Anthropometry Applied in Dimensioning an Earth Auger

Lopes, Eduardo da Silva; Oliveira, Felipe Martins de; Machado, João Fábio; Bednarczuk, Ezaquel; Britto, Pedro Caldas

doi:10.1590/2179-8087.029015

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Original Article, Forest Management • Floresta Ambient. 25 (2) • 2018 • https://doi.org/10.1590/2179-8087.029015 copy

Anthropometry Applied in Dimensioning an Earth Auger

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The objective of this study was to show the application of anthropometric measurements in dimensioning an earth auger used in forest plantations, aiming to offer greater comfort, safety and health for workers. Based on anthropometric measures of a sample of 250 workers who worked on a forest implantation, seven measures in the 5, 50 and 95% percentiles obtained according to the German Standard DIN 33402/81 and related to the handling of the equipment were selected. Anthropometric standards of the workers were determined with minimum and maximum limits for the variables. Regression analyses were performed to verify the correlation between some anthropometric variables. The results show that the earth auger presented irregularities in terms of height and diameter of the handle; the measurements should range from 94 to 111 cm and 2.5 to 5.0 cm, respectively, enabling it to suit 90% of the worker population. The height showed a correlation of 68% with elbow height, and 67% with the hand center with arm hanging height.

Keywords:
forest implantation; posture analysis; ergonomics

Anthropometric measure	Dimensions related to the earth auger	Percentile (%)			Mean	SD	CV (%)
Anthropometric measure	Dimensions related to the earth auger	5	50	95	Mean	SD	CV (%)
Height (cm)	-	156.8	167.0	178.5	167.2	6.4	4
Body mass (kg)	-	54.9	68.7	85.2	69.8	10.3	7
Elbow height (cm)	Handle height	94.0	102.2	111.0	102.1	5.0	5
Height at the center of the hand, arm hanging down (cm)	Handle height	68.1	75.0	81.2	75.0	4.3	6
Hip width standing (cm)	Motor protection width	26.7	30.2	34.2	30.6	2.4	8
Palm width (cm)	Length of the handles	7.6	9.0	10.0	8.9	0.7	8
Maximum cylinder grip (cm)	Diameter of the handles	2.5	4.0	5.0	3.8	0.7	8

Anthropometric variable (Y)	Equation	R	R² adj.	Syx (%)
Elbow height (cm)	(1) Y = 6.0634 + 0.5793 × H	0.68	0.45	3.63
	(2) Y = 95.1569 + 0.111 × BM	0.31	0.09	4.68
	(3) Y = 5.4521 + 0.5924 x H – 0.0226 × BM	0.68	0.46	3.62
Height at the center of the hand, arm hanging down (cm)	(4) Y = - 0.2730 + 0.4503 × H	0.67	0.46	4.17
	(5) Y = 64.8825 + 0.145 × BM	0.35	0.12	5.32
	(6) Y = 1.077 + 0.4214 × H + 0.05 × BM	0.69	0.47	4.13
Hip width standing (cm)	(7) Y = 9.1374 + 0.1263 × H	0.34	0.11	7.33
	(8) Y = 20.535 + 0.1394 × BM	0.61	0.36	6.21
	(9) Y = 12.5819 + 0.0525 × H + 0.1275 × BM	0.62	0.38	6.13
Palm width (cm)	(10) Y = 4.6102 + 0.0257 × H	0.23	0.05	7.83
	(11) Y = 7.6805 + 0.0177 × BM	0.25	0.06	7.78
	(12) Y = 4.979 + 0.0178 × H + 0.0137 × BM	0.29	0.08	7.71
Maximum cylinder grip (cm)	(13) Y = 1.2677 + 0.0153 × H	0.14	0.02	17.58
	(14) Y = 3.802 + 0.0003 × BM	0.01	0.01	17.77
	(15) Y = 1.1696 + 0.0174 × H – 0.0036 × BM	0.15	0.02	17.60

Instituto de Florestas da Universidade Federal Rural do Rio de Janeiro Rodovia BR 465 Km 7, CEP 23897-000, Tel.: (21) 2682 0558 | (21) 3787-4033 - Seropédica - RJ - Brazil
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[1] *Eduardo da Silva LopesDepartamento de Engenharia Florestal, Universidade Estadual do Centro-Oeste - UNICENTRO, BR 153, Km 7, CEP 84540-000, Riozinho, Irati, PR, Brazil e-mail: eslopes@unicentro.br