If you look at the picture on the below link it will give you an example of the system and process just using different materials
http://www.doka.com/doka/en_global/products/floor/flex_124/pages/01739/index.php
I think the above responses thought you planned to use I beams for reinforcement, as opposed to a support system for you formwork deck.
Can you give me some more information on the I-beam?
Dimensions and weight per unit
But my first reaction is that steel I-beams would very heavy and...