![]() It is fairly well-suited to both mud application and detail/finishing work, and as such, is typically the most-used size. The five inch or six inch knife deserves special attention, as this middle-sized knife fills a special niche. These larger knives are commonly called taping knives and have a square shape to them. These knives are great for smoothing the tracks left by smaller knives, feathering mud, and generally leaving a clean surface at the end stages of the project after detailing has been completed. ![]() Larger knives (6” and greater) are great for finishing, since they allow you to cover more ground with lighter pressure. Smaller knives are more likely to leave marks and uneven surfaces, but in the initial stages, that’s okay, since you will come back to do another coat. This is designed to allow the knife to fit into corners without damaging the wall. Joint knives are also rounded with sloping sides. Their smaller size allows you to get into smaller spaces and crevices, as well as use more pressure to force mud into seams and the holes left by screws. Smaller knives, (6” and smaller) are commonly known as joint knives, and are best for the first stages of a project. Size may be the single most important consideration in choosing a taping knife, as the size determines what stage of construction the knife is suited to. How are you supposed to know which knife is right for you? This guide to the all the possibilities will take the guesswork out of choosing the right knife for you and your project. However, the number of options can be overwhelming: size, handle material, blade material, special features. A true workhorse, most projects would simply not be possible without a taping knife.Ĭonsidering how important taping knives are, it’s critical to choose the right one for you and for your project. They are used for applying mud, finishing, laying tape, and more. Velásquez S, Valderrama S, Giraldo D (2016) Ergonomic assessment of natural rubber processing in plantations and small enterprises.Taping knives are an indispensable part of every drywall professional’s toolkit. Udom C, Kanlayanaphotporn R, Janwantanakul P (2018) Predictors for nonspecific low back pain in rubber farmers: a 1-year prospective cohort study. Udom C, Janwantanakul P, Kanlayanaphotporn R (2016) The prevalence of low back pain and its associated factors in Thai rubber farmers. Stankevitz K, Schoenfisch A, de Silva V, Tharindra H, Stroo M, Ostbye T (2016) Prevalence and risk factors of musculoskeletal disorders among Sri Lankan rubber tappers. Pramchoo W, Geater AF, Harris-Adamson C, Tangtrakulwanich B (2018b) Ergonomic rubber tapping knife relieves symptoms of carpal tunnel syndrome among rubber tappers. Pramchoo W, Geater AF, Tangtrakulwanich B (2018a) Physical ergonomic risk factors of carpal tunnel syndrome among rubber tappers. Meksawi S, Tangtrakulwanich B, Chongsuvivatwong V (2012) Musculoskeletal problems and ergonomic risk assessment in rubber tappers: a community-based study in southern Thailand. McAtamney L, Corlett EN (1993) RULA: a survey method for the investigation of work-related upper limb disorders. Keyserling WM (1986) Postural analysis of the trunk and shoulders in simulated real time. Karhu O, Kansi P, Kuorinka I (1977) Correcting working postures in industry: a practical method for analysis. Int J Ind Ergon 57:32–41ĭoi MAC, Yusuff RM, Leman Z (2007) A preliminary study of prevalence of musculoskeletal disorders among Malaysian rubber tappers. Massey University, New ZealandĬhander DS, Cavatorta MP (2017) An observational method for postural ergonomic risk assessment (PERA). Hence preventative measures are to be suggested in order to prevent bad working.īoonphadh P (2008) The perceived effects of work on health of rubber farmers in southern Thailand. The analysis also reveals that the second task has been reported with the major score in the rubber tapping process. Therefore, the body postures resulted by the tapping work are not acceptable and corrective actions are necessary. The overall PERA score of 8 or more for the work cycle, which is corresponding to a level of ‘high risk’. ![]() Direct observation and video-based analysis of the body posture using PERA tool are adopted in this study. A sample of ten rubber tappers has been selected for this study. The cyclic work involved in the rubber tapping can be divided into four tasks such as (i) Removal of latex cover from the channel, (ii) Incision on the channel (iii) Adjusting the collection cup and (iv) Moving to the next rubber tree. Thus, this analysis tool is suitable to evaluate the rubber tapping process. PERA is a body posture analysis tool to evaluate short cyclic work. The rubber tapping is a monotonous task involving cyclic operations by making incisions on more than 300 rubber trees every day.
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