Item details
| Designated Exempted Works item no. | 22 |
|---|---|
| Nature of works | Erection/Alteration/Removal of any external metal ventilation duct, or associated supporting frame, on-grade or on a roof of a building |
| Result in any additional load to any cantilevered slab | No |
| The distance between the highest point of the duct or frame and the adjoining ground or adjoining roof | Not more than 900mm |
| If there is no protective barrier of a height of not less than 1.1 m at any edge of the roof, the distance between any part of the duct or frame and that edge | More than 1.5m |
More details: See Item 22 Description of building works, Schedule 2 - Part 2, Building (Minor Works) Regulation