I do not have the information you want, but I urge you to read the following thread before you loft them.
Some students who have fallen out of lofted beds that didn’t have guard rails have died or been severely injured.
If (when) you loft your beds, be sure to install whatever guard rails your college provides.
Read: http://talk.collegeconfidential.com/college-life/1909939-bunk-and-loft-beds.html