The technical specifications of the external mesh fence or metal railing for validation and corresponding minor works items are listed in Part 4 of Schedule 3 of the Building (Minor Works) Regulation (B(MW)R). The works must be in existence or completed before 1 September 2020.
External mesh fence or metal railing on-grade
The prescribed building or building works item
8
Corresponding minor works item
2.7
- Height of the structure, including any feature at its top
≤ 5m - If the lower part of the structure is a solid fence wall, the height of the wall alone
≤ 2.5m - Not used as a protective barrier
External mesh fence or metal railing on a roof
The prescribed building or building works item
9
Corresponding minor works items
2.56
- Height of the structure, including any feature at its top
≤ 2.5m - If the lower part of the structure is a solid fence wall,
- Height of the wall alone
≤ 1.1m - Thickness of the wall
≤ 100mm - Density of the wall
≤ 650kg per m3 - Aggregate length of any additional wall per m2 of the roof area
≤ 0.3m
- Height of the wall alone
- Not used as a protective barrier
- Thickness of the roof slab supporting the structure
≥ 150mm - No additional load to any cantilevered slab
- Not involving alteration to any other structural elements
3.56
- Height of the structure, including any feature at its top
≤ 1.5m - If the lower part of the structure is a solid fence wall,
- Height of the wall alone
≤ 300mm - Thickness of the wall
≤ 100mm - Density of the wall
≤ 650kg per m3 - Aggregate length of any additional wall per m2 of the roof area
≤ 0.3m
- Height of the wall alone
- Not used as a protective barrier
- Thickness of the roof slab supporting the structure
≥ 150mm - No additional load to any cantilevered slab
- Not involving alteration to any other structural elements
External mesh fence or metal railing on top of a solid fence wall on-grade
The prescribed building or building works item
10
Corresponding minor works item
1.59
- Not located on an unauthorised solid fence wall
- The aggregate height of the wall and the fence or railing, including any feature at its top
≤ 10m - Height of the solid fence wall
≤ 2.5m
The prescribed building or building works item
11
Corresponding minor works item
2.57
- Not located on an unauthorised solid fence wall and a solid fence wall falling within the description of Designated Exempted Works item 5 that was erected, altered or repaired without the approval and consent of the Building Authority
- The aggregate height of the wall and the fence or railing, including any feature at its top
≤ 5m - Height of the solid fence wall
≤ 2.5m - Not used as a protective barrier