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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 164 for “"Roofs"”.
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Waterproofing of roofs
… these have made possible a revolution in the way roofs are designed and built. Good roofing design and practice involves proper selection of materials as well as a proper understanding of the current roof techniques. It is very important to have a sound knowledge of the inherent properties of the …
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Current technologies and trends of retractable roofs
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2003.
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Wind pressure coefficients for gable roofs of intermediate slopes
… Code of Canada for design wind loads on gable roofs of intermediate roof angles (10$\sp\circ$-30$\sp\circ$). The study is initiated by the discrepancies found in recent research projects against the current design wind loading provisions for such roofs. Five building models with roof angles of …
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Simulation of fluctuating wind pressures on low building roofs
Wind pressure fluctuations acting on low building roofs are important for the prediction of peak pressure values and for fatigue design purposes. Collection of several time histories of pressure fluctuations, using traditional wind tunnel measurements is time consuming and expensive. Within this …
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Reliability analysis of green roofs under different storm scenarios
… treat runoff at its source. In particular, green roofs can promise multiple benefits in terms of runoff reduction, air quality improvement, and mitigation of the urban heat island effect, while taking up little additional land. However, few consistent standards exist to help designers and planners …
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Design of Stick-Framed Wood Roofs Under Extreme Wind Loads
… industry inCanada and the United States. The roofs of these houses can be constructed eitherentirely on site or using prefabricated trusses. Assembling the roof structure on site,otherwise known as stick-framing, is a framing technique with current code guidelinesthat are based on past …
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Heat transmission through farm building metal roofs under summer conditions
Thesis (M.S.)--Michigan State University. Dept. of Agricultural Engineering, 1971
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Infiltration Models for Engineered Media in Living Roofs and Bioretention
Engineered media used in living roofs and bioretention plays a crucial role in determining stormwater treatment performance and sustaining plant growth. This research focuses on (1) the hydraulic properties and pore size distributions of engineered media with varying aggregates, compost ratios, and …
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Stability assessment of entry roofs in underlying multiple seam mines
Entry roofs in underlying multiple seam mines are vulnerable to failure under the influence of stress transferred from the upper seam workings. Overburden depth, innerburden thickness, percentage of hard rock in the innerburden and relative location of pillars in the two seams are some of the …
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Cool Roofs for improving thermal performance of existing EU office buildings
… day during night. Despite the concept of cool roofs - i.e. the application of cool materials to roof surfaces - is well known in US since 1990s, many studies focused on their performance in both residential and commercial sectors under various climatic conditions for US countries, while only a …
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Nutrient Dynamics in Stormwater Runoff from Green Roofs with Varying Substrate
… development. Fifteen mock, extensive green roofs were built in the fall of 2008 at the Watershed Research and Education Center in Fayetteville, Arkansas. The goals of this project were to (1) measure the amount of stormwater runoff from varying treatments and control roofs, (2) measure the …
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Analysis of Cylindrical Shell Roofs by Use of Energy Principles and Finite Differences
Made available in DSpace on 2014-12-05T17:37:38Z (GMT). No. of bitstreams: 1 6303219.pdf: 4692888 bytes, checksum: 02509f5adbd0149f4e1c8231dd51bc01 (MD5) Previous issue date: 1962
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Design and Implementation of a Pressure-Equalizing Vent System for Low-Slope Roofs
… sometimes with disastrous results. Low-slope roofs are subjected to potentially high levels of suction pressure, especially when winds strike the corner of a building, creating vortices. Traditional methods of attaching roof membranes to substrates are prone to failure when the low pressure on …
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Theoretical analysis of bump and airblast events associated with coal mining under strong roofs
… with delayed caving of competent longwall roofs. The roofs were modeled as elastic beams on continuous elastic foundations subject to exponentially distributed abutment stress. Elastic beam theory was applied to develop analytical solutions for deflection of single-layer roof models. …
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Estimation of Required Restraint Forces in Z-Purlin Supported, Sloped Roofs Under Gravity Loads
… developed using elastic stiffness models of flat roofs and were verified by experimental testing. The provisions need refinement, because the treatment of roof slope and system effects is incorrect. Also, the current design provisions are based upon an assumed panel stiffness value, ignoring the …
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Exploring the response of urban storm sewer system to the implementation of green roofs
… urban watersheds has become a hot topic. Green roofs, which have been reported as an effective means of reducing urban storm water runoff, have been widely used in Europe and are gaining increasing attention in the US. This thesis presents a method to study the changes of urban catchment runoff …
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Study to analyze the viability of rainwater catchment from roofs for its reuse in Tegucigalpa, Honduras
… to be much larger, precipitation more abundant, roofs would have to have a bigger area and tanks be cheaper for it to be the sole source of water supply in the city. However, though maybe not ideal, it may be used as complementary to current public and private supply systems; it can reduce water …
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Green Roofs in the Garden City: Exploring the Opportunities for Green Roof Policies in Missoula, Montana
… discussion of its history and the benefits green roofs offer to building owners and communities. It explores three obstacles to widespread green roof adoption. It introduces the six main green roof policy tools identified through research, and presents eight case examples of cities with green roof …
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