(FLL) Richlinien für die Planung, Ausführung and Plege von Dachbegrünung (Guideline for the Planning, Construction and Maintenance of Green Roof –Green Roofing Guideline: developed by the German Research Society for Landscape Development and Landscape Design), latest English Edition. Heavier intensive green roofs generally require a concrete supporting deck. “A combination of organic and inorganic matter than anchors plant roots, drains water from the roof, and sustains plant growth.” ([[References for green roofs|Green Roofs for Healthy Cities and the Cardinal Group, 2006) Growing medium characteristics that affect stormwater performance include the following. Check when there is evidence of a leak that needs to be located. Evaluate factors that affect roofing design, such as. Weight loadings are therefore likely to be an underestimate. The weight of all landscaping materials shall be considered as dead load and shall be computed on the basis of saturation of the soil as determined in accordance with Section 3.1.4 of ASCE 7. 5. An individual who has achieved a specific knowledge level regarding green roof design, project management, installation and maintenance through a. Snodgrass. In most applications a cushioning layer will be installed on top of the waterproofing or root-barrier to resist strains induced by point loads or puncture from sharp protections. ft. portland cement with no gypsum or fillers (heaviest scenario I would envision). For example, the weight per square footing for Asphalt Shingle weight per 100sq.ft (lbs.) Some projects will not need all these steps, some projects may need additional steps, and the order may need to be changed for some projects. Workmanship and proper construction sequencing are the factors mostly closely correlated to waterproofing success. Dunnett, N., and N. Kingsbury. Because many different green roof systems are often available that meet project goals, performance specifications (insert hyperlink to definition) can often result in more competitive pricing than descriptive specifications (insert hyperlink to definition), since performance specifications allow for more systems to meet the specifications than descriptive specifications. If leak detection is desired, ensure green roof system is designed to be compatible with leak detection, as leak detection of green roof assemblies that incorporate root-barriers is very challenging, if not impossible, in most instances. Gridirons over stages shall be designed to support a uniformly distributed live load of fifty psf in addition to the rigging loads indicated. Percent fines affects how quickly water moves through the growing medium. AWC's Appendix A lists a variety of live and dead load combinations for floors, ceilings and rafters. One important item to design for is an increased structural load. Designed by Gimmeblogs The second trussed roof is designed for a dead load of 160kg/m2 and a live load of 40kg/m2. A structural engineer’s advice is essential to ensure comprehensive design development, based on the building’s construction, condition and weight loading capacity. The primary reason for not providing design specifications is that each green roof is unique and needs to be designed considering the factors discussed in this article. specific stormwater management, such as reducing pollutant load or volume and rate control; specific uses, such as food production, gathering spaces; minimizing building energy usage for heating and cooling; marketing and branding as part of an overall green building strategy; and. Damage to a wall can arise from wind forces, plant load, cable tension, and human access. jQuery(document).ready(function(jQuery){jQuery.datepicker.setDefaults({"closeText":"Close","currentText":"Today","monthNames":["January","February","March","April","May","June","July","August","September","October","November","December"],"monthNamesShort":["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"],"nextText":"Next","prevText":"Previous","dayNames":["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"],"dayNamesShort":["Sun","Mon","Tue","Wed","Thu","Fri","Sat"],"dayNamesMin":["S","M","T","W","T","F","S"],"dateFormat":"MM d, yy","firstDay":1,"isRTL":false});}); Existing structure and size, access and nearby vegetation, Sourcing skills, expertise and information, Building rating schemes and planing assessment tools, Victorian Desalination Project Green Roof, Dead load – the final constructed weight of all built elements and all components associated with the roof or wall assembly, including plants, growing substrate and any water held in the system, Live load – the weight of people who will use the space, and of any mobile equipment that will be used periodically on the site, for example, maintenance (live load generally applies to green roofs, not facades or walls, however it would be appropriate on a vertical surface if a trafficable maintenance platform was built into the system), Transient load – moving, rolling or short-term loads, including wind and seismic activity. While some studies found no significant correlation between green roof slope and stormwater runoff (Bengtsson 2005; Mentens et al 2006), others found greater stormwater retention at lower roof slopes (e.g. ft. when used for storage only) Dead load of attic floor, not floored = 10 lbs. Comparison of most common extensive green roof planting methods Plants exposed to seasonal moisture variations may be more resilient. The owner is the ultimate authority on any project. Mid-range, 5-inch, systems weigh approximately 34 pounds per square foot and are compatible with wood or steel decks. Performance specifications typically include required physical and chemical properties of green roof components and the green roof system as a whole, as well as required performance goals. A landscape architect is a person licensed in the art of planning, designing and management of the built or natural environment. A root barrier prevents plant roots from damaging the waterproofing membrane. The values for dead loads in Table 3.2 are for commonly used materials and … It is therefore essential to ensure access to water will be available during the plant establishment period. Last Revised: 11/04/2014 Computing the unit dead load for a region of surface area generally starts by identifying the region of a roof plan, floor plan, or elevation where the unit load is needed then looking at a typical section of that area to see how it is constructed. For example, Appendix A indicates that one type of clay tile roof system has a live load value of 20 psf and a dead load value of 15 psf. Normal standard for floors - depends - deck floor - attic floor, primary living area - sleeping room - lots of choices. Fifty psf in addition to the North American market, City officials may not be with! Protects soil from erosion most commonly used leak detection systems allow for pinpointing the exact location of leaks can.... dead load, or cuttings, noise reduction estimates, and access! 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