a reduction in low back load when participants used the hydraulic
ladder rack system.
From the pre-intervention worker surveys, we found that the
ladder lift was a new innovation for more than 80% of the workers.
Based on the 36 operator usability follow-up questionnaires, all the
workers endorsed the lift as a significant improvement over the
manual racks they were currently using. Generally, they found
working with the ladder lift was easier, reduced their work load,
and reduced the possibility of them slipping.
The list of what facilitated their adoption of new innovations, in
no particular order, included: it will not deskill workers; it does not
require having to learn something new or change the way work is
done; it is too big to be stolen; it is affordable; it will improve
productivity; it is accessible; it gets the job done quicker; it is
a better tool that does the same thing; can be directly linked to
a problem; affects enough workers doing the task often enough.
The workers believed that the ladder lift would reduce their
musculoskeletal discomfort, and would reduce their fatigue at the
end of the working day. They said that during loading and offloading,
the load on their shoulders was reduced since their reach
was now shorter, and their balance was improved since the ladders
were held in the middle. They also thought it might reduce the
potential of traumatic injuries from slips and falls as workers were
no longer balancing on the van’s back bumper to remove the ladder,
especially during winter weather. This was especially true for the
shorter workers. Yet another advantage was that the Velcro straps
were easier to use and hence the ladder was more securely tied
down.
However, the use of the ladder lift was limited since they were
mostly used for larger extension ladders that were used only a few
days a month. Despite this, the workers reported that they were
frequently asked about the lift on worksites, and they were pleased
to demonstrate it to their co-workers. They were asked for their
opinion of its usefulness, and some had been asked by fellowworkers
whether they could try it out. This enthusiastic verbal
sharing of ‘‘know-how’’ has been found by another study to be
a major medium of communication amongst construction workers
(Styhre et al., 2006). One of the workers commented:
I have a good friend in another company. It’s a one-man
company and I usually meet him once a week for lunch. He’d just
bought a new rack for his van. He saw the ladder lift and asked,
‘‘Is that the one with the hydraulics?’’ and I said, ‘‘Yeah’’. He
asked, ‘‘What do you think of it?’’ We stood there yapping and I
showed him how [the hydraulic lift] worked and he said,
‘‘WOW!’’ He was sort of mad because he said he wished he
hadn’t bought his ladder rack and bought mine instead.
ลดต่ำหลังโหลดเมื่อผู้ใช้การไฮดรอลิกระบบแร็คบันไดจากการสำรวจคนงานแทรกแซงก่อน เราพบว่าการบันไดลิฟต์เป็นนวัตกรรมใหม่สำหรับมากกว่า 80% ของแรงคะแนนเฉลียจาก 36 ดำเนินงานติดตามผลแบบสอบถาม ทุกแรงงานรับรองลิฟต์เป็นปรับปรุงที่สำคัญผ่านการชั้นวางด้วยตนเองที่พวกเขาได้ใช้ โดยทั่วไป พวกเขาพบทำงานกับลิฟต์บันไดก็ง่าย ลดภาระงานของพวกเขาและลดลงเป็นไปได้ของการลื่นไถลสิ่งอำนวยความสะดวกในการนำนวัตกรรมใหม่ ในรายการดับ รวม: มันจะไม่ deskill แรงงาน มันไม่ได้ต้องมีการเรียนรู้สิ่งใหม่ หรือเปลี่ยนวิธีการทำงานทำ มากเกินไปที่จะถูกขโมย ราคาประหยัด มันจะปรับปรุงผลผลิต เข้า ได้รับงานทำเร็ว มันเป็นเครื่องมือที่ดีที่ไม่เหมือนกัน สามารถเชื่อมโยงโดยตรงกับปัญหา มีผลต่อคนงานเพียงพอที่ทำงานมักจะพอผู้ปฏิบัติงานเชื่อว่า ลิฟต์บันไดจะช่วยลดความสบายกล้ามเนื้อ และจะช่วยลดความเมื่อยล้าในการสิ้นวันทำการ พวกเขากล่าวว่า ในระหว่างการโหลด และ ถ่ายการโหลดบนไหล่ของพวกเขาลดลงตั้งแต่การเข้าถึงของพวกเขาเป็นตอนสั้น และปรับปรุงยอดดุลการตั้งแต่บันไดถูกจัดขึ้นในช่วงกลาง พวกเขาคิดว่า มันอาจลดการศักยภาพของการบาดเจ็บจากหลุด และมีน้ำตกเป็นแรงงานno longer balancing on the van’s back bumper to remove the ladder,especially during winter weather. This was especially true for theshorter workers. Yet another advantage was that the Velcro strapswere easier to use and hence the ladder was more securely tieddown.However, the use of the ladder lift was limited since they weremostly used for larger extension ladders that were used only a fewdays a month. Despite this, the workers reported that they werefrequently asked about the lift on worksites, and they were pleasedto demonstrate it to their co-workers. They were asked for theiropinion of its usefulness, and some had been asked by fellowworkerswhether they could try it out. This enthusiastic verbalsharing of ‘‘know-how’’ has been found by another study to bea major medium of communication amongst construction workers(Styhre et al., 2006). One of the workers commented:I have a good friend in another company. It’s a one-mancompany and I usually meet him once a week for lunch. He’d justbought a new rack for his van. He saw the ladder lift and asked,‘‘Is that the one with the hydraulics?’’ and I said, ‘‘Yeah’’. Heasked, ‘‘What do you think of it?’’ We stood there yapping and Ishowed him how [the hydraulic lift] worked and he said,‘‘WOW!’’ He was sort of mad because he said he wished hehadn’t bought his ladder rack and bought mine instead.
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