotations and invocations by club chaplain and member Delmer Goode.

Series V consists of copies of the club's constitutions and bylaws, as well as revisions and amendments to the original charter. Series VI consists of newspaper clippings from and on the activities and deaths of Triad Club members, the history of OSU, and the Square and Compass Club. Series VII is a scrapbook with newspaper clippings on Triad club events and members, Christmas cards, thank you notes, and correspondence. Materials date from 1926 to 1940. Series VIII contains photographs of club members in group shots, monthly meetings, and holiday parties. Series IX is an audiotape recording and two scripts of a speech delivered by Ken Munford for the 60th Anniversary celebration. Series X consists of two artifacts: the old gavel used to open club meetings and a charter member ribbon prepared for the 30th Anniversary celebration.