• Journal of the Korea Institute of Building Construction
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• v.8 no.5
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• pp.127-134
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• 2008

The purpose of this study is to propose the decision making technique in roof waterproofing method at the early construction stage. Selecting the suitable construction method is difficult because of the complex interrelationships between many factors of influencing the construction method selection. This study presents an example of selecting suitable method by analyzing LCC (Life Cycle Cost) in roof waterproofing work. In this study, roof waterproofing method is analyzed by LCC(Life Cycle Cost) which is consists of the initial costs, running costs, and removal costs. Sheet waterproofing, membrane waterproofing and asphalt waterproofing costs are compared to select the most economic method. The result of this study revealed that considering LCC is useful in selecting the proper method in the construction work.

• KIEAE Journal
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• v.15 no.6
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• pp.63-68
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• 2015

Purpose: Most if buildings need various repair works for preventing or delaying the deterioration which gives rise to affect the living condition or function after constructed. Therefore, a long-term repair schedule should be planned and a repair cost is required. In this paper, it aimed at providing the statistical forecast model for a repair cost in roof water-proofing work and elevator work using statistical approach with three variables such as number of household, management area and a elapsed year. Data are collected in apartment housings which are located in Seoul area and conducted with interview and questionnaire sheet. Each analyzed work is divided into a partly work and fully work. Results of this study are shown that, first, the regression model takes a multiplying type like a Cobb-Douglas function and is changed into the log-linear type to include the three variable simultaneously. Second, the goodness-of-fit of the repair cost forecasting model has a good statistics in determinant's coefficient and Dubin-Watson value. Third, the management area is stronger factor than other the number of household and an elapsed year in roof water-proofing work and elevator work.

• Journal of the Korean Geographical Society
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• v.19
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• pp.41-51
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• 1979

Since 1971 when the nation wide 'New Community' movement was launched to improve rural standards of living, dol and thatched-roof houses have been reshaped or removed, thereby making it hard to find time-honored people's living structures in the countryside. Since 1977, the improvement work of rural houses has started throughout the country, so many new rural residences have been constructing along the highway, main roads, railways and around the sightseeing area, New rural houses do not show, for the most part, the traditional architectural style and the nation's unique conventional ways of living. The writer tried to find solutions to the problems derived from improvement work of rural residence, in a comparative method of traditional rural houses and newly constructed rural ones. The greater part of new rural houses' types, painting colors, and fence types had been recommended by provincial administrative trative officials. Officials recommended them to the farmer with their standards, which did not consider farmer's convenience of traditional way of life, but a fine sight from the highways or railways. Korea's three basic roof types are the HAPKAK roof (gabled and hipped), the UCHINKAK roof(hipped), and the BAKKOONG roof(gabled). However, the gabled roof houses, having their entrance on the gabled side, are found more ofter in new rural village. As mentioned above, architectural style is not harmonious with the topography and climate i Korea, because it is not Korean traditional type, but one of the western styles. And new rural house plans are inconvenient in the conservation rural family system, because of the same category with urban houses plans. Other problems derived from ton-traditional architecture style are roof painting in 4-5 colors in a new village, types of wall and fence, and attached building in the site.

• Wind and Structures
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• v.5 no.6
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• pp.493-514
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• 2002

Seven hip roof building models for $10^{\circ}$, $15^{\circ}$, $20^{\circ}$, $25^{\circ}$, $30^{\circ}$, $35^{\circ}$ and $40^{\circ}$ roof pitch with large overhangs of 1.1 m were tested in a wind tunnel at the university of Roorkee, India to investigate wind pressure distributions over hip roofs for various roof pitch and wind direction. The results show that the roof pitch and wind direction do significantly affect the magnitude and distribution of the roof pressures. The $40^{\circ}$ roof pitch has been found to experience the highest peak suctions at the roof corners amongst the seven hip roofs tested. Pressures on $15^{\circ}$, $20^{\circ}$ and $30^{\circ}$ hip roofs are comparable with those reported by Xu and Reardon (1998). Meecham et al. (1991) for $18.4^{\circ}$ hip roof is compatible with $15^{\circ}$ hip roof of the present study. Holmes's works (1994) on gable roof have also been compared with the present work. Zoning for codification has also been attempted since IS875 (Part-3) does not include this information. A comparison for design value has also been made with BRE Report No. 346.

