RELATES TO: KRS Chapter 338, 29 C.F.R. 1910.333, 49 C.F.R. Part 571
NECESSITY, FUNCTION, AND CONFORMITY: KRS 338.051(3) requires the Kentucky Occupational Safety and Health Standards Board to promulgate occupational safety and health regulations and authorizes the chairman to reference federal standards without board approval if necessary to meet federal time requirements. KRS 338.061 authorizes the board to establish, modify, or repeal standards and reference federal standards. This administrative regulation establishes standards that are enforced by the Department of Workplace Standards in general industry.
Eis = Energy input to be absorbed during side loading. |
E'is = 723 + 0.4 W ft.-lb. (E'is = 100 + 0.12W', m.-kg.). |
Eir = Energy input to be absorbed during rear loading. |
Eir = 0.47 W ft.-lb. (E'ir = 0.14 W', m.-kg.). |
W = Tractor weight as prescribed in subsection (3)(e)1 and (e)3, in lb. (W', kg.). L = Static load, lb. (kg.). |
D = Deflection under L, in. (mm.). |
L-D = Static load-deflection diagram. |
LmDm = Modified static load-deflection diagram (Figure W-20). To account for increase in strength due to increase in strain rate, raise L in plastic range to L x K. |
K = Increase in yield strength induced by higher rate of loading (1.3 for hot rolled low carbon steel 1010-1030). Low carbon is preferable; however, if higher carbon or other material is used, K must be determined in the laboratory. Refer to Charles H. Norris, et al., Structural Design for Dynamic Loads (1959), p. 3. |
Lmax = Maximum observed static load. |
Load = Point on L-D curve where observed static load is Limit0.8 Lmax (refer to Figure W-19). |
Eu = Strain energy absorbed by the frame, ft.-lb. (m.-kg.) area under LmDm curve. |
FER = Factor of energy ratio, FER = Eu/Eis also = Eu/Eir |
Pb = Maximum observed force in mounting connection under static load, L, lb. (kg.). |
FSB = Design margin for mounting connection FSB = (Pu/Pb)-1. |
H = Vertical height of lift of 4.410 lb. (2,000 kg.) weight, in. (H', mm.). The weight shall be pulled back so that the height of its center of gravity above the point of impact is defined as follows: H = 4.92 + 0.00190 W or (H' = 125 + 0.107 W') (Figure W-24). |
803 KAR 2:325
STATUTORY AUTHORITY: KRS 338.051(3), 338.061