What is a ceiling hanger?
A ceiling hanger is the component that suspends the carrying channel of a suspended ceiling from the floor or roof structure above. It sets the drop height, carries the weight of channels, boards and light fittings, and — chosen correctly — is where structure-borne sound from the floor above is interrupted.
Types
- Nonius hanger. An upper and lower part with toothed edges locked together by a safety pin. The advantage is that the ceiling can still be adjusted precisely in height after installation. Widely used on larger ceilings.
- Quick hanger with threaded rod. A rod fixed to the soffit with a spring clip that slides when squeezed. Fast, and suitable for large drops.
- Direct fixing bracket. A perforated bracket screwed straight to the soffit and clipped to the channel; intended for shallow drops of a few centimetres.
- Acoustic or resilient hanger. Contains a spring element that acoustically decouples the ceiling from the floor. This is the version you need when sound insulation is the goal.
- Hangers for timber joists, for fixing to a joisted floor rather than concrete.
Spacings and loading
Centre-to-centre spacings always follow the manufacturer’s system data, because they depend on the channel, board thickness and weight of the finish. As an order of magnitude, a single-layer boarded ceiling uses hangers roughly 0.8 to 1.0 metres apart along the carrying channel, with the channels beneath at 300 to 500 mm centres. As soon as a second layer of board, acoustic panels or heavy fittings are added, spacings must reduce.
Practical tips
- Never hang light fittings, projection screens or services from the ceiling channels. They need their own suspension from the structure. A ceiling system is sized for its own weight plus a limited allowance.
- Fix into sound material. Hollow floor units, aerated concrete and the voids between cores of a hollow-core slab all need different anchors from solid concrete. Ask the anchor supplier for the right application per substrate.
- For sound: resilient hangers and a free perimeter. Resilient suspension only works if the ceiling makes no rigid contact anywhere: leave a perimeter gap, seal it with flexible sealant, and do not run the boarding tight against the masonry.
- Work to a line, not piece by piece. Set a string line or laser line at the required height first, then adjust every hanger to it; levelling afterwards costs far more time.
- Allow for deflection above. With timber joisted floors a rigidly suspended ceiling moves with the floor and cracks; choose a suspension that tolerates some movement.
Related terms
- Nonius hanger
- Suspended ceiling
- Metal framing
- Plasterboard
- Structure-borne sound
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