ILO Home
Go to the home page
Site map | Contact us Franšais | Espa˝ol

CISDOC database

Document ID (ISN)110779
CIS number 10-0424
ISSN - Serial title 0003-6870 - Applied Ergonomics
Year 2010
Convention or series no.
Author(s) Hess J.A., Kincl L., Amasay T., Wolfe P.
Title Ergonomic evaluation of masons laying concrete masonry units and autoclaved aerated concrete
Bibliographic information May 2010, Vol.41, No.4, p.477-483. Illus. 26 ref.
Abstract Masons working with concrete masonry unit (CMU) blocks have high rates of work-related musculoskeletal disorders to the low back and shoulders associated with repetitively lifting and buttering heavy blocks. Autoclaved aerated concrete (AAC) may reduce the risk of shoulder and back injury. This study evaluated shoulder exposure parameters, low back stress and worker perceptions in two groups of masons, one using CMU and the other using AAC blocks. Results indicate that for the left arm, AAC masons spent significantly more time than CMU masons in static (38.2% versus 31.1%, respectively), and less time in slow motions (48.2% versus 52.2%, respectively) and faster motions (13.6% versus 16.7%, respectively). CMU masons had significantly greater shoulder and low back pain and they held blocks significantly longer than AAC masons. Low back compressive forces were high for both materials. Masons handling AAC demonstrated less left upper extremity stress but both materials were estimated to be hazardous to the low back.
Descriptors (primary) building materials; bricklaying; musculoskeletal diseases; work posture; ergonomic evaluation
Descriptors (secondary) manual handling; lumbar column; shoulder; pulse rate; measurement of work and effort; workload assessment; subjective assessment; comparative study; questionnaire survey; building industry; frequency rates
Document type D - Periodical articles
Subject(s) Construction industry
Broad subject area(s) Physiology, ergonomics
Browse category(ies) Construction industry and civil engineering
Diseases of the musculoskeletal system
Work posture
Cement and concrete