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Helix Pressure Gage to Indicate Roof Bolt Loads.

Authors
Anonymous
Source
NTIS: PB/235-272 Available for Reference At Bureau Libraries :58 pages
Link
NIOSHTIC No.
10000942
Abstract
This report (Contract No. H0111556) presents the results of a study to design, construct, and test a low-cost pressure gage to be used to monitor the change in load on individual roof bolts. The purpose of the gage is to offer a convenient means of estimating the stability of roof fall areas based on the premise that the load on individual roof bolts changes prior to failure. The gage indicated loads between 3,000 and 15,000 pounds with a +/-10 percent error. The unit can be read on a bolt to within +/-1,000 pounds load from a distance of 20 feet.
Publication Date
19730101
Document Type
CP; Final Contract Report;
Fiscal Year
1973
NTIS Accession No.
PB-235272
NTIS Price
A05
Identifying No.
OFR 40-74
NIOSH Division
DRC;
Source Name
NTIS: PB/235-272; Available for Reference At Bureau Libraries
State
VA;
Performing Organization
Virginia Polytechnic Inst.
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division