• Journal of Korean Association for Spatial Structures
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• v.17 no.3
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• pp.45-55
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• 2017

The objective of this study is to estimate the mechanical characteristics and nonlinear behaviors on the geometric nonlinear analysis of curved cable-membrane roof systems for long span lightweight roof structures. The weight of a cable-membrane roof dramatically can reduce, but the single layer cable-membrane roof systems are too flexible and difficult to achieve the required structural stiffness. A curved cable roof system with reverse curvature works more effectively as a load bearing system, the pretension of cables can easily increase the structural stiffness. The curved cable roof system can transmit vertical loads in up and downward direction, and work effectively as a load bearing structure to resists self-weights, snow and wind loads. The nonlinear behavior and mechanical characteristics of a cable roof system has greatly an affect by the sag and pretension. This paper is carried out analyzing and comparing the tensile forces and deflection of curved roof systems by vertical loads. The elements for analysis uses a tension only cable element and a triangular membrane element with 3 degree of freedom in each node. The authors will show that the curved cable-membrane roof system with reverse curvature is a very lightweight and small deformation roof for external loads.

• Journal of the Korean Society of Safety
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• v.27 no.5
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• pp.111-116
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• 2012

This study analyzed the accidents and researched on risk of the actual condition in roof works. This study revealed that 68% of accidents in roof works occurred on small sized construction sites. And 79% of accidents are caused by fall. It is simply because most laborers do not wear the safety harness and the mounted equipment is not properly installed. According to our research, we realize that most of roof works have some risk of the fall accidents. Most of roof working sites have the danger of falling at ladder and temporary walkway. In oder to prevent accidents in roof works, the basic rule such as wearing the safety harness must be followed.

• Proceedings of the KSR Conference
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• 2007.05a
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• pp.58-68
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• 2007

Thorough preparations and investigations must be done in order to prevent the hazards which will happen when workers work on the roof of the rolling stocks. Some industrial disasters can be prevented by solving the risks involved in the working of the work processes. Falling accidents tend to happen from the roof of the trains when workers work in the high position. So through the analysis of the 4M( Man. Machine, Media, Management), this paper analyzed the risk factors among the roof works and all problems of the maintenance. Also this paper suggests new devices or new methods to prevent falling disasters and to relieve the mental senses of uneasiness.

• Journal of Korean Society of Steel Construction
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• v.28 no.3
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• pp.139-149
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• 2016

Roof cladding of buildings are required for the measures about the 'screw pull-out' which causes the casualties and the property damage by typhoons. In this study, the pull-out resistance was increased by increasing the penetration depth of the screw installing a ironware called 'insert nut' on the roof cladding frame. Tensile tests were conducted to compare the pull-out strengths of a general screw-joint and a nut insert joint. Roof cladding that is actually being used in the field was produced using the 'solid work' and then the roof claddings using a general screw-joint and a nut insert joint were compared by a static test and dynamic test.

• Journal of the Korea Fashion and Costume Design Association
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• v.7 no.3
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• pp.53-61
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• 2005

With the acceptance of western culture, our traditional culture is in the crisis of disappearing. This is especially evident in the clothing and textile field. Therefore it seems essential to apply the traditional Korean aesthetics to our clothing. The purpose of this study is to reconstruct the types of design and analyse the characteristics of patterns expressed in traditional roof-tile. This study attempted to use the roof-tile patterns as motive for all tapestry and fashion design work to realize a creative expression of formative world through on-screen restructuring. The traditional roof-tile patterns were selected for this study because they must be the products created with our ordinary aesthetic values and techniques, and thus may represent our people's unique culture. After all, the expression for a work should be based not on simple representations of a given object but on restructuring of diverse unique forms according to worker's subjective senses. A piece of clothing with the expression of traditional and formative must combine traditional aesthetics of tradition and form. The application of traditional and formative value of Korean pattern in clothing made to be adaptable for wear in our everyday lives. Today there various attempts to combine traditional aesthetics with modem design. Also, the development of unique Korean design aesthetics within the clothing will allow for a distinct elegance that can be recognized by the world know about the Korean culture through the high standards of our clothing.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2005.05a
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• pp.179-183
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• 2005

In apply roof waterproof system using of synthetic high polymer sheet for rooftop measure physical performance (tension$\cdot$tearing ability, temperature relativity, heating stretch performance, junction performance, wind resistance test) by various test environment condition waterproof test of structure and performance of construction work aspect, present suitable form of construction work under these environment. Also, wish to improve durability of concrete structure as that examine in priority about adhesion method and joint junction method with waterproof out surface, and present new direction about roof system application of waterproofing method for rooftop.