I want to use an I-beam as a means of lifting things in the workshop that I am building. I want to support one side from an exterior wall and the other end will be supported by a vertical steel beam in the center of the shop. The max weight the I-beam will ever see would be between 500lbs. and 1000lbs. The lenght of the I-beam will be 15`ft. My question is what size I-beam should I use? and dose my plan to support the I-beam ends sound like adeqate? Please Help.