11.2.7 Differential movement
Buildings formed using closed panel systems shall account for differential movement between the frame wall and other building elements or supporting structures.
Where closed panel systems connect to surrounding construction and differential vertical movement is expected, consideration should be given to:
- accommodation of suitable movement joints in self-supporting and lightweight claddings
- the design of joint details and accommodation of differing floor levels at thresholds at staircases and lift shaft enclosures
- service entries, risers and fixed vertical external services
- design and provision of suitable weather resistant and durable joints
- interface of self-supporting cladding and cladding attached to the unit
- design of connection brackets, anchors, and ties to accommodate movement.
Where claddings are factory installed and supported by the panel, consideration should be given to interfaces with self-supporting cladding.
Closed panel timber frame
The design for differential movement in closed panel timber frame structures should be in accordance with Clause 6.2.8.
Structural insulated panels (SIPs)
SIPs not incorporating structural timber should be designed in accordance with the manufacturer’s recommendations. The design for differential movement in SIP structures incorporating structural timber should be in accordance with Clause 6.2.8.
Closed panel light steel frame
The design for differential movement in closed panel light steel frame structures should be in accordance with Clause 6.10.20.
Last updated: 2nd January 2025