Civil Engineering Reference
In-Depth Information
TABLE 42.2 Group A Definitions
Movement
Score
Change score
Trunk Postures
Upright
1
þ1 if twisting of side flexed
0-208 flexion 0-208 extension
2
20-608 flexion
.
208 extension
3
.
60 flexion
4
Neck Postures
0-208 flexion
1
þ1 if twisting or side flexed
.
208 flexion or extension
2
Leg Postures
Position
Bilateral weight-bearing, walking, or
sitting
1
þ
1 if knee(s) between 30 and 60
8
flexion
Unilateral weight-bearing, feather
weight-bearing, or an unstable
posture
2
þ2 if knee(s)
.
608 flexion (N.B. not for
sitting)
The postures are scored by observing the task by video, photograph or in real time and allocating scores for
the body parts (Group A and Group B) load
force, coupling, and activity as shown in Figure 42.3. These
data are recorded on the Score Sheet (Figure 42.4). The choice of right or left arm is usually driven by avail-
ability (what can be observed); however, it is also possible to score both sides and then choose the highest
score to take forward in the score sheet (see examples in Figure 42.5 and Figure 42.6). The scores are then
transformed via Table A (Table 42.4) and Table B (Table 42.5) into SCORE A and SCORE B. At this stage,
the additional scores are added for load
/
force (Table 42.4), with an additional score for shock or rapid
build-up of force (e.g., catching a load), and coupling (Table 42.5). The coupling score uses four levels
(good, fail, poor, and unacceptable) to give an indication of the interface between the person and the
load and allows for both manual and other body region interfaces.
SCORE A and SCORE B are then entered onto Table C (Table 42.6) to produce SCORE C. At this stage,
the Activity Score (Table 42.7) is added to give additional scores for:
/
.
One or more body parts are static
.
Repeated small range actions
.
Large range changes in postures or unstable base
This gives a final REBA SCORE, which is then interpreted into an Action Level using Table 42.7.
The five action levels give an indication of the urgency of avoiding or reducing the risk of the assessed
posture.
42.3 Examples
Two examples are given in Figure 42.5 and Figure 42.6. The scoring rationale is outlined in the following
sections. Both of these examples were part of an initial ergonomic workplace assessment and have been
subsequently changed. The medical notes area was relocated in a specially designed building, with appro-
priate height racking and safety stepladders. The pediatric cot was redesigned with a U.K. manufacturer
and has been replaced with an electric cot with redesigned cot sides.
42.3.1 Example 1: Filing Medical Notes
Group A
Trunk
2(0
8
-20
8
extension; twisting
side flexion more than 20
8
)
¼
/
Neck
2 (greater than 20
8
extension; twisting
side flexion less than 20
8
)
¼
/
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