Internal engineering test · Method: Internal family-bed protocol

Adult Adjacent-Load Test

Scheduled — no results yetCS-TST-003

Product revision: CS-MATTRESS-2026-08-A

Internal engineering test — not an EN, ASTM, CPSC or medical certification.

What are we testing?

What happens to the neighbouring sleeping surface when a 70, 90 or 120 kg adult load is applied?

Why this test matters

An adult can create local compression, slope and roll-together tendency near a smaller sleeper.
The Danish Health Authority specifically notes a heavier adult can create a depression an infant may roll towards.
No crib-mattress standard evaluates adjacent adult loading on a shared surface.

Method basis

Co-sleeping.com internal family-bed protocol. This test does not simulate an infant and establishes no medical risk threshold — it measures the mattress system. Loads are distributed through a documented body-load fixture (shoulder/pelvis/thigh pads), never one concentrated metal mass.

Planned procedure (draft protocol)

1Establish a datum line outside the deformed zone.
2Apply the distributed adult load at the defined position.
3Measure surface height at 0 / 50 / 100 / 150 / 200 / 300 / 400 mm from the load edge.
4Read unloaded, after 10 s and 60 s loaded, and 10 s / 60 s after unloading.
5Repeat at module centre, adjacent to and across a junction, in both firmness orientations.

Loads / conditions

70 kg distributed
90 kg distributed
120 kg distributed

What will be recorded

Vertical drop relative to unloaded surface
Local gradient/slope between measurement points
Topper displacement
Underlying module separation
Recovery percentage

Result

Scheduled

This test has not been run yet under the current documentation protocol. No result is published until a dated, signed internal test record exists for the stated product revision.