For a 2-hour period each day, a worker picks up blocks weighing 12.5kg from an incoming conveyor belt, then turns towards the right and drops them into a box as shown in Figure Q6. Four blocks are loaded into the box every minute. The blocks are generally held close to the worker's body throughout the process. Using Table Q6 and the NIOSH lifting equation, illustrate if this is a cause for concern. Recommend, with reasons, any changes to the height of the conveyor belt to allow the worker to load the rolls effectively during the same period without any concern.

\fHorizontal Vertical Multiplier Distance Multiplier Twisting Multiplier Multiplier Frequency Multiplier Grip Multiplier tm F Duration of Lifting tasks Lifts Grip /Hin Type $35 1.00 78 $25 1.00 deg $1hr 38 85 2hr 10 8hr 81 LO Good .93 D V >75 40 $75 >75 20 $75 >75 84 $75 55 90 15 Fair 0.95 .95 0.2 1.00 1.00 .95 47 -95 . 78 .85 30 85 87 Poor 70 0.9 88 30 90 0.5 97 . 97 92 74 40 92 90 81 87 45 86 94 LE BA .69 50 75 93 .75 100 87 60 .81 .91 .91 84 50 65 96 65 115 .86 75 76 3 88 88 50 79 .63 70 79 55 99 .55 130 86 .71 4 B4 52 72 60 80 72 45 99 . 45 145 85 105 .56 5 80 . .80 60 57 60 .35 .96 160 .35 . 85 120 . 62 75 56 -75 50 54 SO 100 .27 .27 175 85 135 .57 7 70 58 . 70 52 42 110 42 90 22 22 >175 >135 60 . 60 60 35 .50 35 120 18 87 - 18 .52 52 30 62 30 48 130 . 15 84 10 45 45 26 140 .26 81 . 13 17 66 .45 150 . 78 12 .37 . 37 21 Table 06