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Hester J. Lipscomb - One of the best experts on this subject based on the ideXlab platform.
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rates of and circumstances surrounding work related falls from height among union Drywall carpenters in washington state 1989 2008
Journal of Safety Research, 2014Co-Authors: Ashley L Schoenfisch, Wilfrid Cameron, Hester J. Lipscomb, Darrin Adams, Barbara SilversteinAbstract:Abstract Background Drywall installers are at high risk for work-related falls from height (FFH). Methods We defined a 20-year (1989–2008) cohort of 5,073 union Drywall carpenters in Washington State, their worker-hours, and FFH. FFH rate patterns were examined using Poisson regression. Results Drywall installers' FFH rates declined over time and varied little by worker age and time in the union. However, among FFH involving Drywall sheets, workers with Practical Applications In addition to continued efforts to prevent falls from scaffolds and ladders, efforts should address stilt use and less experienced workers who may have greater exposure. Consistency in reported narrative elements may improve FFH risk factor identification and prevention effort evaluation.
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declining rates of work related overexertion back injuries among union Drywall installers in washington state 1989 2008 improved work safety or shifting of care
American Journal of Industrial Medicine, 2014Co-Authors: Ashley L Schoenfisch, Alan M Brookhart, Carri H Casteel, Hester J. Lipscomb, David B Richardson, Stephen W. Marshall, Wilfrid CameronAbstract:INTRODUCTION: Construction workers are at high risk of work-related musculoskeletal back disorders, and research suggests medical care and costs associated with these conditions may be covered by sources other than workers' compensation (WC). Little is known about the back injury experience and care seeking behavior among Drywall installers, a high-risk workgroup regularly exposed to repetitive activities, awkward postures, and handling heavy building materials. METHODS: Among a cohort of 24,830 Washington State union carpenters (1989-2008), including 5,073 Drywall installers, we identified WC claims, visits for health care covered through union-provided health insurance and time at risk. Rates of work-related overexertion back injuries (defined using WC claims data) and health care utilization for musculoskeletal back disorders covered by private health insurance were examined and contrasted over time and by worker characteristics, stratified by type of work (Drywall installation, other carpentry). RESULTS: Drywall installers' work-related overexertion back injury rates exceeded those of other carpenters (adjusted IRR 1.63, 95% CI 1.48-1.78). For both carpentry groups, rates declined significantly over time. In contrast, rates of private healthcare utilization for musculoskeletal back disorders were similar for Drywall installers compared to other carpenters; they increased over time (after the mid-1990s), with increasing years in the union, and with increasing numbers of work-related overexertion back injuries. CONCLUSIONS: Observed declines over time in the rate of work-related overexertion back injury, as based on WC claims data, is encouraging. However, results add to the growing literature suggesting care for work-related conditions may be being sought outside of the WC system. Am. J. Ind. Med. © 2013 Wiley Periodicals, Inc. Language: en
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work related injuries among union Drywall carpenters in washington state 1989 2008
American Journal of Industrial Medicine, 2013Co-Authors: Ashley L Schoenfisch, Hester J. Lipscomb, David B Richardson, Wilfred Cameron, Steve Marshall, Carri H CasteelAbstract:BACKGROUND: Drywall installers are at high-risk of work-related injury. Comprehensive descriptive epidemiology of injuries among Drywall installers, particularly over time, is lacking. METHODS: We identified worker-hours and reported and accepted workers' compensation (WC) claims for a 20-year (1989-2008) cohort of 24,830 Washington State union carpenters. Stratified by predominant type of work (Drywall installation, other carpentry), work-related injury rates were examined over calendar time and by worker characteristics. Expert interviews provided contextual details. RESULTS: Drywall installers' injury rates, higher than those of other carpenters, declined substantially over this period by 73.6%. Common injury mechanisms were struck by/against, overexertion and falls. Drywall material was considered a contributing factor in 19.7% of injuries. One-third of these Drywall material-related injuries resulted in paid lost time, compared to 19.4% of injuries from other sources. Rates of injury were particularly high among workers with 2 to Language: en
