Concrete inFocus - Spring 2017 - 27

Case Study: The Ricchi, San Antonio, TX
The Ricchi condominiums in San Antonio are a contemporary,
mid-rise building consisting of 87 luxury condominiums. This exclusive development was the first of its kind to be built in the area. The
developers wanted to provide a first-class, secure and quiet building
and chose ICF as part of the plan to achieve their goal. Noise reduction was a major consideration for this project. The Ricchi is located
directly below the flight path for airliners approaching San Antonio's
international airport and is adjacent to a US Army training camp.
The sound attenuation offered by ICFs provided a solution to those
concerns while creating significant energy savings. The U-shaped,
luxury condo utilized more than a quarter-million square feet of ICFs.
The higher insulation provided by the ICF walls reduced HVAC tonnage by 20 percent, resulting in significant energy savings.

include reinforced concrete with a minimum compressive strength of
2,900 psi and 1/2-inch gypsum wall board on each side.
In addition to fire resistance rating of wall assemblies, it is important
to understand the behavior of the EPS under fire conditions. The EPS
used for ICFs is manufactured with flame retardants that render the
EPS insulation completely unable to support a flame without an outside flame source; it is approximately five times better than wood at
stopping flame spread from materials burning in close proximity. That
means an extra margin of safety for occupants and first responders.
EPS used for ICFs is strictly required to have a flame spread index of
less than 25 and smoke developed rating of less than 450 when tested
in accordance with ASTM E84 & ANSI/UL 723. ICF companies that
maintain national evaluation reports from ICC-ES or other accredited
testing agencies have all conducted a long list of materials tests in order
to comply with national safety standards.

Case Study: Hilton Garden Inn, Lewisville, TX
With the objective of keeping their guests safe, secure and comfortable, Hilton Garden Inn in Lewisville, TX, chose ICF construction for
its six-story hotel and 25,000-square-foot convention center. Eight-inch
ICF walls were used on the first two levels and 6-inch ICF walls were
used for the top four levels. Precast hollow core concrete planks were
used for the floors. The result is a fire resistant concrete building with
the added benefits of energy efficiency, durability, and peace and quiet.

Hilton Garden Inn and Convention Center,
Lewisville, TX. Photo courtesy of Nudura®.

The Ricchi Condominiums, San Antonio, TX.
Photo courtesy of Ricchi Group.

Energy Efficiency
According to a new report from the Institute for Market Transformation
(IMT), increasing the energy efficiency of America's multifamily buildings - nearly 18.5 million households - could save building owners and
managers, residents, governments, energy efficiency service providers
and financiers close to $3.4 billion annually. With these growing energy
concerns, building with ICFs is simply the smart choice. The secret lies in
the combination of reduced conduction and convection, and high thermal
mass. The result is a building with a lower appetite for energy and vastly
improved comfort inside the building due to more consistent temperatures
and lack of drafts. A more energy efficient envelope means more money
saved on a yearly basis while reducing the project's carbon footprint.
ICF walls are considered by the IECC and ASHRAE 90.1 as mass
walls with continuous insulation. Typical whole wall ICF assemblies
have an R-value between R-24 and R-26, depending on the exterior and
interior finish materials compared to R-11 and R-19 for 2x4 and 2x6
wood frame. Thermal resistance (R-value) does not take into account
the effects of thermal mass and by itself does not fully describe the
beneficial properties of ICFs. The damping and lag effect of thermal
mass means fewer spikes in heating and cooling requirements since the
mass buffers indoor temperature fluctuations, contributing to occupant comfort. Thermal mass shifts energy demand to off-peak time
periods when utility rates are lower, reducing costs further. ICF walls
can exceed the requirements for all climates zones for both residential
and commercial thermal envelopes above and below grade because of
the combination of extreme R-value and thermal mass.
Achieving a high performance building envelope also means minimizing air leakage and ICF walls are tighter than wood-frame or light gauge
steel walls. In tests, they averaged about half as much air infiltration as
wood frame. In many cases, the air infiltration rates are as low as 0.5 air
changes per hour. Thermal bridging is also eliminated with ICF walls
when compared to wood and light gauge steel. Since energy consumption of ICF buildings is lower, the HVAC systems can be smaller and
more efficient, adding to energy savings. The result is energy savings
ranging from 20 percent to as much as 50 percent depending on other
energy efficiency strategies employed for the building.
■
Full article can be viewed in the online-only version of the publication,
always available at www.naylornetwork.com/nrc-nxt.

