N.F.P.A. 1932 Chapter 3 - Definitions
The definitions contained in this chapter shall apply to the terms used in this standard. Where terms are not defined in this chapter or within another chapter, they shall be defined using thier ordinary accepted meanings within the context in which they are used. Merriam-Webster's Collegiate Dictionary, 11th edition, shall be the source for the ordinarily accepted meaning.
3.2 NFPA Official Definitions.
3.2.1* Approved. Acceptable to the authority having jurisdiction.
3.2.2* Authority Having Jurisdiction (AHJ). An organization, office, or individual responsible for enforcing the requirements of a code or standard, or for approving equipment, materials, an installation, or a procedure.
3.2.3 Shall. Indicates a mandatory requirement.
3.2.4 Should. Indicates a recommendation or that which is advised but not required.
3.2.5 Standard. A document, the main text of which contains only mandatory provisions using the word “shall” to indicate requirements and which is in a form generally suitable for mandatory reference by another standard or code or for adoption into law. Nonmandatory provisions shall be located in an appendix or annex, footnote, or fine-print note and are not to be considered a part of the requirements of a standard.
3.3 General Definitions.
3.3.1 Angle of Inclination. The angle incorporated between the beams and a level plane. [1931,2010]
3.3.2 Base (Bed) Section. The lowest or widest section of an extension ladder. [1931,2010]
3.3.3 Beam (Side Rail). The main structural side of the ground ladder. [1931,2010]
3.3.4 Bedded Position. The position in which the fly section(s) of an extension ladder is fully retracted with the pawls engaged. [1931,2010]
3.3.5* Butt. The end of the beam that is placed on the ground, or other lower support surface, when ground ladders are in the raised position. [1931,2010]
3.3.6* Butt Spurs (Feet). That component of ground ladder support that is in contact with the lower support surface to reduce slippage. [1931,2010]
3.3.7 Collapsible Ladder. See 3.3.15, Folding Ladder.
3.3.8 Combination Ladder. A ground ladder that is capable of being used as both a stepladder and as a single or extension ladder. [1931,2010]
3.3.9 Designated Length. The length marked on the ladder. [1931,2010]
3.3.10 Dogs. See 3.3.23, Pawls.
3.3.11 Duty Rating. The maximum load the ladder is designed to support when it is in use and properly positioned. [1931,2010]
3.3.12 Extension Ladder. A non-self-supporting ground ladder that consists of two or more sections traveling in guides, brackets, or the equivalen