Mid Century Platform Bed Frame.
Screw the slat into place using a wooden screw per beam. You can use the narrow edge of a spare lamella to ensure even spacing. Screw it in place as you did the first.

Bedroom Furniture Storage

Canopy Bedroom Furniture

Delightful Mid Century Platform Bed

Easy Bedroom Furniture

Low Bedroom Furniture

Solid Mid Century Platform Bed

Unusual Mid Century Platform Bed

Wooden Mid Century Platform Bed