Loft Bed Diy Plan . This castle loft bed is made using 2x4s and 2x6s, consistently! This plan is really impressive, and it uses basic framing and structural pipe fittings as the support structure. Twin Loft Bed Plans BED PLANS DIY & BLUEPRINTS from bedplandiy.com Tools and materials to build this simple loft bed. (i didn't glue it) in case you could feel it under the mattress and needed. Bibliophiles of any kind can appreciate sleeping in a castle made of books, which is exactly what this stylish loft bed in brooklyn has going on.