There are numerous designs of precast roofs.
Prestress concrete and green roof.
Precast concrete products do relate directly to four leed credits and a total of eight points.
It also saves time and cost.
Spancrete hollowcore precast concrete planks slabs are fire resistant.
Double tees may be used for many types of buildings.
In addition projects that use this system are increasingly green friendly when panels are fabricated from recycled steel and locally extracted materials.
This research studies the thermal performance of precast lightweight foamed concrete as a roof structure integrated with a green roof system through experimental modeling.
Double tees are the most widely used prestressed concrete product in the minimum span range.
The article discussed two prototypes.
Site credit 7.
Concept drawing of green roof structure.
Prototype i that had a clear span of 6 1 m 20 3 ft and a depth of 0 6 m 2 ft for a span to depth ratio of 10 and prototype ii that had a clear span of 18 4 m 60 8 ft and a depth of 2 6 m 8 5 ft for a span to depth.
Sydney zoo by misho associates.
There are many benefits of using the precast roofs for construction of homes and offices.
Green roofs for healthy cities grhc is developing a course on waterproofing and drainage as it relates to green roof design and implementation.
However only a few buildings have implemented a green roof system in the tropics especially in indonesia and the literature found on this subject is also inadequate.
The system allows for a substantial reduction in on site waste and optimized material usage.
Concrete roof systems have three basic advantages over competitive materials esthetic appeal structural economy and functional utility.
These precast roofs are usually constructed in a way that is energy efficient.
Precast concrete panels showcase a number of green and sustainable properties.
Prefabricated concrete panels will be used to create tunnels which will be landscaped on top.
The course will be launched at the fifth annual international greening rooftops for sustainable communities conference april 29 may 1 2007 in minneapolis.
Precast prestressed concrete trusses were introduced in 1978 in the aci journal article titled prestressed concrete trusses.
Site credit 6 stormwater management.
Steel beams or precast walls beams.
Precast pervious paving systems would likely need to be combined with additional measures like green roof assemblies or rain water harvesting to fully comply with this leed credit.