Item details
| Designated Exempted Works item no. | 23 |
|---|---|
| Nature of works | Erection/Alteration/Removal of any external metal ventilation duct or associated supporting frame |
| Location of the external metal ventilation duct or associated supporting frame |
|
| Result in any additional load to any cantilevered slab | No |
| If the duct or frame projects from the external wall of a building, projection from the wall | Not more than 750mm |
| If the duct or frame is located on a balcony, verandah or canopy (other than a cantilevered slab) |
|
| If the duct or frame is hung underneath the soffit of a balcony, verandah or canopy (other than a cantilevered slab), the largest cross-sectional dimension of the duct or frame | Not more than 750mm |
| The distance between the highest point of the duct or frame and the roof or ground | Not more than 3m |
| For erection or alteration works-the balcony, verandah or canopy projects over any street or common part of the building. | No |
More details: See Item 23 Description of building works, Schedule 2 - Part 2, Building (Minor Works) Regulation