Major Assignment- Hollow Core Research Update 1

I looked a little into hollow core products at http://www.hollowcore.com.au/and would like to use hollow core slabs for the floors in the office block on the first floor. I would like to use the product for the walls as well.
For the first floor of the office, I will need to use hollow core that spans over 15m. Below is a drawing of the 400 thick slab that will be used.