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298 falls from elevation among union Drywall installers patterns in rates of injury and the utility of event narratives
Occupational and Environmental Medicine, 2013Co-Authors: Ashley L Schoenfisch, Hester J. LipscombAbstract:Objectives Despite prevention efforts over the past several decades, Drywall installers in the US remain at risk for work-related falls from elevation. These workers are challenging to study from an epidemiologic perspective. The purpose of this study was to describe patterns in Drywall installers’ rates of work-related injury from falls from elevation and event circumstances. Methods Using data from the Carpenters Trusts of Western Washington and Washington State Department of Labour and Industries, we defined a cohort of 5,073 union Drywall carpenters, their 37 million union work hours in Washington State, and their workers’ compensation claims from 1989–2008. Individual-level data were linked using an encrypted identifier. Rates of work-related injury were calculated using Poisson regression. Injury event narratives provided additional details. Results Falls from elevation made up 7.5% (n = 454/6,066) of work-related injuries among Drywall installers. Rates of injury from falls from elevation declined from 7.8 per 200,000 worker-hours in 1989 to 1.1 per 200,000 worker-hours in 2008. Rates varied little by age and time in the union, except among 9% of events in which Drywall material was a contributing factor; workers with 10 + union years had lower rates than their less tenured counterparts. Brief narratives consistently identified surfaces from which workers fell, commonly scaffolds (33%), ladders (21%) and stilts (13%). Worker task, described in 17.5% of events, often included Drywall hanging, drilling/screwing or moving material. Information was lacking on height fallen, PPE use, work speed and influence of other workers. Conclusions In addition to continued efforts to prevent work-related falls from scaffolds and ladders, particular attention should be paid to the prevention of Drywall-handling-related falls among less experienced workers who may be at greater risk due to greater exposure. Improvements in the consistency of narrative data elements may enhance efforts to identify risk factors or evaluate regulatory changes or interventions.
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falls in residential carpentry and Drywall installation findings from active injury surveillance with union carpenters
Journal of Occupational and Environmental Medicine, 2003Co-Authors: Hester J. Lipscomb, John M Dement, James Nolan, Dennis Patterson, Wilfred CameronAbstract:Active injury surveillance was conducted with a large, unionized workforce of residential and Drywall carpenters over a 3-year period. Injured carpenters were interviewed by trained carpenter investigators and sites were visited where falls occurred. Qualitative information was collected on exposures, risk perception, training, and mentoring. Falls accounted for 20% of injuries. Same-level falls were often related to weather, carrying objects-sometimes with an obstructed view-housekeeping, terrain of the lot, and speed of work. Falls from height occurred from a variety of work surfaces and involved ladders, scaffolding, roofs, work on other unsecured surfaces, unprotected openings, speed, and weather conditions. Recognized fall protection strategies, such as guardrails, toe boards, tying off to appropriate anchors, and guarding openings, would have prevented many of these falls; these practices were not the norm on many sites.
Ashley L Schoenfisch - One of the best experts on this subject based on the ideXlab platform.
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rates of and circumstances surrounding work related falls from height among union Drywall carpenters in washington state 1989 2008
Journal of Safety Research, 2014Co-Authors: Ashley L Schoenfisch, Wilfrid Cameron, Hester J. Lipscomb, Darrin Adams, Barbara SilversteinAbstract:Abstract Background Drywall installers are at high risk for work-related falls from height (FFH). Methods We defined a 20-year (1989–2008) cohort of 5,073 union Drywall carpenters in Washington State, their worker-hours, and FFH. FFH rate patterns were examined using Poisson regression. Results Drywall installers' FFH rates declined over time and varied little by worker age and time in the union. However, among FFH involving Drywall sheets, workers with Practical Applications In addition to continued efforts to prevent falls from scaffolds and ladders, efforts should address stilt use and less experienced workers who may have greater exposure. Consistency in reported narrative elements may improve FFH risk factor identification and prevention effort evaluation.
