The following notations shall, for the purpose of this chapter, have the meanings shown herein.
| D | = | dead load as defined by the building code |
| L | = | live load as defined by Section 303.2 |
| Z | = | horizontal sway loads as defined by Section 303.4.2.and Section 303.4.3 |
| Rr | = | guard or handrail loads as defined in Table 303.2 |