TABLE OF CONTENTS | A | area of cross-section, m 2 (in 2) the cross-sectional area of rivet shank, m 2 (in 2) | |
| b | breadth of cover plates (also with suffixes), m (in) | |
| c | distance from the centroid of the rivet group to the critical rivet, m(in) | |
| d | diameter of rivet, m (in) | |
| D i | internal diameter of pressure vessel, m (mm) | |
| e or l | eccentricity of loading, m (in) | |
| F | force on plate or rivets (also with suffixes), kN (lbf) | |
| h | thickness of plate or shell, m (in) | |
| h c, h 1, h 2 | thickness of cover plate (butt strap), m (in) | |
| i | number of rivets in a pitch fine (also with suffixes 1 and 2, respectively, for single shear and double shear rivets) | |
| I | moment of inertia, area, m 4, cm 4, (in 4) | |
| J | moment of inertia, polar, m 4, cm 4 (in 4) | |
 | coefficient (Table 13-11) | |
| m | margin, m (in) | |
| M b | bending moment, N m (lbf in) | |
| p | pitch on the gauge line or longitudinal pitch, m (in) | |
| p c | pitch along the caulking edge, m (in) | |
| p d | diagonal pitch, m (in) | |
| p t | transverse pitch, m (in) | |
| P f | intensity of fluid pressure, MPa (psi) | |
| Z | section modulus of the angle section, m 3, cm 3 |