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declining rates of work related overexertion back injuries among union Drywall installers in washington state 1989 2008 improved work safety or shifting of care
American Journal of Industrial Medicine, 2014Co-Authors: Ashley L Schoenfisch, Alan M Brookhart, Carri H Casteel, Hester J. Lipscomb, David B Richardson, Stephen W. Marshall, Wilfrid CameronAbstract:INTRODUCTION: Construction workers are at high risk of work-related musculoskeletal back disorders, and research suggests medical care and costs associated with these conditions may be covered by sources other than workers' compensation (WC). Little is known about the back injury experience and care seeking behavior among Drywall installers, a high-risk workgroup regularly exposed to repetitive activities, awkward postures, and handling heavy building materials. METHODS: Among a cohort of 24,830 Washington State union carpenters (1989-2008), including 5,073 Drywall installers, we identified WC claims, visits for health care covered through union-provided health insurance and time at risk. Rates of work-related overexertion back injuries (defined using WC claims data) and health care utilization for musculoskeletal back disorders covered by private health insurance were examined and contrasted over time and by worker characteristics, stratified by type of work (Drywall installation, other carpentry). RESULTS: Drywall installers' work-related overexertion back injury rates exceeded those of other carpenters (adjusted IRR 1.63, 95% CI 1.48-1.78). For both carpentry groups, rates declined significantly over time. In contrast, rates of private healthcare utilization for musculoskeletal back disorders were similar for Drywall installers compared to other carpenters; they increased over time (after the mid-1990s), with increasing years in the union, and with increasing numbers of work-related overexertion back injuries. CONCLUSIONS: Observed declines over time in the rate of work-related overexertion back injury, as based on WC claims data, is encouraging. However, results add to the growing literature suggesting care for work-related conditions may be being sought outside of the WC system. Am. J. Ind. Med. © 2013 Wiley Periodicals, Inc. Language: en
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work related injuries among union Drywall carpenters in washington state 1989 2008
American Journal of Industrial Medicine, 2013Co-Authors: Ashley L Schoenfisch, Hester J. Lipscomb, David B Richardson, Wilfred Cameron, Steve Marshall, Carri H CasteelAbstract:BACKGROUND: Drywall installers are at high-risk of work-related injury. Comprehensive descriptive epidemiology of injuries among Drywall installers, particularly over time, is lacking. METHODS: We identified worker-hours and reported and accepted workers' compensation (WC) claims for a 20-year (1989-2008) cohort of 24,830 Washington State union carpenters. Stratified by predominant type of work (Drywall installation, other carpentry), work-related injury rates were examined over calendar time and by worker characteristics. Expert interviews provided contextual details. RESULTS: Drywall installers' injury rates, higher than those of other carpenters, declined substantially over this period by 73.6%. Common injury mechanisms were struck by/against, overexertion and falls. Drywall material was considered a contributing factor in 19.7% of injuries. One-third of these Drywall material-related injuries resulted in paid lost time, compared to 19.4% of injuries from other sources. Rates of injury were particularly high among workers with 2 to Language: en
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298 falls from elevation among union Drywall installers patterns in rates of injury and the utility of event narratives
Occupational and Environmental Medicine, 2013Co-Authors: Ashley L Schoenfisch, Hester J. LipscombAbstract:Objectives Despite prevention efforts over the past several decades, Drywall installers in the US remain at risk for work-related falls from elevation. These workers are challenging to study from an epidemiologic perspective. The purpose of this study was to describe patterns in Drywall installers’ rates of work-related injury from falls from elevation and event circumstances. Methods Using data from the Carpenters Trusts of Western Washington and Washington State Department of Labour and Industries, we defined a cohort of 5,073 union Drywall carpenters, their 37 million union work hours in Washington State, and their workers’ compensation claims from 1989–2008. Individual-level data were linked using an encrypted identifier. Rates of work-related injury were calculated using Poisson regression. Injury event narratives provided additional details. Results Falls from elevation made up 7.5% (n = 454/6,066) of work-related injuries among Drywall installers. Rates of injury from falls from elevation declined from 7.8 per 200,000 worker-hours in 1989 to 1.1 per 200,000 worker-hours in 2008. Rates varied little by age and time in the union, except among 9% of events in which Drywall material was a contributing factor; workers with 10 + union years had lower rates than their less tenured counterparts. Brief narratives consistently identified surfaces from which workers fell, commonly scaffolds (33%), ladders (21%) and stilts (13%). Worker task, described in 17.5% of events, often included Drywall hanging, drilling/screwing or moving material. Information was lacking on height fallen, PPE use, work speed and influence of other workers. Conclusions In addition to continued efforts to prevent work-related falls from scaffolds and ladders, particular attention should be paid to the prevention of Drywall-handling-related falls among less experienced workers who may be at greater risk due to greater exposure. Improvements in the consistency of narrative data elements may enhance efforts to identify risk factors or evaluate regulatory changes or interventions.
