Fixed ladders consist of the following components:  Fixed ladders are generally made of steel or aluminum,  but can also consist of reinforced polymers, stainless steel, hot dipped galvanized steel, or wood. Donn Trenner  Donald Trenner (March 10, 1927 – May 16, 2020) was an American jazz pianist and arranger born in New Haven, Connecticut. He began his career playing with Ted Fio Rito from 1943–45, and followed this with a slot in Buddy Morrow's orchestra in 1947. He worked with Charlie Barnet in 1951 and following this with Jerry Gray, Charlie Parker, Stan Getz, Georgie Auld, Jerry Fielding, Skinnay Ennis, Les Brown, Dick Haymes, Jack Jones, Lena Horne, Ann-Margret, Shirley MacLaine and Nancy Wilson. In 1957 he played with Oscar Pettiford and toured Europe in 1958 with Anita O'Day. He also toured with Bob Hope entertaining the U.S. troops. Additionally, he recorded with Tommy Dorsey, Vic Schoen, Howard McGhee, Frances Faye, Betty Roche, Nelson Riddle, Paul Broadnax, Charles Mingus, and Ben Webster. In the 1960s, Trenner worked as a studio musician, and led "The Steve Allen Show" house band. He continued working in television throughout the 1970s and 80s. In the mid-1960s, Trenner was married to actress, voice actress and singer B.J. Ward, but they later divorced. Later he married Marycarmen Jones (m.1990 - 2005). They had a daughter, Sara Trenner. With Dave Pell With Betty Roché With Ben Webster       Brenda Boozer  Brenda Boozer (born January 25, 1948) is an American mezzo-soprano who has had an active international career performing in operas and concerts since the mid 1970s. She was a member of the Metropolitan Opera in New York City for 11 seasons. Born in Atlanta, Georgia, Boozer participated in beauty pageants in her youth and was crowned Miss Tallahassee in 1967. She received her bachelor's degree from Florida State University and completed graduate studies in vocal performance at the Juilliard School. At Juilliard she notably performed the role of Venus in a production of Jean-Philippe Rameau's rarely performed "Dardanus" with tenor John Aler in the title role in 1975. She also studied dance with Martha Graham and acting with Herbert Berghof in New York City.