Former Little Heath pupil Tymothy Davis, known as Tym, died in Royal Berkshire Hospital following the incident at 3.34am on Monday, January 4.
A memorial to dad-of-one Mr Davis, who grew up in Tilehurst, has been left in Oxford Road on the bridge over the IDR.
Flowers, a Chelsea Football Club scarf and a large piece of cardboard bearing signatures are at the scene.
The sign is headed: “RIP Tym Davis. Sadly took his life on Monday, 4th January 2010. A loving father, husband and friend. Missed by all.”
One tribute, believed to be from Mr Davis’ partner, said: “I forgive you and I will always love you.”
Mr Davis used to be a team leader at the NatWest call centre in Theale.
Jason Burton, who worked with Mr Davis at NatWest and lives in Spencers Wood, was close friends with him. He said: “I only spoke to him about three-and-a-half weeks ago. I miss him lots.
“He was a really nice bloke. He was really genuine and down to earth.
“He would always help any other people.
“I can’t believe this has happened. He was a good worker and a good friend.” Other tributes said: “Love you mate” and another said: “Always in my thoughts.” People who wish to make donations to armed forces charity Help for Heroes in Mr Davis’s memory can do so via AB Walker and Sons Ltd, 36 Eldon Road, Reading.