Wilfred Cameron - One of the best experts on this subject based on the ideXlab platform.
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work related injuries among union Drywall carpenters in washington state 1989 2008
American Journal of Industrial Medicine, 2013Co-Authors: Ashley L Schoenfisch, Hester J. Lipscomb, David B Richardson, Wilfred Cameron, Steve Marshall, Carri H CasteelAbstract:BACKGROUND: Drywall installers are at high-risk of work-related injury. Comprehensive descriptive epidemiology of injuries among Drywall installers, particularly over time, is lacking. METHODS: We identified worker-hours and reported and accepted workers' compensation (WC) claims for a 20-year (1989-2008) cohort of 24,830 Washington State union carpenters. Stratified by predominant type of work (Drywall installation, other carpentry), work-related injury rates were examined over calendar time and by worker characteristics. Expert interviews provided contextual details. RESULTS: Drywall installers' injury rates, higher than those of other carpenters, declined substantially over this period by 73.6%. Common injury mechanisms were struck by/against, overexertion and falls. Drywall material was considered a contributing factor in 19.7% of injuries. One-third of these Drywall material-related injuries resulted in paid lost time, compared to 19.4% of injuries from other sources. Rates of injury were particularly high among workers with 2 to Language: en
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falls in residential carpentry and Drywall installation findings from active injury surveillance with union carpenters
Journal of Occupational and Environmental Medicine, 2003Co-Authors: Hester J. Lipscomb, John M Dement, James Nolan, Dennis Patterson, Wilfred CameronAbstract:Active injury surveillance was conducted with a large, unionized workforce of residential and Drywall carpenters over a 3-year period. Injured carpenters were interviewed by trained carpenter investigators and sites were visited where falls occurred. Qualitative information was collected on exposures, risk perception, training, and mentoring. Falls accounted for 20% of injuries. Same-level falls were often related to weather, carrying objects-sometimes with an obstructed view-housekeeping, terrain of the lot, and speed of work. Falls from height occurred from a variety of work surfaces and involved ladders, scaffolding, roofs, work on other unsecured surfaces, unprotected openings, speed, and weather conditions. Recognized fall protection strategies, such as guardrails, toe boards, tying off to appropriate anchors, and guarding openings, would have prevented many of these falls; these practices were not the norm on many sites.
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work related injuries in Drywall installation
Applied Occupational and Environmental Hygiene, 2000Co-Authors: Hester J. Lipscomb, John M Dement, Wilfred Cameron, John Gaal, Vernon McdougallAbstract:Administrative data sources were used to describe the work-related injuries of Drywall carpenters, to calculate rates of occurrence, and to explore high risk sub-groups. Health insurance eligibility files were used to identify a cohort of active union carpenters affiliated with a union local whose predominant work involved Drywall installation in the state of Washington. These files contained the hours worked by each individual for each month between January 1989 and December 1995, providing person-hours at risk as a union carpenter. The Washington Department of Labor and Industries (L&I) provided records of workers' compensation claims filed by these individuals. Over seven years 1773 Drywall carpenters filed 2567 workers' compensation claims representing an overall rate of 53.3 per 200,000 hours worked. These claims were filed by 1046 different individuals, or 59.0 percent of the cohort. Claims resulting in paid lost time from work were filed at a rate of 12.5 per 200,000 hours worked (n = 609) by 445 (...
