Metal free* solid wood bed slats (beech wood) that carry any mattress with decent breathability.
The lateral frame has a height of 4cm. It contains 23 bars (each measuring 5cm x 2cm) with gaps of about 3.8cm inbetween at a length of 1.95m. From a width of 120cm, the slat thickness is 5cm x 2cm. Frames are always 4-8cm shorter and around 1cm narrower than the nominal dimensions so that they can fit into any bed.
This frame can - as opposed to the roll-up slats - also be used in beds without slatted frame support. It reduces the inlay depth of the bed by 4cm / 8cm.
Width 140cm will generally be made with a length support strip for having a stable base also for two persons (* this brace is currently secured with screws). The pillar in the middle has to be cut to right height or taken away if one person use.