Agriculture Reference
In-Depth Information
Table 4.3 Basic design checklist
Design element
Book sections
1.
Assess site suitability
3.3
Structural capacity
3.3.1
Safety issues
4.6.2, 4.9
Access for construction/installation and long-term maintenance
4.9
Location and number of protrusions and perforations
4.6.3
Other conditions: e.g., slope, mechanical services, exposure
4.6, 4.9
2.
Determine and prioritize design objectives on conjunction with project team
3.2
Primary objective: rainfall retention
Chapter 2
(provides
background)
Secondary objective: establish and maintain dense plant cover
4.3, 4.4
Tertiary objective(s): e.g., visual amenity, glare reduction, biodiversity, energy demand mitigation, water
harvesting, visibility
1.2, 1.3, 4.6,
4.9, 4.11
3.
Determine substrate composition and characteristics (esp. PAW and weight) based on available materials
4.1
4.
Determine minimum inal substrate depth
Apply Equations relating DSD , PAW , and D LR
4.1.3
Verify loadings with structural engineer
4.1.2
If additional structural capacity is available, increase substrate depth max 100-150mm to enhance plant
viability and long-term health.
If minimum substrate depth across roof cannot be met:
Revise substrate composition
4.1
Provide supplemental moisture storage techniques
4.2
Provide permanent irrigation system operated according to substrate moisture content/plant needs
4.8
Reduce individual plant competition for water
4.3, 4.4
Consider (last resort) an alternative retention objective (smaller storm, less retention credit), potentially in
combination with ground-level stormwater controls. Communicate changes to horticultural consultant.
5.
Create planting design in conjunction with or by horticultural consultant
Select a variety of plant species based on site conditions, substrate characteristics and depth, and likely
presence/absence of irrigation; coordinate visual outcomes with architectural designer
3.4, 4.4
Identify method(s) of plant establishment, and installation density (if applicable)
3.4
Establish likely maintenance requirements (activities and frequency) during establishment and once full cover
is achieved.
4.4
Establish plant parameters for defects liability/project sign-off
3.2
Design supplemental moisture system(s), if needed, as determined through consultation.
4.2, 4.8
Establish terms of maintenance contract
3.2, 3.4
6.
Select waterprooing system and leak detection testing regime
1.4
7.
Design roof drainage
Coordinate horizontal drainage design with vertical drainage design to comply with all relevant building codes
(may require consultation with architect or structural engineer)
3.3.2
Verify horizontal drainage layer can withstand imposed loads and carry anticipated low without ponding
within the substrate
4.5
Coordinate design and materials' selection with regard to aesthetic appearance on façade and rooftop
4.6.3
8.
Select root barrier
1.4
9.
Identify permeable edging materials for living roof perimeter and around any protrusions or perforations
3.3, 4.6
Coordinate aesthetic/visual impact with architectural designer
10.
Consider and coordinate additional architectural aspects
Visibility
4.6, 4.7, 4.9,
4.11, 4.12
Accessibility
Landscape features, if any
11.
Provide additional safety elements (for people and vegetation)
Secure access and safe working environment for maintenance of living roof and other building services
4.6.2, 4.9
Public gatherings (if/where needed)
4.11
12.
Perform regulatory compliance calculations for stormwater mitigation objectives.
Assumes substrate design meets minimum requirements from 3 and 4 of this list
3.5, 4.7
Design monitoring elements, if needed
4.10
13.
Final checks
Substrate depth meets or exceeds minimum requirements for rainfall retention
Protocols established for ensuring waterprooing membrane and vegetation protection for anyone accessing
the living roof
Plant species list, installation method and maintenance plan feasibility veriied by horticultural consultant
System weight (all components) within allowable loading veriied by structural engineer
Architectural objectives achieved
Overall review for safety for anyone accessing the roof
14.
Client approval presentation
 
Search WWH ::




Custom Search