Maria A. Founti - One of the best experts on this subject based on the ideXlab platform.
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Thermal Assessment of a Novel Drywall System Insulated with VIPs
Energies, 2019Co-Authors: Ioannis A. Atsonios, Ioannis D. Mandilaras, Maria A. FountiAbstract:Advanced building envelopes targeting high energy performance should combine high thermal performance with easy and fast installation. The combination of lightweight steel-framed building systems with vacuum insulation panels (VIPs) form an attractive solution toward this requirement. In the present study, a lightweight metal frame Drywall building insulated with VIPs is constructed and experimentally/theoretically investigated, focusing on the impact of every type of thermal bridges on the thermal performance of the envelope and its upgrade due to the presence of the VIPs at the walls. Temperature measurements obtained at several locations of the envelope, over a period of one year, are presented and analyzed. The results are in agreement with the theoretical values and demonstrate that the VIPs can reduce the thermal transmittance of the central part of the wall by ca. 50%, limiting the impact of metal studs. The paper discusses the impact of dimensional inaccuracies and damaged panels on the thermal performance of the envelope. It is shown that VIP decreases the impact of thermal bridges and reduces the risk of condensation inside the walls.
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Thermal and Mechanical Computational Study of Load-Bearing Cold-Formed Steel Drywall Systems Exposed to Fire
Fire Technology, 2016Co-Authors: Ilias D. Thanasoulas, Iason K. Vardakoulias, Dionysios I. Kolaitis, Charis J. Gantes, Maria A. FountiAbstract:The structural fire behavior of typical load-bearing Drywall systems, consisting of light cold-formed steel (CFS) studs, sheathed with single or double layers of gypsum plasterboards and air cavity or mineral wool insulation, is investigated. For that purpose, an efficient numerical modeling approach with satisfying accuracy is developed and validated against experimental and numerical results available in the literature. Heat transfer and structural analyses of the investigated Drywall assemblies are carried out, employing the computational tools ANSYS CFX and ADINA, respectively. Transient heat transfer analyses provide the spatial and temporal temperature variation over the Drywall assembly, which is assumed to be exposed to the standard ISO 834 fire curve from one side. Thermal simulation results are then introduced in the subsequent structural analyses, where the load-bearing capacity of the CFS studs under fire conditions is estimated, by means of Geometry and Material Nonlinear Analyses accounting for Imperfections (GMNIA). The load-bearing capacity assuming uniform cross-sectional temperature distributions is also evaluated and compared to the respective predictions under non-uniform temperature profiles. Results obtained by varying the imposed load or the applied temperature (fire duration), are compared to predictions of existing and literature-proposed fire design guidelines. EN 1993-1-2 provisions lead to average underestimation of the load-bearing capacity by approximately 20%, while the literature-proposed methods are found to underestimate the load-bearing capacity by 5% to 15%. The limitation of using a critical temperature of 350°C for the structural fire design of thin-walled sections is found to be rather conservative, since the investigated CFS studs are able to exhibit satisfying fire performance also under higher temperature conditions.
