RB&W11 recommends turn-of-nut from snug fit to preload as follows: 1 / 3 turn for bolt grips of 1–4 diameters, 1 / 2 turn for bolt grips 4–8 diameters, and 2 / 3 turn for grips of 8–12 diameters....

RB&W11 recommends turn-of-nut from snug fit to preload as follows: 1/3 turn for bolt grips of 1–4 diameters, 1/2 turn for bolt grips 4–8 diameters, and 2/3 turn for grips of 8–12 diameters. These recommendations are for structural steel fabrication (permanent joints), producing preloads of 100 percent of proof strength and beyond. Machinery fabricators with fatigue loadings and possible joint disassembly have much smaller turns-of-nut. The RB&W recommendation enters the nonlinear plastic deformation zone.

For Ex. 8–4, use Eq. (8–27) with
K
= 0.2 to estimate the torque necessary to establish

the desired preload. Then, using the results from Prob. 8–27, determine the turn of the nut in

degrees. How does this compare with the RB&W recommendations?