A partition deflection head is a crucial component used in construction, specifically within plasterboard partitions, designed to accommodate structural movement occurring above the partition.
Understanding Deflection Heads
Deflection heads serve a vital function by allowing a partition to remain stable while the structure it connects to moves. This movement, known as deflection, is a natural response of building elements like floors or roofs to various forces.
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Deflection heads are used within plasterboard partitions when needing to allow for movement (up, down or both) within the structure at the head of a partition. This movement (or deflection) is created by live and dead loads on the floor or roof above.
Why are Deflection Heads Necessary?
Buildings are subject to loads, including:
- Dead Loads: The weight of the building materials themselves (e.g., walls, floors, roofs).
- Live Loads: Temporary loads from occupants, furniture, snow, wind, etc.
These loads cause structural elements like floor slabs or roof beams to bend or deflect slightly. If a rigid partition is built tightly against a flexing structure above it, the movement could lead to:
- Cracking in the partition walls (especially plasterboard).
- Damage to finishes.
- Potential structural issues over time.
A deflection head provides a flexible connection, preventing these problems by creating a gap or mechanism that absorbs the vertical movement.
How Do They Work?
Deflection heads typically consist of specialized track or channel profiles installed at the top of the partition frame. These profiles are designed to allow the vertical studs of the partition to move within the head track, either downwards as the structure above deflects or upwards if it settles back slightly.
Key aspects include:
- Accommodating Vertical Movement: They specifically address movement in the vertical direction (up or down).
- Used at the "Head": Positioned at the top of the partition where it meets the floor or roof structure above.
- Common in Plasterboard Partitions: Frequently used with drywall systems due to the material's susceptibility to cracking from movement.
In essence, a partition deflection head acts as a buffer, ensuring the integrity and appearance of the partition wall are maintained despite the dynamic nature of the main building structure above.