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experimental investigation of the fire resistance of multi layer Drywall systems incorporating vacuum insulation panels and phase change materials
Fire Safety Journal, 2016Co-Authors: Dimos A Kontogeorgos, Ioannis D. Mandilaras, Georgios K Semitelos, Maria A. FountiAbstract:Abstract This paper studies the fire resistance of innovative high thermally insulated multilayer Drywall assemblies incorporating conventional insulation materials, Phase Change Materials (PCMs) and Vacuum Insulation Panels (VIPs). An experimental study was developed and implemented into two directions. In the first direction, four different multilayer Drywall configurations were subjected to fire temperatures up to 900 °C from one side, while the other side was at ambient conditions. Each configuration consisted of a gypsum board with PCMs (PCM-GB), a standard gypsum board (S-GB), an Expanded Polystyrene (EPS) layer, a thermal insulation render containing EPS (TIR) and an insulation layer located between the PCM-GB and the S-GB. A different insulation layer was used for each configuration: cavity (no insulation), EPS, mineral wool (MW) (both conventional insulation materials) and Vacuum Insulation Panels (VIP) (super insulation material). In the second direction, Differential Scanning Calorimetry (DSC) measurements, at inert (nitrogen) and oxidized (air) environments, were performed for all the utilized materials. DSC results indicated that at temperatures up to 200 °C, the gypsum boards (both PCM-GB and S-GB) act as fire retardants because of the dehydration process. The paraffin and PMMA components of the PCM started to evaporate and oxidize at temperatures higher than 200 °C and up to 500 °C. The resin binder of the mineral wool started to volatilize and oxidize at 265 °C, while at 500 °C the mineral wool started to melt. The volatilization of the EPS started at 275 °C, while the full volatilization and oxidation took place at the temperature range between 420 °C and 550 °C. The chemically bound water of the TIR dehydrated at the temperature range between 50 °C and 200 °C, while the EPS contained in the TIR behaved similar as the EPS sample. Finally, the cellulose fibers contained in the VIP volatilized and oxidized at the temperature range between 320 °C and 480 °C. Furnace results confirmed the fire resistance behavior of the gypsum boards indicated by the dehydration “plateau”. The wall assembly with the EPS layer found to behave similar to the assembly with the cavity due to the fact that the EPS melted at temperatures near 200 °C. The wall assembly with the mineral wool delayed the temperature rise until 500 °C where it started to melt. The VIP layer found to significantly delay the penetration of the heat through the Drywall configuration when compared to the other configurations. According to the failure criteria regarding excessive temperature rise on the ambient facing side of the wall, the VIP layer was found to increase the time-to-failure by approximately 68%, with respect to the assembly with the cavity. On the other hand, the respective time increase for the conventional insulation materials was 2% and 19% for the EPS and the MW, respectively.
Avendaño Alegre Jenny - One of the best experts on this subject based on the ideXlab platform.
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Estudio comparativo técnico económico del sistema Drywall y los sistemas convencionales de construcción en el Perú
'Universidad Nacional de Ingenieria', 2019Co-Authors: Avendaño Alegre JennyAbstract:TesisEn el sector de la construcción de viviendas en el Perú se emplean generalmente sistemas constructivos basados en mezclas húmedas, como el concreto armado, la albañilería armada y la albañilería confinada, sistemas que conforman el campo de la llamada Construcción Convencional que en la presente tesis será comparado con uno de los sistemas del campo de La Construcción No Convencional, el “Drywall”, que se basa en la unión de piezas metálicas livianas y planchas de yeso. En los últimos 8 – 10 años, el sistema de construcción “Drywall”, han incursionado vigorosamente en el mercado peruano de la construcción y ello podría deberse entre otros factores al poco peso, rápido tiempo de ejecución y menor costo. Sin embargo, el uso del sistema ha estado limitado la gran medida a aplicaciones no estructurales: tabiquerías y cielorrasos. Un obstáculo importante para la extensión de su uso a aplicaciones estructurales ha sido la escasa información técnico-económica disponible. Ante esta situación se hace necesario no solo brindar información certificada sobre este sistema, sino compararlo desde los diferentes aspectos que involucra una edificación, con los sistemas convencionales, como concreto armado, albañilería armada y albañilería confinada. En la presente tesis se brinda información acerca de los materiales y procedimientos constructivos del sistema “Drywall” y de los sistemas de Albañilería Armada, Concreto Armado y Albañilería Confinada. Además se ha incluido el proyecto de una vivienda unifamiliar de dos pisos cuya estructura esta proyectada en los cuatro sistemas constructivos tratados
