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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 173 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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Field-Scale Evaluation of the Water Quantity and Quality Benefits of Blue Roofs Compared to Green and Conventional Roofs.
North Carolina State University Theses Biological and Agricultural Engineering
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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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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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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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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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Hygrothermal performance of wood-framed, mineral-wool-insulated walls and roofs with low thermal transmittance
Low thermal transmittance of external walls and roofs supports sustainability and energy savings, but the improved insulation efficiency may increase moisture problems in these building components. As the performance of the highly insulated (HI) building envelope subjected solely to water vapour …
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