Slip induced falls have been identified as a major causative factor for injuries in workplace. Firefighter's boots play a critical role in personal safety and affects postural stability.
Objective
The purpose of the study was to examine slip severity in firefighters while wearing rubber and leather boots.
Methods
Thirty professional firefighters were tested on two separate days with a rubber boot and a randomly chosen leather boot. Firefighters performed a three minute simulated stair climb wearing a full set personal protective equipment (PPE). Following this, they performed normal walking trials and a slip trial without the knowledge of the slippery floor. After a brief rest, they repeated the stair climb and walking trials followed by another slip trial with the knowledge of the slippery floor.
Results
Significant differences were found in slip parameters between boot and slip types. Significantly greater slip parameters were seen in rubber boots and during unexpected slips.
Conclusions
These results suggest that rubber boots elicit greater slip severity indicating a 2.67 to 4.8 times and 2.49 to 3.6 times greater chance of a hazardous slip during unexpected and expected slips respectively, compared to leather boots. These findings provide practical information on firefighting work practices and PPE usage decisions.
Bureau of Labor Statistics, (2012). Incidence Rates of Nonfatal Occupational Injuries and Illness by Industry and Case Types. US Department of Labor.
2.
KarterM.J.Jr (2008). Fire loss in the United States 2007. Quincy, MA: National Fire Protection Association.
3.
CourtneyT.K., SorockG.S., ManningD.P., CollinsJ.W., & Holbein-JennyM.A. (2001). Occupational slip, trip, and fall-related injuries can the contribution of slipperiness be isolated?Ergonomics, 44, 1118–1137.
4.
CourtneyT.K., & WebsterB.S. (2001). Antecedent factors and disabling occupational morbidity - insights from the new BLS data. AIHAJ-American Industrial Hygiene Association, 62(5), 622–632.
KinclL.D., BhattacharyaA., SuccopP.A., & ClarkC.S. (2002). Postural Sway Measurements: A Potential Safety Monitoring Technique for Workers Wearing Personal Protective Equipment. Applied Occupational and Environmental Hygiene, 17(4), 256–266.
7.
DavisP.R. (1983). Human factors contributing to slips, trips and falls. Ergonomics, 26(1), 51–59.
8.
GauchardG., ChauN., MurJ.M., & PerrinP. (2001). Falls and working individuals: Role of extrinsic and intrinsic factors. Ergonomics, 44(14), 1330–1339.
9.
KongP.W., SuyamaJ., & HostlerD. (2013). A review of risk factors of accidental slips, trips, and falls among firefighters. Safety Science, 60, 203–209.
10.
HansonJ.P., RedfernM.S., & MazumdarM. (1999). Predicting slips and falls considering required and available friction. Ergonomics, 42(12), 1619–1633.
11.
ChanderH., GarnerJ.C., & WadeC. (2015a). Ground Reaction Forces in Alternative Footwear during Slip Events. International Journal of Kinesiology and Sports Science, 3(2), 1–8.
12.
SobeihT., DavisK., SuccopP., JetterW., BhattacharyaA. (2006). Postural balance changes in on-duty fire fighters: effect of gear and long work shifts. Journal of Occupational and Environmental Medicine, 48, 68e75.
13.
HurP., RosengrenK.S., HornG.P., SmithD.L., & Hsiao-WeckslerE.T. (2013). Effect of Protective Clothing and Fatigue on Functional Balance of Firefighters. Journal of Ergonomics.
14.
ParkK., RosengrenK.S., HornG.P., SmithD.L., & Hsiao-WeckslerE.T. (2011). Assessing gait changes in firefighters due to fatigue and protective clothing. Safety Science, 49(5), 719–726.
15.
Occupational Safety and Health Standards 1910, 1970. Fire Protection (1910.156) - Fire Brigades.
16.
National Fire Protection Association. (2000). NFPA 1971 Standard on Protective Ensemble for Structural Fire Fighting, 2000 Edition. Quincy, MA.
17.
DivertC., MornieuxG., BaurH., MayerH., BelliA. (2005). Mechanical Comparison of Barefoot and Shod Running. International journal of Sports Medicine, 26, 593–598.
18.
DiDomenicoA., McGorryR.W., & ChangC.C. (2007). Association of subjective ratings of slipperiness to heel displacement following contact with the floor. Applied ergonomics, 38(5), 533–539.
19.
ChanderH., GarnerJ.C., & WadeC. (2015b). Heel contact dynamics in alternative footwear during slip events. International Journal of Industrial Ergonomics, 48, 158–166.
20.
LiK.W. (1995). A biomechanical study of slipping accidents with load carriage, Ph. D. Dissertation, Texas Tech University, Lubbock, Texas.
21.
