Table 8. Percent breakdown of observations among different body part by thinning for forest fire prevention operation(Site 4).

	CODE	Worker 12(%)	Worker 13(%)	Worker 14(%)
Back posture	1	64.7	81.6	76.1
	2	18.8	12.7	21.3
	3	14.2	1.3	1.3
	4	2.3	4.4	1.3
Arm posture	1	77.1	75.3	72.3
	2	14.6	4.4	21.9
	3	8.3	20.3	5.8
Leg posture	1	-	-	-
	2	34.9	22.9	26.5
	3	0.9	-	0.6
	4	13.3	1.9	5.2
	5	28.9	43.0	46.5
	6	-	-	-
	7	22.0	32.3	21.3
External load	1	-	-	-
	2	100.0	100.0	100.0
	3	-	-	-