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Showing 1 to 20 of 23 for “"Roof system"”.
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Standing seam roof system strength under uplift loading
… Z-purlin supported, standing seam metal building roof systems. To achieve this end, eight sets of full-scale roof system tests were conducted. Each test set consisted of a single span base test and a three-span, multi-purlin line, confirming test. The base test method for uplift loading, in its …
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The design of a panelized roof system for residential construction
… is the composite building panel, used for walls, roofs and floors. Presently the types of composite panels used in residential construction include pre-framed walls of standard construction and, more innovatively, structural foam core panels with wood or wood composite faces. This thesis focuses …
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A panelized roof system for residential construction : development, application, and evaluation
… Program at M.I.T. has proposed a panelized roof system for residential construction. Although the system had been 'developed conceptually and even applied to a proof-of-concept structure prior to the involvement of this author, much of the detailed analysis and investigation had been left …
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Research on Environmental Performance-oriented Evaluation Method of Indoor Arena Roof System
… interface for large-scale public buildings, the roof system of indoor arenas embodies the complexity of performance-oriented design and evaluation. This study aims to address the core issue of scientifically and effectively evaluating the roof systems of indoor arenas in performance-oriented …
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SEARCHING FOR THE FACTOR OF SAFETY: A STUDY OF WOOD ROOF SYSTEM CAPACITY AS IT APPLIES TO SOLAR PHOTOVOLTAIC INSTALLATION
… install residential installation of photovoltaic roof systems has generated the need to re-examine the structural capacity of residential structures. Currently, a perspective exists that residential wood roofs may not be able to carry the additional load of a photovoltaic (PV) array. This research …
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Analysis of Anchors and Bracing Configurations for Personal Fall Arrest Systems in Residential Construction
… was to measure the behavior of a five truss roof system with various anchor points and bracing configurations loaded by a horizontal force. A lab built roof system was used to test three different anchor types with three forms of temporary bracing. The materials and methodology used in this …
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Advances in the operating condition design analysis of air based photovoltaic thermal solar roof systems
Air based photovoltaic thermal (PV/T) solar systems combine the technologies of electricity generating PV cells and active solar energy to supplement the electricity and heating loads of buildings and potentially reduce energy consumption. There has been a significant amount of research on these …
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Structural performance of spoke wheel roof systems
A spoke wheel roof system consists of tension rings, compression rings, and radial spokes and resists loads mainly through axial forces. Due to its light weight and ability to achieve a column-free, long span, it has been a popular solution to structures such as stadia since its first use in 1960s. …
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Further Study of the Gravity Loading Base Test Method
… strength of gravity loaded standing seam metal roof systems is the "Base Test Method". The Base Test Method provides a means for determining the positive moment strength of a multiple span, multiple purlin line standing seam roof system using the results from a set of six single span, simply …
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Development of Prediction Methods for the Lateral Anchorage Requirements in Metal Building Roof Systems
Metal building roof systems with C- or Z-section purlins require restraint to resist lateral forces developed within the roof system under gravity loads. The currently available procedures for predicting these forces have been shown to be inaccurate for sloped roofs and difficult to apply to roof …
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Prediction of Lateral Restraint Forces in Sloped Z-section Supported Roof Systems Using the Component Stiffness Method
… used as secondary members in metal building roof systems. Lateral restraints are required to maintain the stability of a Z-section roof system and provide resistance to the lateral forces generated by the slope of the roof and the effects due to the rotation of the principal axes of the …
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Uplift loaded standing seam roof systems
… the failure of an uplift-loaded standing seam roof system. Four sets of full-scale tests were conducted and their results were analyzed along with previous results (Anderson 1991). It was found that by normalizing the data, a reduction factor could be established for each test set …
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Lateral Restraint Brace Forces in Quarter Point and Third Point Plus Support Braced Z-Purlin Supported Roof Systems Subject to Gravity Load
… forces in two commonly used Z-purlin supported roof systems. These are quarter point bracing and third point plus support bracing. To that end, a stiffness model used in the past has been reintroduced. This model has been modified slightly to better represent roof system behavior. The updated …
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Computational and Experimental Study on the Behavior of Diaphragms in Steel Buildings
The lateral force resisting system (LFRS) of a steel building consist of two parts, i.e., a vertical LFRS such as braced frames or shear walls, and a horizontal LFRS with diaphragms playing a crucial role. There are various types of floor and roof diaphragms in steel buildings, such as …
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Kinetic wall : an exploration into dynamic structure
… environment with the aid of many specialized systems working in conjunction; circulatory system, nervous system, structure system and means of motion. For a building to exhibit this kind of sophistication, the integration and design of such active systems must be investigated. With new …
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A Decision-Making Framework for Vegetated Roofing System Selection
… "optimal" solution to a design problem. Green roofs have many different characteristics based on a variety of variables. Designers typically weigh the impacts of these characteristics in an implicit process based on intuition or past experience. But since vegetated roofing is a relatively …
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An Exploration of the Natural Ventilation Strategies At the World Trade Center, Amsterdam
… heated and cooled using modern energy efficient systems the atrium areas are ventilated using an innovative passive system. This passive system relies on turbulence and negative pressure along the roof system to draw air through the space and positive pressure (due to wind driven forces) at the …
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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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Investigation of Single Span Z-Section Purlins Supporting Standing Seam Roof Systems Considering Distortional Buckling
… purlins supporting a standing seam metal roof system is the 1996 AISI Specification for the Design of Cold-Formed Steel Structural Members, which contains provisions for local and lateral buckling. Previous research has determined that the AISI provisions for local buckling strength …
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