Triple Bunk Staggered Beds

Build the two end pieces — one full height, one for the mid-bunk end. On the verticals, mark from the top down at 12-3/4", 25-1/2", and 38-1/4", plus 51" and 63-3/4" on the full-height vertical, with the last mark 7" from the bottom. These marks set every rail height, so measure them precisely.

Build the two inner cross sections — one full height, one hanging. Rails sit the same 12-3/4" apart as the ends. Each cross section has one rail installed flat, which becomes a mattress support.

Build the front and back double sections as mirror images of each other. Mark the full-height verticals from the top at 12-3/4", 25-1/2", 38-1/4", 51", and 63-3/4" (last mark 7" up), aligning to the end pieces' rails.

Build the front and back single/ladder sections, also mirror images. Mark the verticals at the same spacing as the double sections. On these, the main verticals sit on the outside of the rails so the ladder steps read cleanly.

Drill the connection bolt holes about 1" below each bed rail, plus one below the top safety rail. That places the nuts safely directly below the cross rails, away from sleepers — four bolts in each of the three full-height verticals, and so on per the plan.

Rather than screwing slats to the supports (which would kill the knockdown feature), fasten the slats to each other so they hold spacing as a liftable mat. Then bolt the panels together into the staggered frame. Do not omit the top safety rails — this bunk is tall.