concrete INFOCUS

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http://www.naylornetwork.com/nrc-nxt

Table of Contents for the Digital Edition of Concrete inFocus - Spring 2017

From the President’s Desk
Corporate Suite Column
Enviroscene Column
Strong and Efficient: Insulating Concrete Forms for Multifamily Residential Construction
Cut the Cost of Workers’ Compensation Insurance in the Concrete Industry
Engineering: Specifications for Concrete Construction
Predicting the Potential for Plastic Shrinkage Cracks
2017 Product Preview
Index of Advertisers
Concrete inFocus - Spring 2017 - belly1
Concrete inFocus - Spring 2017 - belly2
Concrete inFocus - Spring 2017 - cover1
Concrete inFocus - Spring 2017 - cover2
Concrete inFocus - Spring 2017 - 3
Concrete inFocus - Spring 2017 - 4
Concrete inFocus - Spring 2017 - 5
Concrete inFocus - Spring 2017 - 6
Concrete inFocus - Spring 2017 - 7
Concrete inFocus - Spring 2017 - 8
Concrete inFocus - Spring 2017 - 9
Concrete inFocus - Spring 2017 - 10
Concrete inFocus - Spring 2017 - From the President’s Desk
Concrete inFocus - Spring 2017 - 12
Concrete inFocus - Spring 2017 - Corporate Suite Column
Concrete inFocus - Spring 2017 - 14
Concrete inFocus - Spring 2017 - 15
Concrete inFocus - Spring 2017 - Enviroscene Column
Concrete inFocus - Spring 2017 - 17
Concrete inFocus - Spring 2017 - Strong and Efficient: Insulating Concrete Forms for Multifamily Residential Construction
Concrete inFocus - Spring 2017 - 19
Concrete inFocus - Spring 2017 - 20
Concrete inFocus - Spring 2017 - 21
Concrete inFocus - Spring 2017 - 22
Concrete inFocus - Spring 2017 - 23
Concrete inFocus - Spring 2017 - 24
Concrete inFocus - Spring 2017 - 25
Concrete inFocus - Spring 2017 - 26
Concrete inFocus - Spring 2017 - 27
Concrete inFocus - Spring 2017 - 28
Concrete inFocus - Spring 2017 - 29
Concrete inFocus - Spring 2017 - 30
Concrete inFocus - Spring 2017 - Cut the Cost of Workers’ Compensation Insurance in the Concrete Industry
Concrete inFocus - Spring 2017 - 32
Concrete inFocus - Spring 2017 - 33
Concrete inFocus - Spring 2017 - 34
Concrete inFocus - Spring 2017 - 35
Concrete inFocus - Spring 2017 - 36
Concrete inFocus - Spring 2017 - Engineering: Specifications for Concrete Construction
Concrete inFocus - Spring 2017 - 38
Concrete inFocus - Spring 2017 - 39
Concrete inFocus - Spring 2017 - 40
Concrete inFocus - Spring 2017 - Predicting the Potential for Plastic Shrinkage Cracks
Concrete inFocus - Spring 2017 - 42
Concrete inFocus - Spring 2017 - 43
Concrete inFocus - Spring 2017 - 44
Concrete inFocus - Spring 2017 - 45
Concrete inFocus - Spring 2017 - 2017 Product Preview
Concrete inFocus - Spring 2017 - 47
Concrete inFocus - Spring 2017 - 48
Concrete inFocus - Spring 2017 - 49
Concrete inFocus - Spring 2017 - 50
Concrete inFocus - Spring 2017 - 51
Concrete inFocus - Spring 2017 - 52
Concrete inFocus - Spring 2017 - 53
Concrete inFocus - Spring 2017 - Index of Advertisers
Concrete inFocus - Spring 2017 - cover3
Concrete inFocus - Spring 2017 - cover4
Concrete inFocus - Spring 2017 - divider1
Concrete inFocus - Spring 2017 - divider2
Concrete inFocus - Spring 2017 - 57
Concrete inFocus - Spring 2017 - 58
Concrete inFocus - Spring 2017 - 59
Concrete inFocus - Spring 2017 - 60
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