PerkinsP.J. (1978). Measurement of slip between the shoe and ground during walking, in Walkway Surfaces: Measurement of Slip Resistance, ASTM STP 649, Philadelphia, PA.
22.
StrandbergL., & LanshammarH. (1981). The dynamics of slipping accidents. Journal of Occupational Accidents, 3, 153–162.
23.
ChamR., RedfernM.S. (2002). Heel contact dynamics during slip events on level and inclined surfaces. Safety Sci, 40, 559–576.
24.
MoyerB.E., ChambersA.J., RedfernM.S., & ChamR. (2006). Gait parameters as predictors of slip severity in younger and older adults. Ergonomics, 49(4), 329–343.
25.
PunakallioA. (2005). Balance abilities of workers in physically demanding jobs, with special reference to firefighters of different ages. Journal of Sports Science and Medicine, 4, S1eS47.
26.
GarnerJ.C., WadeC., GartenR., ChanderH., & AcevedoE. (2013). The influence of firefighter boot type on balance. International Journal of Industrial Ergonomics, 43(1), 77–81.
27.
SinghN.B., NussbaumM.A., MadiganM.A. (2009). Evaluation of circumferential pressure as an intervention to mitigate postural instability induced by localized muscle fatigue at the ankle. International Journal of Industrial Ergonomics, 39, 821e827.
28.
ChanderH., GarnerJ.C., & WadeC. (2014). Impact on balance while walking in occupational footwear. Footwear Science, 6(1), 59–66.
29.
ChanderH., WadeC., & GarnerJ.C. (2015c). The influence of occupational footwear on dynamic balance perturbations. Footwear Science, 7(2), 115–126.
30.
MajumdarD., BanerjeeP.K., MajumdarD., PalM., KumarR., & SelvamurthyW. (2006). Temporal spatial parameters of gait with barefoot, bathroom slippers and military boots. Indian Journal of Physiology and Pharmacology, 50(1), 33.
31.
MenantJ., SteeleJ., MenzH., MunroB., LordS. (2009). Effects of walking surfaces and footwear on temporo-spatial gait parameters in young and older people. Gait & Posture, 29, 392e397.
32.
BohmH., & HoslM. (2010). Effect of boot shaft stiffness on stability joint energy and muscular co-contraction during walking on uneven surface. Journal of Biomechanics, 43, 2467–2472.
33.
ChangW.R., LiK.W., HuangY.-H., FiliaggiA., CourtneyT.K. (2004). Assessing floor slipperiness in fast-food restaurants in Taiwan using objective and subjective measures. Appl. Ergon., 35, 401–408.
34.
GrönqvistR., AbeysekeraJ., GardG., HsiangS.M., LeamonT.B., NewmanD.J., & Pai IVC.Y.C. (2001). Human-centred approaches in slipperiness measurement. Ergonomics, 44(13), 1167–1199.
McGorryR.W., DiDomenicoA., & ChangC.C. (2010). The anatomy of a slip: Kinetic and kinematic characteristics of slip and non-slip matched trials. Applied Ergonomics, 41(1), 41–46.
37.
BradyR.A., PavolM.J., OwingsT.M., & GrabinerM.D. (2000). Foot displacement but not velocity predicts the outcome of a slip induced in young subjects while walking. J. Biomech., 33, 803–808.
38.
HosodaM., YoshimuraO., TakayanagiK., KobayashiR., MinematsuA., NakayamaA., IshibashiT., WilsonC. (1997). The effect of various footwear types and materials, and of fixing of the ankles by footwear on upright posture control. J Physther Sci, 9, 47–51.
39.
HosodaM., YoshimuraO., TakayanagiK., KobayashiR., MinematsuA., SasakiH., MaejimaH., MatsudaY., ArakiS., NakayamaA., IshibashiT., TerazonoT. (1998). The effect of footwear on standing posture control. J. Phys. Ther. Sci, 10, 47–51.
40.
PlineK.M., MadiganM.L., & NussbaumM.A. (2006). Influence of fatigue time and level on increases in postural sway. Ergonomics, 49(15), 1639–1648.
41.
JonesB.H., TonerM.M., DanielsW.L., & KnapikJ.J. (1984). The energy cost and heart-rate response of trained and untrained subjects walking and running in shoes and boots. Ergonomics, 27(8), 895–902.
42.
ChionS.S., BhattacharyaA., LaiC.F., & SuccopP.A. (2002/2003). Effects of environmental job-task factors on workers’ gait characteristics on slippery surfaces. Occupational Ergonomics, 3(4), 209–223.
43.
LockhartT.E., SpauldingJ.M., & ParkS.H. (2007). Age-related slip avoidance strategy while walking over a known slippery floor surface. Gait & Posture, 26(1), 142–149.
