Post Tensioned Concrete and LEED (part 2)

BUILDING WEIGHT

As described in a previous blog, unbonded post-tensioned concrete can reduce vertical construction elements.  Simply put, the less material used means less building weight (dead load).  The reduced weight can allow for smaller foundations and shear walls.  This can minimize excavation requirements, the need for caissons and possibility of affecting the water table.

With a reduced building weight due to unbonded post-tensioned concrete, there is potential savings for the following:

Construction

1. Concrete Footings/Foundations/Caissons
2. Concrete Shear walls
3. Excavation
4. Retaining Walls
5. Pumping of water for underground work

Operational Life-Cycle Savings

1. The impact (erosion) of building weight will be less the on surrounding land.
2. The cost of pumping of water to control sub-terrain flooding can be reduced.
3. Improved Seismic behavior.
4. Reduced deflection and vibration.

(On an aside, I found two interesting blogs that discuss the LEED program at http://www.reallifeleed.com/ andhttp://leedblogger.com/)

Post Tensioned Concrete and LEED (part 1)

Post Tensioned Concrete and LEED (part 3)

– Neel Khosa, AMSYSCO

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