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Articles 1 - 9 of 9
Full-Text Articles in Environmental Design
Culvert Material Cost Comparison, New England Environmental Finance Center
Culvert Material Cost Comparison, New England Environmental Finance Center
Water
The following tables provide a detailed look at the role that culvert material and culvert diameter play in the overall cost of a culvert replacement project.
Culvert Material Cost Comparison, New England Environmental Finance Center
Culvert Material Cost Comparison, New England Environmental Finance Center
Economics and Finance
The following tables provide a detailed look at the role that culvert material and culvert diameter play in the overall cost of a culvert replacement project. Table 1 displays the cost per foot purchase price arranged by diameter size for the various culvert materials that are currently available. Table 2 displays the average additional culvert pipe material cost (increased cost to upsize minus original in-kind replacement cost) that would be incurred when upsizing a given diameter of culvert with a 50 foot length by factors of: 200%, 250% and 300%.
Top Tips For Domestic Refurbishment, Joseph Little
Top Tips For Domestic Refurbishment, Joseph Little
Articles
1) It stands to reason that insulating a wall should not affect its strength or longevity, nor should it result in a buildup of moisture (inter-stitial condensation) or mould. However the Industry is currently gripped with a desire to insulate to the highest standard (U-value) at the lowest financial cost, as quickly as possible, with little thought of these issues. An appropriate, robust solution must take the original wall, the occupant’s health, the room’s function and even the building’s location into account.
Construction Cost Models, Barry Dikeman
Construction Cost Models, Barry Dikeman
Economics and Finance
The following are a series of cost estimate models similar in format to a typical engineer’s estimate that were developed in support of our financial impact assessment report for LD 1725. The models us current material costs, labor costs, and equipment costs for the region to provide a comparative cost analysis of seven culvert replacement scenarios. The models provide information about what the cost impact of LD 1725 would be for typical culvert replacements in Maine. However, due to the inherent restrictions of the cost modeling framework we were not able to include the abundance of variables that would be …
Breaking The Mould 5 : Comparative Simulation Of Internal Insulation Systems, Joseph Little
Breaking The Mould 5 : Comparative Simulation Of Internal Insulation Systems, Joseph Little
Articles
In the last edition of Construct Ireland ‘Breaking the Mould IV’ established the standard that should be used to evaluate thermal upgrades of single leaf walls, described steps to physically prepare the wall, explained some of the mechanisms that affect the likelihood of mould and gave criteria for judging the simulations outputs. The next step is to simulate a number of permutations of typical internal insulation systems using WUFI Pro under IS EN 15026.
Building America Research Benchmark Definition: Updated December 2009, R. Hendron, C. Engebrecht
Building America Research Benchmark Definition: Updated December 2009, R. Hendron, C. Engebrecht
Publications (SD)
To track progress toward aggressive multi-year, whole-house energy savings goals of 40%–70% and on-site power production of up to 30%, the U.S. Department of Energy (DOE) Residential Buildings Program and the National Renewable Energy Laboratory (NREL) developed the Building America (BA) Research Benchmark in consultation with the Building America industry teams. The Benchmark is generally consistent with mid-1990s standard practice, as reflected in the Home Energy Rating System (HERS) Technical Guidelines (RESNET 2002), with additional definitions that allow the analyst to evaluate all residential end uses, an extension of the traditional HERS rating approach that focuses on space conditioning and …
Active Noise Barrier Minimizing Pressure Gradient, Carl Hart, Siu-Kit Lau
Active Noise Barrier Minimizing Pressure Gradient, Carl Hart, Siu-Kit Lau
Durham School of Architectural Engineering and Construction: Faculty Publications
Minimization of the sound pressure field within the shadow zone of a noise barrier is achieved by reducing the pressure gradient along a line, at the top of a barrier, via active noise control. The noise control effectiveness of a barrier is increased by this strategy, especially for specific system configurations. The proposed method was evaluated by numerical simulation. Results indicate that system orientation has little effect on minimizing the pressure gradient at the top of the barrier when the error sensors are invisible to the primary noise disturbance. Highly effective control within the shadow zone and close to the …
Noise Propagation Through Open Windows Of Finite Depth Into An Enclosure, Caleb Sieck, Siu-Kit Lau
Noise Propagation Through Open Windows Of Finite Depth Into An Enclosure, Caleb Sieck, Siu-Kit Lau
Durham School of Architectural Engineering and Construction: Faculty Publications
Predicting the insertion loss of an opening backed with an enclosed space is important for building noise control. Recent research in sound transmission through apertures of finite depth in infinite rigid baffles has included the effects of propagating and evanescent modes within the aperture in order to extend models to higher frequencies. The present study extends the model to the case of the aperture backed by a cavity as opposed to sound radiating into half-space. The role of coupling between the aperture modes, radiation modes, and cavity modes in the transmission was investigated. The results were compared to those of …
Leadership, Libraries, Leed For The Future, Kathryn S. Ames, Greg Heid
Leadership, Libraries, Leed For The Future, Kathryn S. Ames, Greg Heid
Georgia Library Quarterly
The article discusses the use of Leadership in Energy and Environmental Design (LEED) principles in the design of the modern public library. It is stated that an LEED-certified library will have lower costs in energy, systems replacement and maintenance through the use of light-emitting diode (LED) lighting and efficient heating and air conditioning, but that due to special materials, the up-front expense is higher. The inspection of the facility throughout its construction is also noted.