U.S. flag An official website of the United States government.
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

i

A biomechanical assessment of hand/arm force with pneumatic nail gun actuation systems

Public Domain


Details

  • Personal Author:
  • Description:
    A biomechanical model is presented to estimate user hand/arm force exertion with two pneumatic nail gun trigger systems. The sequential actuation trigger (SAT) is safer than the contact actuation trigger (CAT) but increases the user's exertion of force because the trigger must be actuated after the safety tip is held pressed against the workpiece. Time integrated hand force was calculated for a single user based on direct measurement of nail gun tip force against the workpiece (tip contact) and from estimated force to support the tool weight during transfer between nails and during idle holding. The model shows that hand/arm force increases when nailing with the SAT (relative to CAT) and with a vertically-oriented workpiece (relative to horizontal). Expressed per nail fired, the user exerted 0.13Ns (horizontal orientation) and 2.88Ns (vertical orientation) integrated hand force during tip contact with CAT compared to 26.15Ns (horizontal) and 46.08Ns (vertical) with SAT. Depending upon idle holding duration, integrated hand force during tip contact was estimated to have been 1-3% of 48-132Ns total hand force with CAT and 21-44% of 83-167Ns total hand force with SAT (average of horizontal and vertical orientations). Based on standard time allowances from work measurement systems it is proposed that efficient application of hand force during tip contact with SAT can reduce this contribution to 6-15% of 55-139Ns total hand force. The model is useful for considering differences in hand/arm force exertion between the SAT and CAT systems. Relevance to industry: This paper presents a model of hand/arm force associated with two types of pneumatic nail gun actuation (trigger) systems. The model clarifies differences in user force exertion with the sequential actuation and contact actuation triggers to inform nail gun trigger selection decisions. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • ISSN:
    0169-8141
  • Document Type:
    Text
  • Genre:
    Journal Article
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Division:
    DART - Division of Applied Research and Technology
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Volume:
    44
  • Issue:
    5
  • NIOSHTIC Number:
    nn:20045070
  • Citation:
    Int J Ind Ergon 2014 Sep; 44(5):715-722
  • Contact Point Address:
    Brian D. Lowe, National Institute for Occupational Safety and Health, 4676 Columbia Parkway, MS C-24, Cincinnati, OH 45226
  • Email:
    blowe@cdc.gov
  • Federal Fiscal Year:
    2014
  • NORA Priority Area:
    Construction
  • Peer Reviewed:
    True
  • Source Full Name:
    International Journal of Industrial Ergonomics
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:ad02a42bd83254f98c7d0c8a781ee417ad5008a21b08cdd84c1a0ca88e827dd00d368395f89994e71e28dfc1cce33201b208615c2b996206e226e66404f31e3f
  • Download URL:
  • File Type:
    Filetype[PDF - 922.03 KB ]
PREVIOUS
ON THIS PAGE
Details
CDC STACKS serves as an archival repository of CDC-published products including scientific findings, journal articles, guidelines, recommendations, or other public health information authored or co-authored by CDC or funded partners.

As a repository, CDC STACKS retains documents in their original published format to ensure public access to scientific information.
BACK TO TOP