NFPA 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 equivalent arranged so as to allow length adjustment. [1931,2010]
3.3.13 Fire Department Ground Ladder. Any portable ladder specifically designed for fire department use in rescue, fire-fighting operations, or training. [1931,2010]
3.3.14 Fly Section(s). The upper section(s) of an extension ladder. [1931,2010]
3.3.15 Folding Ladder. A single-section ladder with rungs that can be folded or moved to allow the beams to be brought into a position touching or nearly touching each other. [1931,2010]
3.3.16* Free Weight. Test weights that are not controlled from any direction except by the force of gravity.
3.3.17 Halyard. Rope used on extension ladders for the purpose of raising a fly section(s). [1931,2010]
3.3.18 Heat Sensor Label. A label that changes color at a preset temperature to indicate a specific heat exposure. [1931,2010]
3.3.19 In Service. The status of a fire department ground ladder that has been inspected, maintained, and tested and currently is in use or available for use. [1931,2010]
3.3.20 Ladder. A device consisting of two beams (side rails) joined at regular intervals by cross pieces called rungs on which a person is supported during climbs for ascending or descending. (See also 3.3.24, Pompier Ladder.) 3.3.22
3.3.21 Maximum Extended Length. The total length of the extension ladder when all fly sections are fully extended and all pawls are engaged. [1931,2010]
3.3.22 Multi-Purpose Ladder: A ground ladder capable of being used either as a step ladder or a straight ladder and comprising two telescoping adjustable-length section assemblies connected via a hinge assembly. [1931,2010]
3.3.23 Pawls. Devices attached to a fly section(s) to engage ladder rungs near the beams of the section below for the purpose of anchoring the fly section(s). [1931,2010]
3.3.24 Permanent Deformation. That deformation remaining in any part of a ladder or its components after all test loads have been removed from the ladder. [1931,2010]
3.3.25 Pompier Ladder (Scaling Ladder). A ladder having a single center beam only, with rungs protruding on either side of the beam, and with a large hook on top that is used for scaling. [1931,2010]
3.3.26 Roof Ladder. A single ladder equipped with hooks at the top end of the ladder. [1931,2010]
3.3.27 Rungs. The ladder cross pieces on which a person steps while ascending or descending. [1931,2010]
3.3.28 Scaling Ladder. See 3.3.25, Pompier Ladder.
3.3.29 Service Tests. Tests performed on a ground ladder to determine if it meets the standard for continued service.
3.3.30 Side Rail. See 3.3.3, Beam.
3.3.31 Single Ladder. A non-self-supporting ground ladder, nonadjustable in length, consisting of only one section. [1931,2010]
3.3.32 Staypoles (Tormentors). Poles attached to each beam of the base section of extension ladders and used to assist in raising the ladder and to help provide stability of the raised ladder. [1931,2010]
3.3.33 Tested. Verification of compliance with test requirements as specified in this standard.
3.3.34 Tormentors or Tormentor Poles. See 3.3.32, Staypoles.
3.3.35 Ultimate Failure. Collapse of a ground ladder structure or component thereof. [1931,2010]
3.3.36 Visible Damage. A permanent change in condition that is clearly evident by visual inspection without recourse to optical measuring or observation devices. [1931,2010]
3.3.37 Visual Inspection. Observation by eye unaided by optical devices, except prescription eyeglasses or lenses. [1931,2010]
3.3.38 Working Length. The length of a non-self-supporting portable ladder measured along the beams from the base support point of the ladder to the point of bearing at the top. [1931,2010]
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